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Ppt on Major Diseases Of Brinjal: Symptoms Pathogens And Management

This presentation provides an in-depth overview of major diseases affecting brinjal (eggplant), focusing on their pathogens, symptoms, epidemiology, and management strategies. Emphasis is placed on the biology of the causal agents, disease cycles, and integrated approaches for effective control. Understanding these aspects is crucial for sustainable brinjal production and minimizing crop losses.

Little Leaf Disease of Brinjal

  • Caused by Phytoplasma, an ovoid to spherical pathogen localized in phloem sieve tubes.
  • Characterized by small, yellow, soft leaves with shortened petioles and internodes, giving a bushy appearance.
  • Axillary buds enlarge but remain stunted; flowering is rare and flowers, if present, remain green.
  • Fruiting is uncommon; any formed fruits are hard, necrotic, and often mummified.
  • Pathogen survives in weed hosts and is transmitted mainly by jassids (Hishimonas phycitis) and less efficiently by Empoasca devastans.

Epidemiology and Management of Little Leaf Disease

  • Collateral hosts include Datura spp., Vinca rosea, Argemone mexicana, chilli, tomato, and tobacco.
  • Disease cycle involves survival in weed hosts and transmission by insect vectors.
  • Management includes use of tolerant varieties (Pusa Purple Round, Pusa Purple Cluster, Arka Sheel).
  • Destruction of infected plants and eradication of solanaceous weeds are essential.
  • Chemical control: Spray methyl demeton (2 ml/L) or apply phorate granules; seed dip in tetracycline (10–50 ppm) recommended.

Bacterial Wilt of Brinjal

  • Caused by Ralstonia solanacearum, a Gram-negative, motile rod with polar flagella.
  • Race 1 infects solanaceous crops (tomato, eggplant) and some non-solanaceous hosts.
  • Symptoms include sudden wilting, leaf epinasty, yellowing, stunting, and browning of vascular tissues.
  • Whitish bacterial exudate may be observed from cross-sections of infected stems.

Epidemiology and Management of Bacterial Wilt

  • Pathogen is both soil- and seed-borne, surviving in plant debris, wild hosts, and weeds.
  • Spread occurs via irrigation water, infested soil, and contaminated tools.
  • Favored by high soil moisture and temperature.
  • Management: Grow resistant varieties (Pant Samrat, Arka Nidhi, Arka Neelakantha, Surya, BB 1, 44, 49).
  • Practices include crop rotation with non-solanaceous crops, green manuring (Brassica spp.), soil solarization, and biological control (Pseudomonas fluorescens, Bacillus spp., Erwinia spp.).

Integrated Management of Bacterial Wilt

  • Nursery: Treat seeds with talc-based Pseudomonas fluorescens (10g/100g seed); apply to nursery soil (50g/kg soil).
  • Main field: Dip seedlings in P. fluorescens or Bacillus subtilis suspension (25g talc formulation/L water) for 20–30 minutes before transplanting.
  • Drench leftover solution around root zones (50 ml/plant) to enhance protection.

Phomopsis Fruit Rot (Blight) of Brinjal

  • Severe in tropical and subtropical regions; first reported in India (Gujarat, 1935).
  • Pathogen produces septate, hyaline mycelium; pycnidia become erumpent with age.
  • Conidia are of two types: alpha (subcylindrical) and beta (filiform, curved); perfect stage forms perithecia with bicelled ascospores.
  • Attacks all growth stages, causing damping-off in nurseries, collar rot in young plants, and fruit rot in mature plants.

Symptoms and Epidemiology of Phomopsis Fruit Rot

  • Leaf symptoms: Circular to irregular grayish-brown spots with light centers; yellowing and premature leaf drop.
  • Stem lesions: Dark brown, oval, with grayish centers and pycnidia; can cause cankers and plant toppling.
  • Fruit symptoms: Pale, sunken spots that enlarge and become watery, leading to soft rot and mummification.
  • Pathogen is seed-borne and survives in plant debris as mycelium and pycnidia.
  • Dissemination via rain splash, irrigation, tools, and insects.

Management of Phomopsis Fruit Rot

  • Remove and destroy diseased crop debris to reduce inoculum.
  • Practice crop rotation and summer ploughing to minimize pathogen survival.
  • Use disease-free seed; hot water treat seed at 50°C for 30 minutes.
  • Seed treatment with thiophanate methyl (1g/kg seed) recommended.
  • Spray thiophanate methyl or carbendazim (0.1%) twice at 20-day intervals for effective control.

Cercospora Leaf Spot of Brinjal

  • Caused by Cercospora spp., leading to significant yield losses under high humidity.
  • Symptoms: Large, circular to irregular brown or grayish-brown leaf spots; coalescence leads to premature leaf drop and occasional fruit rot.
  • Fungus survives in infected plant debris and seeds; warm days, cool nights, and high humidity favor disease development.
  • Transmission facilitated by moist wind, irrigation water, and insects.

Management of Cercospora Leaf Spot

  • Adopt cultural practices: Destroy crop debris, rotate crops, use disease-free seeds, and maintain wider plant spacing.
  • Initiate fungicidal sprays (zineb 0.25%, carbendazim 0.1%, or thiophanate methyl 0.1%) at disease onset.
  • Repeat sprays at 10–14 day intervals for sustained protection.

Objective Questions

Q1. Which pathogen is responsible for little leaf disease in brinjal?
A. Phytoplasma
B. Ralstonia solanacearum
C. Cercospora melongenae
D. Phomopsis vexans
Answer: A

Q2. Which vector is considered a less efficient transmitter of little leaf disease in brinjal?
A. Hishimonas phycitis
B. Emposca devastans
C. Bemisia tabaci
D. Myzus persicae
Answer: B

Q3. Which management practice is NOT recommended for bacterial wilt of brinjal?
A. Use of resistant varieties like Pant Samrat and Arka Nidhi
B. Green manuring with Brassica species
C. Spraying methyl demeton
D. Soil solarization with transparent polyethylene sheet
Answer: C

Q4. What is the main symptom of Phomopsis fruit rot on brinjal fruits?
A. Small pale sunken spots that enlarge and cover the fruit surface
B. Water-soaked lesions with concentric rings
C. Powdery white growth on fruit surface
D. Black streaks along the fruit
Answer: A

Q5. Which of the following is NOT a collateral host for little leaf phytoplasma in brinjal?
A. Datura fastuosa
B. Vinca rosea
C. Brassica juncea
D. Argemone mexicana
Answer: C

Q6. Which of the following is a recommended seed treatment for managing Phomopsis fruit rot in brinjal?
A. Tetracycline 10-50 ppm
B. Hot water at 50°C for 30 minutes
C. Carbendazim 0.5% for 10 minutes
D. Copper oxychloride 0.2%
Answer: B

Q7. Which environmental condition most favors the development of Cercospora leaf spot in brinjal?
A. High humidity and heavy persistent dews
B. Low temperature and dry weather
C. High soil salinity
D. Alkaline soil pH
Answer: A

Q8. Which symptom is characteristic of bacterial wilt in brinjal?
A. Sudden wilting and death of infected plants
B. Mosaic pattern on leaves
C. Leaf curling and stunting
D. Brown pustules on stems
Answer: A

Q9. Which of the following is NOT a management strategy for little leaf disease in brinjal?
A. Destruction of affected plants
B. Eradication of solanaceous weed hosts
C. Crop rotation with solanaceous crops
D. Seed dip in tetracycline
Answer: C

Q10. Which type of conidia produced by Phomopsis fruit rot pathogen has an unclear role in disease epidemiology?
A. Alpha conidia
B. Beta conidia
C. Gamma conidia
D. Delta conidia
Answer: B

Ppt on Major Insect Pests Of Okra: Identification And Management

This presentation provides an in-depth overview of the major insect pests affecting okra and other vegetable crops, focusing on their identification, life cycle, damage symptoms, and management strategies. Emphasis is placed on integrated pest management (IPM) approaches, highlighting the importance of biological, cultural, and chemical control methods for sustainable crop protection.

Okra Shoot and Fruit Borer (Earias spp.) – Identification and Biology

  • Key species: Earias vitella and Earias insulana (Family: Noctuidae; Order: Lepidoptera).
  • E. vitella adults have pale whitish forewings with a broad greenish band; E. insulana adults have uniformly green forewings.
  • Larvae are brown with dorsal white streaks; pupae are brown and boat-shaped.
  • Eggs are laid on tender shoots, flower buds, and young fruits; each female lays up to 250 eggs.
  • Life cycle duration: 3 weeks in summer, 4 weeks in winter; up to 12 generations per year.

Economic Importance and Nature of Damage – Okra Shoot and Fruit Borer

  • Serious pest of okra, cotton, ambadi, and other malvaceous plants.
  • Larvae bore into tender shoots, flower buds, and fruits, causing withering and drying of shoots.
  • Infested flower buds and fruits drop prematurely; remaining fruits show exit holes and become deformed.
  • Significant yield losses due to direct feeding and secondary infections.

