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Ppt on Cultivating Dendrobium Orchids Guide

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This presentation covers the protected cultivation of orchids, specifically the Dendrobium species. Key aspects include propagation, growing conditions, and post-harvest handling techniques.
Introduction to Dendrobium Orchids
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  • Dendrobiums are native to Southeast Asia.
  • They thrive in tropical climates with high humidity.
  • Suitable for coastal areas like Chennai.
Varieties of Dendrobium Orchids
  • Sonia-17: Purple and white flowers.
  • Sonia-28: Popular for its vibrant blooms.
  • Emma White: Known for its elegance.
  • Sakura Pink: Aesthetic pink variety.
Growing Environment
  • Requires 75% shade netting.
  