Management of Okra Shoot and Fruit Borer

  • Install pheromone traps at 12 per hectare for monitoring and mass trapping.
  • Collect and destroy affected fruits and plant parts to reduce larval population.
  • Release egg parasitoid Trichogramma chilonis (100,000/ha) and predator Chrysoperla carnea larvae (10,000/ha).
  • Apply Bacillus thuringiensis (2 g/l) or dust carbaryl 10% DP (25 kg/ha) as biopesticides.
  • Recommended insecticides: Azadirachtin, emamectin benzoate, phosalone, pyridalyl, quinalphos (follow label rates and safety guidelines).

Leaf Hopper (Amrasca biguttula biguttula) – Identification and Damage

  • Belongs to Family: Cicadellidae; Order: Hemiptera.
  • Nymphs and adults suck sap from the underside of leaves, injecting toxic saliva.
  • Damage symptoms: hopper burn, leaf crinkling, browning, stunted growth, and reduced fruit set.
  • Severe infestations can cause significant yield reduction.

Management of Leaf Hopper

  • Remove and destroy affected plant parts to reduce pest reservoirs.
  • Encourage natural enemies such as spiders (Distina albina) and chrysopids (Chrysopa cymbela).
  • Apply foliar sprays of dimethoate, methyl demeton, or fipronil at recommended concentrations.

Whitefly (Bemisia tabaci) – Identification and Damage

  • Family: Aleurodidae; Order: Hemiptera.
  • Nymphs and adults feed on leaf sap, causing loss of plant vigor and luster.
  • Acts as a vector for yellow vein mosaic virus (YVMV), leading to yellowing of veins and stunted growth.
  • Heavy infestations result in significant yield losses and virus spread.

Management of Whitefly

  • Remove and destroy infested plants to prevent spread.
  • Use yellow sticky traps for monitoring and mass trapping.
  • Apply insecticides such as acetamiprid, thiamethoxam, or profenophos at recommended rates.

Aphids (Aphis gossypii, Myzus persicae) – Identification and Damage

  • Family: Aphididae; Order: Hemiptera.
  • Nymphs and adults suck sap from leaves, causing yellowing, deformation, and drying of plants.
  • Secrete honeydew, promoting sooty mold growth and reducing photosynthesis.
  • Can transmit plant viruses, compounding crop losses.

Management of Aphids

  • Seed treatment with imidacloprid or thiamethoxam for early protection.
  • Use yellow sticky traps to monitor and reduce aphid populations.
  • Encourage natural predators and parasitoids for biological control.

Red Spider Mite (Tetranychus telarius/urticae) – Identification and Damage

  • Family: Tetranychidae; Order: Acarina.
  • Colonies found on the underside of leaves, protected by silk webbing.
  • Polyphagous pest infesting brinjal, okra, beans, and other crops.
  • Feeding causes blotches, leaf discoloration, and eventual drying and defoliation.

Management of Red Spider Mite

  • Spray wettable sulphur (3–5 g/l) or dust sulphur (20–25 kg/ha) for effective control.
  • Apply dicofol (2.7 ml/l), propargite (3 ml/l), or abamectin (150 ml/ha) as acaricides.
  • Repeat sprays at 10-day intervals for severe infestations.

Leaf Roller (Sylepta derogata) – Identification and Damage

  • Family: Pyralidae; Order: Lepidoptera.
  • Caterpillars fold leaves from tip upwards and feed within the folded area.
  • Infested leaves wither, dry up, and larvae remain concealed in leaf folds.

Management of Leaf Roller

  • Remove and destroy folded leaves along with larvae to reduce pest population.
  • Apply carbaryl 0.2% spray or dust 10% carbaryl at 20 kg/ha for chemical control.

Objective Questions

Q1. Which distinguishing feature is correct for the adult Earias insulana moth?
A. Forewings are uniformly silvery green
B. Forewings are pale with a wedge-shaped green band
C. Forewings are brown with white streaks
D. Forewings are sky blue in color
Answer: A

Q2. What is the approximate number of generations per year for Earias spp. on okra?
A. 4
B. 8
C. 12
D. 16
Answer: C

Q3. Which insecticide and dose is correctly matched for whitefly management on okra?
A. Acetamiprid 0.4 g/l
B. Carbaryl 10% DP 25 kg/ha
C. Dicofol 2.7 ml/l
D. Imidachloprid 5 kg/seed
Answer: A

Q4. Which parasitoid is released for biological control of okra shoot and fruit borer?
A. Trichogramma chilonis
B. Chrysoperla carnea
C. Distina albina
D. Chrysopa cymbela
Answer: A

Q5. What is the main symptom of leafhopper (Amrasca biguttula biguttula) infestation on okra?
A. Hopper burn
B. Sooty mould
C. Yellow vein mosaic
D. Webbing on leaves
Answer: A

Q6. Which pest acts as a vector for yellow vein mosaic virus in okra?
A. Bemisia tabaci
B. Amrasca biguttula biguttula
C. Aphis gossypii
D. Sylepta derogata
Answer: A

Q7. Which management practice is NOT recommended for red spider mite control?
A. Spray with 0.2% sulphur
B. Spray with 0.03% dicofol
C. Spray with Bacillus thuringiensis
D. Dusting with sulphur @ 20-25 kg/ha
Answer: C

Q8. Which is a correct host plant for Earias spp. besides okra?
A. Cotton
B. Tomato
C. Potato
D. Apple
Answer: A

Q9. Which statement is true regarding the larva of Earias vitella?
A. Brownish with white streaks dorsally and pale yellow ventrally
B. Brown with a white median longitudinal streak
C. Green with black spots
D. Yellow with red bands
Answer: A

Q10. Which control measure is specific for leaf roller (Sylepta derogata) on okra?
A. Removal and destruction of leaf fold along with caterpillar
B. Spray with acetamiprid 0.4 g/l
C. Release of Trichogramma chilonis
D. Use of yellow sticky traps
Answer: A

Ppt on Identification Damage And Management Of Major Brinjal Pests

Brinjal (Solanum melongena) is affected by a diverse array of insect pests that can significantly reduce yield and market value. Key pests include the brinjal fruit and shoot borer, epilachna beetle, brown leafhopper, whitefly, aphids, brinjal lace wing, leaf roller, and mites. Effective identification, understanding of life cycles, and integrated management strategies are essential for sustainable brinjal production.
Brinjal Fruit and Shoot Borer (Leucinodes orbonalis)
  • Belongs to family Pyralidae, order Lepidoptera; serious pest of brinjal.
  • Adult moth is medium-sized with whitish forewings marked by black and brown patches; caterpillar is small and light pink.
  • Eggs (up to 250) are laid singly on leaves, shoots, flower buds, or fruits; larval period lasts 12–15 days in summer, 22 days in winter.
  • Larvae bore into shoots and fruits, causing withering, drying, and fruit damage (up to 21% loss); infested fruits show circular holes plugged with excreta.
  • Management includes removal of infested plant parts, use of larval parasitoids (Microbracon greeni), pheromone traps (5/ha), and insecticidal sprays (carbaryl, profenofos, cypermethrin).
Epilachna Beetle (Epilachna dodecastigma)
  • Member of family Coccinellidae, order Coleoptera; also known as spotted leaf beetle or hadda beetle.
  • Adults are small, round to oblong, brick red or pinkish with 12–28 black dots; grubs are yellowish, spiny, and broad at the front.
  • Eggs laid on leaf undersides; larval period 10–35 days, pupal period 3–6 days; total life cycle 17–50 days.
  • Both grubs and adults feed on leaf chlorophyll, creating skeletonized patches and reducing photosynthetic area.
  • Control by hand-picking, destruction of egg masses, use of parasitoids (Tetrastichus ovularum, Uga menoni), and foliar insecticides (DDVP, carbaryl, profenofos, quinalphos).
Brown Leafhopper (Cestius phycitis)
  • Family Cicadellidae, order Hemiptera; small, light brown adults.
  • Feeds on plant sap, causing leaf size reduction, shortened petioles, bushy growth, and stunted plants.
  • Can induce ‘little leaf’ disease, leading to conversion of floral parts into leafy structures and rare fruiting.
  • Management includes removal and destruction of infected plants, seedling dip in carbofuran, and spraying with dimethoate.
Whitefly (Bemisia tabaci)
  • Family Aleurodidae, order Hemiptera; adults have yellowish bodies, red eyes, and white or greenish wings.
  • Common and serious pest of brinjal and other solanaceous crops; nymphs are pale yellow and sluggish.
  • Life cycle completed in 13–122 days; up to 10–12 generations per year.
  • Nymphs and adults suck sap, causing leaf withering, browning, and flower shedding; excrete honeydew leading to sooty mould and reduced photosynthesis.
  • Control via insecticidal sprays (dimethoate, malathion, methyl demeton, monocrotophos).
Aphids (Aphis gossypii, Myzus persicae)
  • Family Aphididae, order Hemiptera; nymphs and adults are small, soft-bodied insects.
  • Suck sap from leaves, causing yellowing, deformation, and drying of plants.
  • Honeydew secretion promotes sooty mould growth, further reducing photosynthetic efficiency.
  • Management includes seed treatment with imidacloprid or thiamethoxam, and use of yellow sticky traps.
Brinjal Lace Wing/Tingid Bug (Urentius sentis)
  • Family Tingidae, order Hemiptera; nymphs and adults feed on leaf sap.
  • Infestation leads to yellowing, withering, and leaves covered with exuviae and excreta, especially in summer crops.
  • Control by spraying with DDVP or dusting with carbaryl.
Leaf Roller (Antoba olivacea)
  • Family Pyralidae, order Lepidoptera; caterpillars fold leaves from tip upwards and feed within the fold.
  • Infested leaves wither and dry; larvae are always found inside the leaf fold.
  • Management includes removal and destruction of infested leaves, and application of carbaryl dust or spray.
Mites (Tetranychus telarius)
  • Family Tetranychidae, order Acarina; tiny pests that suck cell sap from leaves.
  • Infestation causes yellowing and withering of leaves, reducing plant vigor.
  • Control measures include spraying with sulphur, dicofol, or abamectin, and dusting with sulphur.

Objective Questions

Q1. Which pest is known to cause circular holes in brinjal fruits, making them unfit for human consumption?
A. Leucinodes orbonalis
B. Epilachna dodecastigma
C. Cestius phycitis
D. Bemisia tabaci
Answer: A

Q2. Which larval parasitoid is used to suppress the population of Brinjal Fruit and Shoot Borer?
A. Uga menoni
B. Microbracon greeni
C. Tetrastichus ovularum
D. Trichogramma chilonis
Answer: B

Q3. What is the total life cycle duration range for Epilachna dodecastigma on brinjal?
A. 7-10 days
B. 13-122 days
C. 17-50 days
D. 22-35 days
Answer: C

Q4. Which pest is a vector of little leaf disease in brinjal?
A. Bemisia tabaci
B. Cestius phycitis
C. Aphis gossypii
D. Urentius sentis
Answer: B

Q5. Which chemical is recommended for seed treatment to control aphids in brinjal?
A. Carbaryl
B. Imidachloprid
C. Dimethoate
D. Malathion
Answer: B

Q6. Which pest's nymphs and adults excrete honeydew, leading to the development of black sooty mould on brinjal leaves?
A. Leucinodes orbonalis
B. Epilachna dodecastigma
C. Bemisia tabaci
D. Antoba olivceea
Answer: C

Q7. What is the recommended spray concentration of DDVP for controlling brinjal lace wing (Tingid bug)?
A. 0.2%
B. 0.05%
C. 0.3%
D. 0.075%
Answer: B

Q8. Which pest folds the leaves from tip upwards and feeds within the green matter of brinjal?
A. Tetranychus telarius
B. Antoba olivceea
C. Urentius sentis
D. Myzus persicae
Answer: B

Q9. Which pest's damage results in skeletonized patches on brinjal leaves due to feeding between veins?
A. Epilachna dodecastigma
B. Cestius phycitis
C. Leucinodes orbonalis
D. Tetranychus telarius
Answer: A

Q10. Which acaricide is recommended for spraying against mites on brinjal at 0.03% concentration?
A. Carbaryl
B. Sulphur
C. Dicofol
D. Dimethoate
Answer: C

Ppt on Major Insect Pests Of Tomato And Their Management – Advanced Notes

This presentation covers the major insect pests of tomato, focusing on their identification, biology, nature of damage, and management strategies. Emphasis is placed on integrated pest management (IPM) approaches, including biological, cultural, and chemical control. Understanding these pests is crucial for sustainable tomato production and minimizing crop losses. Key academic terms include Helicoverpa armigera, integrated pest management, vector, biological control, and chemical control.
Introduction to Tomato Pests
  • Tomato is affected by several insect pests causing significant yield loss.
  • Pests attack various plant parts: leaves, stems, flowers, and fruits.
  • Effective management requires correct identification and integrated approaches.
Tomato Fruit Borer (Helicoverpa armigera)
Scientific Name: Helicoverpa armigera
Family: Noctuidae
Order: Lepidoptera
Distribution: Tropics, subtropics, and warmer temperate regions.
Identification:

  • Caterpillar: Varying color, radiating hairs, brown to greenish with dark lines.
  • Moth: Medium-sized, light yellowish-brown, forewings with dark spot, hindwings pale with black border.
Tomato Fruit Borer – Biology and Damage
Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval stage: 18–25 days; pupates in soil.
  • Complete life cycle: ~30–40 days.

Nature of Damage:

  • Young larvae feed on foliage; older larvae bore into fruits.
  • Bores circular holes, feeds inside fruit, causing rot by secondary infection.
  • One larva can damage 2–8 fruits.
Tomato Fruit Borer – Management
Cultural Control:

  • Collect and destroy infested fruits and larvae.
  • Deep ploughing after harvest to expose pupae.
  • Intercrop with marigold (1:16 rows) to attract egg-laying adults.
  • Grow resistant varieties (e.g., Rupali, Roma, Pusa Red Plume).

Biological Control:

  • Release Trichogramma pretiosum or T. chilonis (egg parasitoids).
  • Release Chrysoperla carnea larvae (predator).
  • Spray Bacillus thuringiensis or Helicoverpa NPV.

Chemical Control:

  • Use pheromone traps (Helilure) at 12/ha.
  • Recommended insecticides: Azadirachtin, Indoxacarb, Flubendiamide, Novaluron, Phosalone, Quinalphos (as per label rates).
Serpentine Leaf Miner (Liriomyza trifolii)
Scientific Name: Liriomyza trifolii
Family: Agromyzidae
Order: Diptera
Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Adult: Small, pale yellow fly.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; pupation in soil or leaves.
  • Total life cycle: ~3 weeks.

Nature of Damage:

  • Larvae mine between leaf epidermis, creating serpentine trails.
  • Severe infestation causes leaf drying and drop.

Management:

  • Remove and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
Tomato Leaf Miner (Tuta absoluta)
Scientific Name: Tuta absoluta
Family: Gelechiidae
Order: Lepidoptera
Nature of Damage:

  • Larvae mine leaves, stems, and fruits.
  • Causes leaf necrosis, fruit damage, and yield loss.

Management:

  • Use pheromone traps for monitoring and mass trapping.
  • Remove and destroy infested plant parts.
  • Apply biological agents (Trichogramma, Bacillus thuringiensis).
  • Use recommended insecticides judiciously.
Whitefly (Bemisia tabaci)
Scientific Name: Bemisia tabaci
Family: Aleyrodidae
Order: Hemiptera
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish-white.
  • Adults: Tiny, white, scale-like.

Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy infected plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran or recommended insecticides (dimethoate, malathion, thiamethoxam).
Aphids (Aphis gossypii, Myzus persicae)
Scientific Names: Aphis gossypii, Myzus persicae
Family: Aphididae
Order: Hemiptera
Nature of Damage:

  • Nymphs and adults suck sap, causing yellowing, deformation, and drying.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
  • Spray recommended insecticides if needed.
Thrips (Thrips tabaci)
Scientific Name: Thrips tabaci
Family: Thripidae
Order: Thysanoptera
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark, fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, bud necrosis, flower drop.
  • Vector of tomato spotted wilt virus.

Management:

  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton or dimethoate as per recommendations.
Red Spider Mite (Tetranychus spp.)
Scientific Name: Tetranychus spp.
Family: Tetranychidae
Order: Acarina
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves turn reddish-brown, bronzed, and dry.
  • Webbing on leaves; severe infestation affects flowering and fruiting.

Management:

  • Spray wettable sulphur (50 WP, 2g/lit).
  • Spray dicofol (18.5 EC, 2.5 ml/lit).
Summary: Integrated Pest Management in Tomato
  • Correct pest identification is essential for effective management.
  • Combine cultural, biological, and chemical methods for sustainable control.
  • Monitor pest populations using traps and field scouting.
  • Use resistant varieties and maintain field hygiene.
  • Apply insecticides judiciously to avoid resistance and protect beneficial organisms.

Objective Questions

Q1. Which family does the tomato fruit borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Thripidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato rows for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide is recommended at a dose of 8 ml/10 lit for tomato fruit borer control?
A. Flubendiamide 20 WG
B. Indoxacarb 14.5% SC
C. Novaluron 10% EC
D. Phosalone 35% EC
Answer: B

Q4. The serpentine leaf miner, Liriomyza trifolii, belongs to which order?
A. Lepidoptera
B. Diptera
C. Hemiptera
D. Thysonoptera
Answer: B

Q5. Which pest is a vector of tomato leaf curl disease?
A. Thrips tabaci
B. Bemisia tabaci
C. Tetranychus spp
D. Aphis gossypii
Answer: B

Q6. Which of the following is NOT a recommended chemical for whitefly control on tomato?
A. Dimethoate 30% EC
B. Malathion 50% EC
C. Thiamethoxam 25% WG
D. Flubendiamide 20 WG
Answer: D

Q7. Which pest causes silvery streaks on tomato leaf surfaces and is a vector of tomato spotted wilt virus?
A. Aphis gossypii
B. Thrips tabaci
C. Tuta absoluta
D. Tetranychus spp
Answer: B

Q8. What is the recommended dose of wettable sulphur for controlling red spider mite on tomato?
A. 2 g/lit
B. 5 g/lit
C. 8 ml/10 lit
D. 13 ml/10 lit
Answer: A

Q9. Which biological control agent is released at 1 lakh/ha for tomato fruit borer management?
A. Chrysoperla carnea
B. Trichogramma pretiosum
C. Trichogramma chilonis
D. Bacillus thuringiensis
Answer: B

Q10. Which pest's nymphs and adults secrete honeydew that leads to sooty mould on tomato plants?
A. Bemisia tabaci
B. Tuta absoluta
C. Aphis gossypii
D. Thrips tabaci
Answer: C

Ppt on Tomato Fruit Borer: Identification, Damage Symptoms And Management Strategies

This presentation covers the major insect pests of tomato, focusing on their identification, biology, nature of damage, and management strategies. Emphasis is placed on integrated pest management (IPM), including biological, cultural, and chemical control methods. Key pests discussed include the tomato fruit borer, serpentine leaf miner, whitefly, aphids, thrips, and red spider mite. Understanding pest life cycles and damage symptoms is essential for effective control and sustainable tomato production. Important academic keywords include Helicoverpa armigera, integrated pest management, biological control, vector, and resistant varieties.
Introduction to Tomato Pests
  • Tomato is affected by several major insect pests causing significant yield loss.
  • Pests attack various plant parts: leaves, stems, flowers, and fruits.
  • Effective management requires knowledge of pest biology and damage symptoms.
  • Integrated pest management (IPM) combines cultural, biological, and chemical methods.
Tomato Fruit Borer (Helicoverpa armigera)
Scientific Name: Helicoverpa armigera
Family: Noctuidae
Order: Lepidoptera
Distribution: Tropics, subtropics, and warmer temperate regions.
Identification:

  • Caterpillars: Varying color, radiating hairs, brown to greenish with dark lines.
  • Moth: Medium-sized, light yellowish brown, forewings with dark spot, hindwings pale with black border.
Tomato Fruit Borer – Biology and Damage
Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval period: 18–25 days; pupates in soil.
  • Complete life cycle: ~30–40 days.

Nature of Damage:

  • Young larvae feed on foliage; older larvae bore into fruits.
  • Bores circular holes, feeds on fruit contents.
  • Damaged fruits often invaded by secondary pathogens.
  • One larva can damage 2–8 fruits.
Tomato Fruit Borer – Management
Cultural and Mechanical Control:

  • Collect and destroy infested fruits and larvae.
  • Deep ploughing after harvest to expose pupae.
  • Intercrop with marigold (1:16 rows) to attract egg-laying adults.

Biological Control:

  • Release Trichogramma pretiosum or T. chilonis (egg parasitoids).
  • Release Chrysoperla carnea (predator) at 30 days after planting.
  • Spray Bacillus thuringiensis or Helicoverpa NPV.

Chemical Control:

  • Use pheromone traps (Helilure) at 12/ha.
  • Spray recommended insecticides: Azadirachtin, Indoxacarb, Flubendiamide, Novaluron, Phosalone, Quinalphos (as per label rates).
  • Grow resistant varieties: Rupali, Roma, Pusa Red Plume.
Serpentine Leaf Miner (Liriomyza trifolii)
Scientific Name: Liriomyza trifolii
Family: Agromyzidae
Order: Diptera
Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Adult: Small, pale yellow flies.

Life Cycle:

  • Eggs laid singly on leaf surface.
  • Larval period: 7–10 days; pupates in soil or leaves.
  • Total life cycle: ~3 weeks.
Serpentine Leaf Miner – Damage and Management
Nature of Damage:

  • Larvae mine between leaf epidermal layers, creating serpentine tunnels.
  • Severe infestation causes leaf drying and drop.

Management:

  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
  • Use yellow sticky traps for monitoring.
Whitefly (Bemisia tabaci)
Scientific Name: Bemisia tabaci
Family: Aleyrodidae
Order: Hemiptera
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish-white.
  • Adults: Tiny, white, scale-like.
Whitefly – Damage and Management
Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy infected plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran 3G or recommended insecticides: Dimethoate, Malathion, Oxydemeton-methyl, Thiamethoxam.
Aphids (Aphis gossypii, Myzus persicae)
Scientific Names: Aphis gossypii, Myzus persicae
Family: Aphididae
Order: Hemiptera
Nature of Damage:

  • Nymphs and adults suck sap from leaves and shoots.
  • Plants turn yellow, become deformed, and may dry up.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.
Aphids – Management
  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps for monitoring and control.
  • Spray recommended systemic insecticides if needed.
Thrips (Thrips tabaci)
Scientific Name: Thrips tabaci
Family: Thripidae
Order: Thysanoptera
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark, slender, fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, bud necrosis, premature flower drop.
  • Vector of tomato spotted wilt virus.
Thrips – Management
  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton or dimethoate as per recommendations.
Red Spider Mite (Tetranychus spp.)
Scientific Name: Tetranychus spp.
Family: Tetranychidae
Order: Acarina
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves turn reddish-brown, bronzed, and dry.
  • Webbing on leaves; severe infestation affects flowering and fruiting.
Red Spider Mite – Management
  • Spray wettable sulphur 50 WP (2 g/litre).
  • Spray dicofol 18.5 EC (2.5 ml/litre) if needed.
  • Maintain field sanitation and avoid dust accumulation.
Summary: Integrated Pest Management in Tomato
  • Monitor pest populations regularly using traps and field scouting.
  • Adopt resistant varieties and crop rotation.
  • Promote natural enemies and use biopesticides.
  • Apply chemical pesticides judiciously, following recommended doses and intervals.
  • Combine cultural, biological, and chemical methods for sustainable pest management.

Objective Questions

Q1. Which family does Helicoverpa armigera belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Aleurodidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato rows for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide is recommended at a dose of 8 ml/10 lit for tomato fruit borer control?
A. Flubendiamide
B. Indoxacarb
C. Novaluron
D. Phosalone
Answer: B

Q4. Which pest is introduced into India through chrysanthemum cuttings?
A. Tuta absoluta
B. Liriomyza trifolii
C. Bemisia tabaci
D. Aphis gossypii
Answer: B

Q5. Which order does the whitefly, Bemisia tabaci, belong to?
A. Lepidoptera
B. Diptera
C. Hemiptera
D. Thysonoptera
Answer: C

Q6. Which pest is a vector of tomato spotted wilt virus?
A. Aphids
B. Thrips tabaci
C. Red spider mite
D. Tuta absoluta
Answer: B

Q7. What is the recommended dose of wettable sulphur for red spider mite control?
A. 2g/lit
B. 5g/lit
C. 8g/lit
D. 10g/lit
Answer: A

Q8. Which pest's larvae are described as minute orange yellowish apodous maggots?
A. Helicoverpa armigera
B. Thrips tabaci
C. Liriomyza trifolii
D. Tetranychus spp
Answer: C

Q9. Which chemical is recommended for seed treatment against aphids?
A. Imidachloprid
B. Dimethoate
C. Dicofol
D. Azadirachtin
Answer: A

Q10. Which pest's adult is described as red colored and small sized?
A. Bemisia tabaci
B. Thrips tabaci
C. Tetranychus spp
D. Liriomyza trifolii
Answer: C

Ppt on Key Insect Pests Affecting Tomato And Their Control Approaches

This presentation provides an overview of major insect pests affecting tomato crops, focusing on their identification, nature of damage, life cycles, and integrated management strategies. Emphasis is placed on the economic impact, pest biology, and effective control measures, including cultural, biological, and chemical methods. Key topics include the management of Helicoverpa armigera, Liriomyza trifolii, Tuta absoluta, Bemisia tabaci, and Thrips tabaci, which are crucial for sustainable tomato production and pest resistance management.
Introduction to Tomato Pests
  • Tomato is susceptible to several major insect pests causing significant yield losses.
  • Pests affect all growth stages, from seedlings to fruiting plants.
  • Effective management requires understanding pest biology and integrated control methods.
Tomato Fruit Borer (Helicoverpa armigera)
Scientific Name: Helicoverpa armigera
Family: Noctuidae
Order: Lepidoptera
Distribution: Widely found in tropics, subtropics, and warm temperate regions.
Economic Importance:

  • Major pest of tomato, also attacks tur and gram.

Identification:

  • Caterpillars: Variable color, radiating hairs, brown to greenish with dark lines.
  • Moth: Medium-sized, light yellowish brown, forewings with dark spot, hindwings smoky white with black border.

Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval period: 18–25 days; pupates in soil.
  • Total life cycle: 30–40 days.

Nature of Damage:

  • Larvae bore circular holes in fruits, feed on inner contents.
  • Secondary infection by fungi and bacteria.
  • One larva can damage 2–8 fruits.

Management:

  • Collect and destroy infested fruits and larvae.
  • Intercrop with marigold (1:16 rows) to attract pests.
  • Deep ploughing after harvest to expose pupae.
  • Install pheromone traps (Helilure) at 12/ha.
  • Grow resistant varieties (Rupali, Roma, Pusa Red Plume).
  • Spray Bacillus thuringiensis (2g/lit).
  • Release Trichogramma spp. and Chrysoperla carnea as biocontrol agents.
  • Spray HaNPV @ 250 LE/ha for biological control.
  • Chemical options: Azadirachtin, Indoxacarb, Flubendiamide, Novaluron, Phosalone, Quinalphos (as per recommended doses).
Serpentine Leaf Miner (Liriomyza trifolii)
Scientific Name: Liriomyza trifolii
Family: Agromyzidae
Order: Diptera
Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Pupa: Yellowish brown, found in soil or leaves.
  • Adult: Pale yellow, small fly.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; total cycle ~3 weeks.

Nature of Damage:

  • Larvae mine between leaf epidermal layers, creating serpentine trails.
  • Severe infestation causes leaf drying and drop.

Management:

  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
Tomato Leaf Miner (Tuta absoluta)
Scientific Name: Tuta absoluta
Family: Gelechiidae
Order: Lepidoptera
Identification:

  • Small greyish moth; larvae are cream to greenish with dark head.

Nature of Damage:

  • Larvae mine leaves, stems, and fruits, causing blotches and fruit damage.
  • Can cause up to 80–100% yield loss if unmanaged.

Management:

  • Use pheromone traps for monitoring and mass trapping.
  • Remove and destroy infested plant parts.
  • Release natural enemies (Trichogramma spp., Nesidiocoris tenuis).
  • Apply Bacillus thuringiensis or selective insecticides as per recommendations.
Whitefly (Bemisia tabaci)
Scientific Name: Bemisia tabaci
Family: Aleyrodidae
Order: Hemiptera
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish white.
  • Adults: Tiny, white, scale-like.

Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy infected plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran 3% G @ 40 kg/ha or recommended insecticides (Dimethoate, Malathion, Oxydemeton-methyl, Thiamethoxam).
Aphids (Aphis gossypii, Myzus persicae)
Scientific Names: Aphis gossypii, Myzus persicae
Family: Aphididae
Order: Hemiptera
Nature of Damage:

  • Nymphs and adults suck sap from leaves and stems.
  • Plants turn yellow, become deformed, and may dry up.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
  • Spray recommended systemic insecticides if needed.
Thrips (Thrips tabaci)
Scientific Name: Thrips tabaci
Family: Thripidae
Order: Thysanoptera
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark with fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, premature flower drop, bud necrosis.
  • Vector of tomato spotted wilt virus.

Management:

  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton or dimethoate as per recommendations.
Red Spider Mite (Tetranychus spp.)
Scientific Name: Tetranychus spp.
Family: Tetranychidae
Order: Acarina
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves turn reddish-brown and bronzy.
  • Webbing on leaves; severe cases cause leaf drying and reduced fruit set.

Management:

  • Spray wettable sulphur 50 WP (2g/lit).
  • Spray dicofol 18.5 EC (2.5 ml/lit) if needed.
Summary: Integrated Pest Management in Tomato
  • Combine cultural, biological, and chemical methods for effective pest control.
  • Monitor fields regularly for early pest detection.
  • Promote use of resistant varieties and natural enemies.
  • Minimize pesticide use to delay resistance and protect beneficial organisms.

Objective Questions

Q1. Which family does the tomato fruit borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Aleurodidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato seedlings for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide and dose is recommended for chemical control of whitefly on tomato?
A. Indoxacarb 8 ml/10 lit
B. Dimethoate 1.0 ml/lit
C. Flubendiamide 5 g/10 lit
D. Azadirachtin 2.0 ml/lit
Answer: B

Q4. Which pest is the vector of tomato leaf curl disease?
A. Thrips tabaci
B. Bemisia tabaci
C. Tetranychus spp
D. Liriomyza trifolii
Answer: B

Q5. What is the total life cycle duration of the serpentine leaf miner?
A. 5-6 days
B. 7-10 days
C. 3 weeks
D. 18-25 days
Answer: C

Q6. Which biological control agent is released at 1 lakh/ha for tomato fruit borer management?
A. Trichogramma chilonis
B. Trichogramma pretiosum
C. Chrysoperla carnea
D. Bacillus thuringiensis
Answer: B

Q7. Which pest causes silvery streaks on tomato leaves and is a vector of tomato spotted wilt virus?
A. Aphis gossypii
B. Tuta absoluta
C. Thrips tabaci
D. Helicoverpa armigera
Answer: C

Q8. Which of the following is NOT a recommended chemical for tomato fruit borer control?
A. Novaluron
B. Quinalphos
C. Malathion
D. Flubendiamide
Answer: C

Q9. What is the main symptom of red spider mite infestation on tomato leaves?
A. Silvery mines
B. Reddish brown and bronzy leaves
C. Downward curling
D. Circular holes in fruits
Answer: B

Q10. Which pest's larvae are described as minute orange yellowish apodous maggots?
A. Helicoverpa armigera
B. Tuta absoluta
C. Liriomyza trifolii
D. Aphis gossypii
Answer: C

Ppt on Key Insect Pests Affecting Tomato And Their Control Strategies

This presentation covers the major insect pests of tomato, focusing on their identification, biology, nature of damage, and management strategies. Emphasis is placed on integrated pest management, including biological, cultural, and chemical control methods. Understanding these pests is essential for sustainable tomato production and minimizing crop losses. Key academic terms include Helicoverpa armigera, Tuta absoluta, integrated pest management, vector, and biological control.
Introduction to Tomato Pests
  • Tomato is affected by several major insect pests worldwide.
  • Pests cause direct damage and act as vectors for viral diseases.
  • Effective management is crucial for yield and quality.
Tomato Fruit Borer (Helicoverpa armigera)
Scientific Name: Helicoverpa armigera
Family: Noctuidae
Order: Lepidoptera
Distribution: Tropics, subtropics, and warmer temperate regions
Economic Importance:

  • Major pest of tomato and other crops (e.g., pigeon pea, chickpea).
Tomato Fruit Borer – Identification and Life Cycle
Identification:

  • Caterpillar: Varies in color, radiating hairs, brown to greenish with dark lines.
  • Moth: Medium-sized, light yellowish-brown, forewings with dark spot, hindwings pale with black border.

Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval stage: 18–25 days.
  • Pupates in soil.
  • Total life cycle: 30–40 days.
Tomato Fruit Borer – Nature of Damage
  • Young larvae feed on foliage; older larvae bore into fruits.
  • Creates circular holes in fruits, feeds on inner contents.
  • Damaged fruits often infected by secondary pathogens.
  • One larva can destroy 2–8 fruits.
Tomato Fruit Borer – Management
Cultural Control:

  • Collect and destroy infested fruits and larvae.
  • Deep ploughing after harvest to expose pupae.
  • Intercrop tomato with marigold (1:16 rows).

Biological Control:

  • Release Trichogramma spp. and Chrysoperla carnea.
  • Spray Bacillus thuringiensis (2g/lit).
  • Use Helicoverpa NPV (HaNPV) @ 250 LE/ha.

Chemical Control:

  • Use pheromone traps (Helilure) @ 12/ha.
  • Spray recommended insecticides: Azadirachtin, Indoxacarb, Flubendiamide, Novaluron, Phosalone, Quinalphos.
Serpentine Leaf Miner (Liriomyza trifolii)
Scientific Name: Liriomyza trifolii
Family: Agromyzidae
Order: Diptera
Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Adult: Small, pale yellow flies.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; pupates in soil or leaves.
  • Total life cycle: ~3 weeks.
Serpentine Leaf Miner – Damage and Management
Nature of Damage:

  • Larvae mine between leaf epidermal layers, creating serpentine trails.
  • Severe infestation causes leaf drying and drop.

Management:

  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
Tomato Leaf Miner (Tuta absoluta)
Scientific Name: Tuta absoluta
Family: Gelechiidae
Order: Lepidoptera
Nature of Damage:

  • Larvae mine leaves, stems, and fruits.
  • Causes leaf necrosis, fruit damage, and yield loss.

Management:

  • Use pheromone traps, biological control agents, and selective insecticides.
Whitefly (Bemisia tabaci)
Scientific Name: Bemisia tabaci
Family: Aleyrodidae
Order: Hemiptera
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish-white.
  • Adults: Tiny, white, scale-like.
Whitefly – Damage and Management
Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy infected plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran or recommended insecticides: Dimethoate, Malathion, Oxydemeton-methyl, Thiamethoxam.
Aphids (Aphis gossypii, Myzus persicae)
Scientific Names: Aphis gossypii, Myzus persicae
Family: Aphididae
Order: Hemiptera
Nature of Damage:

  • Nymphs and adults suck sap, causing yellowing and deformation.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
Thrips (Thrips tabaci)
Scientific Name: Thrips tabaci
Family: Thripidae
Order: Thysanoptera
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark, fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, bud necrosis, flower drop.
  • Vector of tomato spotted wilt virus.
Thrips – Management
  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton 25 EC or dimethoate 30 EC @ 1 L/ha.
Red Spider Mite (Tetranychus spp.)
Scientific Name: Tetranychus spp.
Family: Tetranychidae
Order: Acarina
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves turn reddish-brown, bronzed, and dry.
  • Webbing on leaves; reduced flower and fruit formation.
Red Spider Mite – Management
  • Spray wettable sulphur 50 WP @ 2g/lit.
  • Spray dicofol 18.5 EC @ 2.5 ml/lit.
Summary: Integrated Pest Management in Tomato
  • Combine cultural, biological, and chemical methods for effective pest control.
  • Monitor pest populations regularly.
  • Use resistant varieties and crop rotation.
  • Minimize pesticide use to prevent resistance and protect beneficial organisms.

Objective Questions

Q1. Which family does the tomato fruit borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Aleurodidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato seedlings for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide is recommended at a dose of 8 ml/10 lit for tomato fruit borer control?
A. Flubendiamide 20 WG
B. Indoxacarb 14.5% SC
C. Novaluron 10% EC
D. Quinalphos 25% EC
Answer: B

Q4. Which pest is a vector of tomato leaf curl disease?
A. Thrips tabaci
B. Bemisia tabaci
C. Aphis gossypii
D. Tuta absoluta
Answer: B

Q5. What is the order of the serpentine leaf miner, Liriomyza trifolii?
A. Lepidoptera
B. Hemiptera
C. Diptera
D. Thysonoptera
Answer: C

Q6. Which biological control agent is released at 1 lakh/ha for tomato fruit borer management?
A. Trichogramma chilonis
B. Trichogramma pretiosum
C. Chrysoperla carnea
D. Bacillus thuringiensis
Answer: B

Q7. Which chemical is applied at 2g/lit for red spider mite management?
A. Dicofol 18.5 EC
B. Wettable sulphur 50 WP
C. Carbofuran 3% G
D. NSKE 5%
Answer: B

Q8. Which pest causes silvery streaks on tomato leaves and is a vector of tomato spotted wilt virus?
A. Aphis gossypii
B. Thrips tabaci
C. Tetranychus spp
D. Liriomyza trifolii
Answer: B

Q9. Which of the following is NOT a recommended insecticide for whitefly control on tomato?
A. Dimethoate 30% EC
B. Malathion 50% EC
C. Thiamethoxam 25% WG
D. Flubendiamide 20 WG
Answer: D

Q10. What is the color of the adult red spider mite?
A. Yellow
B. Green
C. Red
D. Brown
Answer: C

Ppt on Key Insect Pests Affecting Tomato And Their Control Methods

This presentation provides an overview of major insect pests affecting tomato crops, focusing on their identification, nature of damage, life cycle, and management strategies. Emphasis is placed on integrated pest management, including biological, cultural, and chemical control methods. Key pests discussed include the tomato fruit borer, serpentine leaf miner, whitefly, aphids, thrips, and red spider mite. The content is essential for understanding pest dynamics, crop protection, and sustainable tomato production. Important academic keywords include pest identification, life cycle, damage symptoms, integrated pest management, and chemical control.
Introduction to Tomato Pests
  • Tomato is susceptible to several insect pests causing significant yield loss.
  • Pests affect all growth stages: seedling, vegetative, flowering, and fruiting.
  • Effective management requires correct identification and integrated approaches.
Tomato Fruit Borer (Helicoverpa armigera)
Family: Noctuidae
Order: Lepidoptera
Distribution: Tropics, subtropics, and warmer temperate regions.
Identification:

  • Caterpillars: Varying colors, radiating hairs, brown to greenish with dark lines.
  • Moth: Stout, light yellowish-brown, forewings with dark spot, hindwings smoky white.
Tomato Fruit Borer – Life Cycle and Damage
Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval stage: 18–25 days, pupates in soil.
  • Total life cycle: 30–40 days.

Nature of Damage:

  • Young larvae feed on foliage; older larvae bore into fruits.
  • Circular holes in fruits; internal feeding causes rotting.
  • One larva can damage multiple fruits.
Tomato Fruit Borer – Management
  • Collect and destroy infested fruits and larvae.
  • Intercrop with marigold (1:16 rows) to attract egg-laying adults.
  • Deep ploughing after harvest exposes pupae to predators.
  • Install pheromone traps (Helilure) at 12/ha.
  • Use resistant varieties: Rupali, Roma, Pusa Red Plume.
  • Spray Bacillus thuringiensis (2g/lit).
  • Release Trichogramma pretiosum or T. chilonis for egg parasitism.
  • Spray HaNPV @ 250 LE/ha for larval control.
  • Release Chrysoperla carnea larvae for biological control.

Chemical Control:

  • Azadirachtin 1% EC: 2 ml/lit
  • Indoxacarb 14.5% SC: 8 ml/10 lit
  • Flubendiamide 20 WG: 5 g/10 lit
  • Novaluron 10% EC: 7.5 ml/10 lit
  • Phosalone 35% EC: 13 ml/10 lit
  • Quinalphos 25% EC: 1 ml/lit
Serpentine Leaf Miner (Liriomyza trifolii)
Family: Agromyzidae
Order: Diptera
Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Pupa: Yellowish-brown, found in soil or leaves.
  • Adult: Pale yellow, small fly.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; total cycle ~3 weeks.

Nature of Damage:

  • Maggots mine between leaf epidermal layers.
  • Serpentine mines visible; severe cases cause leaf drying and drop.

Management:

  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
Tomato Leaf Miner (Tuta absoluta)
Family: Gelechiidae
Order: Lepidoptera
Identification:

  • Small greyish-brown moth; larvae mine leaves, stems, and fruits.

Nature of Damage:

  • Leaf mining, fruit boring, and stem tunneling.
  • Leads to leaf necrosis, fruit rot, and yield loss.

Management:

  • Use pheromone traps for monitoring and mass trapping.
  • Remove and destroy infested plant parts.
  • Apply Bacillus thuringiensis or recommended insecticides.
Whitefly (Bemisia tabaci)
Family: Aleyrodidae
Order: Hemiptera
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish-white.
  • Adults: Tiny, white, scale-like.

Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy diseased plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Install yellow sticky traps (12/ha).
  • Apply carbofuran 3% G @ 40 kg/ha or recommended insecticides.

Chemical Control:

  • Dimethoate 30% EC: 1 ml/lit
  • Malathion 50% EC: 1.5 ml/lit
  • Oxydemeton-methyl 25% EC: 1 ml/lit
  • Thiamethoxam 25% WG: 4 ml/10 lit
Aphids (Aphis gossypii, Myzus persicae)
Family: Aphididae
Order: Hemiptera
Nature of Damage:

  • Nymphs and adults suck sap from leaves and stems.
  • Infested plants become yellow, deformed, and may dry up.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
Thrips (Thrips tabaci)
Family: Thripidae
Order: Thysanoptera
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark, fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, flower drop, bud necrosis.
  • Vector of tomato spotted wilt virus.

Management:

  • Uproot and destroy diseased plants.
  • Install yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton 25 EC or dimethoate 30 EC @ 1 lit/ha.
Red Spider Mite (Tetranychus spp.)
Family: Tetranychidae
Order: Acarina
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves turn reddish-brown, bronzed, and dry.
  • Webbing on leaves; severe cases affect flowering and fruiting.

Management:

  • Spray wettable sulphur 50 WP (2g/lit).
  • Spray dicofol 18.5 EC (2.5 ml/lit).
Summary: Integrated Pest Management in Tomato
  • Accurate pest identification is crucial for effective management.
  • Combine cultural, biological, and chemical methods for sustainable control.
  • Monitor pest populations using traps and field scouting.
  • Use resistant varieties and timely interventions to minimize losses.

Objective Questions

Q1. Which family does the Tomato Fruit Borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Aleurodidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato seedlings for managing Tomato Fruit Borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide and dose is recommended for controlling Tomato Fruit Borer using Flubendiamide?
A. 8 ml/10 lit
B. 5 g/10 lit
C. 7.5 ml/10 lit
D. 13 ml/10 lit
Answer: B

Q4. Which pest is identified by minute orange yellowish apodous maggots as larvae?
A. Helicoverpa armigera
B. Liriomyza trifolii
C. Tuta absoluta
D. Bemisia tabaci
Answer: B

Q5. Which pest acts as a vector for tomato leaf curl disease?
A. Aphis gossypii
B. Thrips tabaci
C. Bemisia tabaci
D. Tetranychus spp
Answer: C

Q6. Which control measure is specifically recommended for Thrips tabaci management?
A. Spray wettable sulphur 50 WP
B. Use yellow sticky traps @ 15/ha
C. Spray Bacillus thuringiensis
D. Release Trichogramma pretiosum
Answer: B

Q7. What is the recommended dose of Dimethoate 30% EC for whitefly control?
A. 1.0 ml/lit
B. 1.5 ml/lit
C. 4.0 ml/10 lit
D. 2.0 ml/lit
Answer: A

Q8. Which pest is managed by spraying wettable sulphur 50 WP at 2g/lit?
A. Tuta absoluta
B. Thrips tabaci
C. Tetranychus spp
D. Liriomyza trifolii
Answer: C

Q9. Which natural enemy is recommended for release at 50,000 eggs/ha from 30 days after planting for Tomato Fruit Borer management?
A. Trichogramma pretiosum
B. Trichogramma chilonis
C. Chrysoperla carnea
D. Bacillus thuringiensis
Answer: C

Q10. Which pest's nymphs and adults secrete honeydew that leads to sooty mould growth on tomato plants?
A. Bemisia tabaci
B. Aphis gossypii
C. Tetranychus spp
D. Thrips tabaci
Answer: B

Ppt on Major Insect Pests Of Tomato And Their Management

This presentation covers the major insect pests of tomato, focusing on their identification, biology, nature of damage, and management strategies. Emphasis is placed on the economic impact, life cycles, and integrated pest management (IPM) approaches. Key pests discussed include the tomato fruit borer, serpentine leaf miner, whitefly, aphids, thrips, and red spider mite. The content is essential for understanding pest dynamics, crop protection, and sustainable tomato production. Important academic keywords include Helicoverpa armigera, integrated pest management, vector, life cycle, and economic importance.
Introduction to Tomato Pests
  • Tomato is affected by several insect pests causing significant yield losses.
  • Pests damage leaves, stems, flowers, and fruits, reducing quality and market value.
  • Effective management requires knowledge of pest identification, biology, and control methods.
  • Integrated pest management (IPM) is recommended for sustainable control.
Tomato Fruit Borer (<em>Helicoverpa armigera</em>)
Pathogen: Helicoverpa armigera (Family: Noctuidae, Order: Lepidoptera)
Economic Importance:

  • Major pest of tomato; also attacks tur, gram, and other crops.
  • Widely distributed in tropical and subtropical regions.

Identification:

  • Caterpillar: Varying color, radiating hairs, brown to greenish with dark lines.
  • Moth: Stout, light yellowish-brown, forewings with dark spot, hindwings smoky white with black border.

Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval period: 18–25 days; pupates in soil.
  • Total life cycle: ~30–40 days.

Nature of Damage:

  • Larvae bore circular holes in fruits, feed on inner contents.
  • Secondary infection by fungi and bacteria common.
  • One larva can damage multiple fruits.
Tomato Fruit Borer – Management
  • Collect and destroy infested fruits and larvae.
  • Intercrop tomato with marigold (1:16 rows) to attract and trap adults.
  • Plough fields post-harvest to expose and destroy pupae.
  • Install pheromone traps (Helilure) at 12/ha.
  • Grow resistant varieties (e.g., Rupali, Roma, Pusa Red Plume).
  • Spray Bacillus thuringiensis 2g/litre.
  • Release Trichogramma pretiosum or T. chilonis for egg parasitism.
  • Spray HaNPV @ 250 LE/ha for biological control.
  • Release Chrysoperla carnea larvae for predator control.

Chemical Control:

  • Azadirachtin 1% EC: 2 ml/litre
  • Indoxacarb 14.5% SC: 8 ml/10 litres
  • Flubendiamide 20 WG: 5 g/10 litres
  • Novaluron 10% EC: 7.5 ml/10 litres
  • Phosalone 35% EC: 13 ml/10 litres
  • Quinalphos 25% EC: 1 ml/litre
Serpentine Leaf Miner (<em>Liriomyza trifolii</em>)
Pathogen: Liriomyza trifolii (Family: Agromyzidae, Order: Diptera)
Identification:

  • Larva: Minute, orange-yellow, legless maggots.
  • Pupa: Yellowish-brown, found in soil or leaves.
  • Adult: Small, pale yellow flies.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; pupates in soil or leaves.
  • Total life cycle: ~3 weeks.

Nature of Damage:

  • Maggots mine between leaf epidermal layers, creating serpentine trails.
  • Severe infestation causes leaf drying and drop.

Management:

  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
Tomato Leaf Miner (<em>Tuta absoluta</em>)
Pathogen: Tuta absoluta (Family: Gelechiidae, Order: Lepidoptera)
Identification:

  • Small grey-brown moth; larvae are cream to greenish with dark head.

Nature of Damage:

  • Larvae mine leaves, stems, and fruits, causing blotches and galleries.
  • Fruit damage leads to secondary infections and yield loss.

Management:

  • Use pheromone traps for monitoring and mass trapping.
  • Remove and destroy infested plant parts.
  • Apply biologicals (e.g., Bacillus thuringiensis).
  • Use selective insecticides as per recommendations.
Whitefly (<em>Bemisia tabaci</em>)
Pathogen: Bemisia tabaci (Family: Aleyrodidae, Order: Hemiptera)
Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish-white.
  • Adults: Tiny, white, scale-like insects.

Nature of Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.

Management:

  • Uproot and destroy diseased plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran 3% G @ 40 kg/ha or recommended insecticides.

Chemical Control:

  • Dimethoate 30% EC: 1 ml/litre
  • Malathion 50% EC: 1.5 ml/litre
  • Oxydemeton-methyl 25% EC: 1 ml/litre
  • Thiamethoxam 25% WG: 4 ml/10 litres
Aphids (<em>Aphis gossypii</em>, <em>Myzus persicae</em>)
Pathogen: Aphis gossypii, Myzus persicae (Family: Aphididae, Order: Hemiptera)
Nature of Damage:

  • Nymphs and adults suck sap from leaves and stems.
  • Plants turn yellow, become deformed, and may dry up.
  • Honeydew secretion promotes sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
  • Spray recommended systemic insecticides if needed.
Thrips (<em>Thrips tabaci</em>)
Pathogen: Thrips tabaci (Family: Thripidae, Order: Thysanoptera)
Identification:

  • Nymphs: Yellowish.
  • Adults: Dark with fringed wings.

Nature of Damage:

  • Silvery streaks on leaves, premature flower drop, bud necrosis.
  • Vector of tomato spotted wilt virus.

Management:

  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton 25 EC or dimethoate 30 EC @ 1 litre/ha.
Red Spider Mite (<em>Tetranychus</em> spp.)
Pathogen: Tetranychus spp. (Family: Tetranychidae, Order: Acarina)
Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish.
  • Adults: Small, red.

Nature of Damage:

  • Leaves become reddish-brown, bronzed, and dry.
  • Webbing on leaves; severe infestations reduce flower and fruit set.

Management:

  • Spray wettable sulphur 50 WP @ 2 g/litre.
  • Spray dicofol 18.5 EC @ 2.5 ml/litre.
Summary: Integrated Pest Management in Tomato
  • Monitor pest populations regularly using traps and field scouting.
  • Adopt cultural, mechanical, biological, and chemical control methods in combination.
  • Use resistant varieties and maintain field hygiene.
  • Apply pesticides judiciously to avoid resistance and residue problems.
  • Promote natural enemies and minimize ecological disruption.

Objective Questions

Q1. Which family does the tomato fruit borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Thripidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato seedlings for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide and dose is recommended for chemical control of whitefly on tomato?
A. Indoxacarb 8 ml/10 lit
B. Dimethoate 1.0 ml/lit
C. Flubendiamide 5 g/10 lit
D. Azadirachtin 2.0 ml/lit
Answer: B

Q4. Which pest is a vector of tomato leaf curl disease?
A. Tuta absoluta
B. Bemisia tabaci
C. Liriomyza trifolii
D. Aphis gossypii
Answer: B

Q5. What is the scientific name of the serpentine leaf miner?
A. Tuta absoluta
B. Liriomyza trifolii
C. Helicoverpa armigera
D. Thrips tabaci
Answer: B

Q6. Which biological control agent is released at 1 lakh/ha for tomato fruit borer management?
A. Chrysoperla carnea
B. Trichogramma pretiosum
C. Trichogramma chilonis
D. Bacillus thuringiensis
Answer: B

Q7. Which pest's larvae are described as minute orange yellowish apodous maggots?
A. Tomato fruit borer
B. Serpentine leaf miner
C. Red spider mite
D. Aphids
Answer: B

Q8. Which chemical is recommended at 2g/lit for controlling red spider mite?
A. Dicofol 18.5 EC
B. Wettable sulphur 50 WP
C. Flubendiamide 20 WG
D. Novaluron 10% EC
Answer: B

Q9. Which pest is identified by dark coloured adults with fringed wings?
A. Aphids
B. Thrips
C. Whitefly
D. Red spider mite
Answer: B

Q10. Which pest causes silvery streaks on tomato leaf surfaces and is a vector of tomato spotted wilt virus?
A. Thrips tabaci
B. Bemisia tabaci
C. Tetranychus spp
D. Myzus persicae
Answer: A

Ppt on Major Insect Pests Of Tomato And Their Management Strategies

This presentation provides an overview of major insect pests affecting tomato crops, focusing on their identification, nature of damage, life cycle, and integrated management strategies. Emphasis is placed on the economic impact, pest biology, and effective control measures, including biological, cultural, and chemical methods. Key topics include the tomato fruit borer, leaf miner, whitefly, aphids, thrips, and red spider mite, which are critical for understanding pest management in tomato cultivation. Important academic keywords include pest identification, life cycle, damage symptoms, integrated pest management, and chemical control.
Introduction to Tomato Pests
  • Tomato is susceptible to several insect pests causing significant yield loss.
  • Major pests include fruit borer, leaf miner, whitefly, aphids, thrips, and red spider mite.
  • Effective management requires correct identification and understanding of pest biology.
Tomato Fruit Borer (Helicoverpa armigera)
Taxonomy:

  • Family: Noctuidae; Order: Lepidoptera

Economic Importance:

  • Serious pest in tropical and subtropical regions.
  • Damages tomato, tur, gram, and other crops.

Identification:

  • Caterpillar: Varying color, radiating hairs, brown to greenish with dark lines.
  • Moth: Medium-sized, light yellowish brown, forewings with dark spot, hindwings pale with black border.
Tomato Fruit Borer – Life Cycle & Damage
Life Cycle:

  • Eggs laid on tender plant parts.
  • Larval stage lasts 18–25 days; pupates in soil.
  • Total life cycle: 30–40 days.

Nature of Damage:

  • Young larvae feed on foliage; older larvae bore into fruits.
  • Circular holes in fruits; internal feeding leads to secondary infections.
  • One larva can damage 2–8 fruits.
Tomato Fruit Borer – Management
Cultural & Mechanical:

  • Collect and destroy infested fruits and larvae.
  • Deep ploughing after harvest to expose pupae.
  • Intercrop with marigold (1:16 rows) to attract adults.

Biological:

  • Release Trichogramma spp. and Chrysoperla carnea.
  • Spray Bacillus thuringiensis (2g/lit) or HaNPV (250 LE/ha).

Chemical:

  • Use pheromone traps (Helilure) at 12/ha.
  • Spray recommended insecticides: Azadirachtin, Indoxacarb, Flubendiamide, Novaluron, Phosalone, Quinalphos.
Serpentine Leaf Miner (Liriomyza trifolii)
Taxonomy:

  • Family: Agromyzidae; Order: Diptera

Identification:

  • Larva: Minute, orange-yellow, apodous maggots.
  • Adult: Pale yellow, small fly.

Life Cycle:

  • Eggs laid singly on upper leaf surface.
  • Larval period: 7–10 days; pupates in soil or leaves.
  • Total life cycle: ~3 weeks.

Damage:

  • Larvae mine between leaf epidermis, causing serpentine trails.
  • Severe cases cause leaf drying and drop.
Serpentine Leaf Miner – Management
  • Collect and destroy mined leaves.
  • Spray neem seed kernel extract (NSKE) 5%.
  • Practice crop rotation and avoid overuse of insecticides to conserve natural enemies.
Tomato Leaf Miner (Tuta absoluta)
Taxonomy:

  • Family: Gelechiidae; Order: Lepidoptera

Identification:

  • Small, greyish-brown moth; larvae mine leaves, stems, and fruits.

Damage:

  • Leaf mines, galleries in stems, and fruit damage.
  • Can cause severe yield loss if unmanaged.

Management:

  • Use pheromone traps for monitoring.
  • Release natural enemies (Trichogramma spp.).
  • Apply Bacillus thuringiensis or selective insecticides as needed.
Whitefly (Bemisia tabaci)
Taxonomy:

  • Family: Aleyrodidae; Order: Hemiptera

Identification:

  • Eggs: Pear-shaped, light yellow.
  • Nymphs: Oval, scale-like, greenish white.
  • Adults: Tiny, white, scale-like.

Damage:

  • Nymphs and adults suck sap, causing chlorosis and leaf curling.
  • Vector of tomato leaf curl virus.
Whitefly – Management
  • Uproot and destroy infected plants.
  • Remove alternate weed hosts (e.g., Abutilon indicum).
  • Use yellow sticky traps (12/ha).
  • Apply carbofuran 3% G @ 40 kg/ha or recommended insecticides: Dimethoate, Malathion, Oxydemeton-methyl, Thiamethoxam.
Aphids (Aphis gossypii, Myzus persicae)
Taxonomy:

  • Family: Aphididae; Order: Hemiptera

Identification:

  • Small, soft-bodied insects, green or black.

Damage:

  • Nymphs and adults suck sap, causing yellowing, deformation, and drying.
  • Honeydew secretion leads to sooty mould, reducing photosynthesis.

Management:

  • Seed treatment with imidacloprid or thiamethoxam.
  • Use yellow sticky traps.
  • Encourage natural predators (ladybird beetles, lacewings).
Thrips (Thrips tabaci)
Taxonomy:

  • Family: Thripidae; Order: Thysanoptera

Identification:

  • Nymphs: Yellowish; Adults: Dark with fringed wings.

Damage:

  • Silvery streaks on leaves, bud necrosis, flower drop.
  • Vector of tomato spotted wilt virus.

Management:

  • Uproot and destroy diseased plants.
  • Use yellow sticky traps (15/ha).
  • Release Chrysoperla carnea larvae (10,000/ha).
  • Spray methyl demeton or dimethoate as needed.
Red Spider Mite (Tetranychus spp.)
Taxonomy:

  • Family: Tetranychidae; Order: Acarina

Identification:

  • Eggs: Hyaline, globular, laid in masses.
  • Nymphs: Yellowish; Adults: Small, red.

Damage:

  • Leaves turn reddish-brown, bronzed, and dry.
  • Webbing on leaves; reduced flower and fruit set.

Management:

  • Spray wettable sulphur 50 WP (2g/lit) or dicofol 18.5 EC (2.5 ml/lit).
Summary: Integrated Pest Management in Tomato
  • Combine cultural, biological, and chemical methods for effective pest control.
  • Monitor pest populations regularly using traps and field scouting.
  • Promote use of resistant varieties and natural enemies.
  • Apply insecticides judiciously to avoid resistance and conserve beneficial insects.

Objective Questions

Q1. Which family does the tomato fruit borer, Helicoverpa armigera, belong to?
A. Noctuidae
B. Gelechidae
C. Agromyzidae
D. Aleurodidae
Answer: A

Q2. What is the recommended ratio of American tall marigold to tomato rows for managing tomato fruit borer?
A. 1:10
B. 1:16
C. 1:20
D. 1:25
Answer: B

Q3. Which insecticide is recommended at a dose of 7.5 ml/10 lit for tomato fruit borer control?
A. Indoxacarb
B. Flubendiamide
C. Novaluron
D. Phosalone
Answer: C

Q4. Which pest is identified by minute orange yellowish apodous maggots as larvae?
A. Tomato fruit borer
B. Serpentine leaf miner
C. Whitefly
D. Aphids
Answer: B

Q5. Which pest is a vector of tomato leaf curl disease?
A. Thrips tabaci
B. Bemisia tabaci
C. Liriomyza trifolii
D. Tuta absoluta
Answer: B

Q6. Which control measure is NOT recommended for aphid management in tomato?
A. Seed treatment with imidachloprid
B. Use of yellow sticky trap
C. Spray methyl demeton
D. Thiamethoxam 5 kg/seed
Answer: C

Q7. Which pest causes silvery streaks on leaf surface and is a vector of tomato spotted wilt virus?
A. Red spider mite
B. Thrips tabaci
C. Whitefly
D. Aphids
Answer: B

Q8. Which chemical is recommended at 2g/lit for controlling red spider mite?
A. Dicofol 18.5 EC
B. Wettable sulphur 50 WP
C. Dimethoate 30% EC
D. Malathion 50% EC
Answer: B

Q9. Which order does the tomato leaf miner, Tuta absoluta, belong to?
A. Hemiptera
B. Diptera
C. Lepidoptera
D. Thysonoptera
Answer: C

Q10. Which pest's nymphs and adults suck sap, causing yellowing and deformation of tomato plants?
A. Whitefly
B. Aphids
C. Thrips
D. Red spider mite
Answer: B
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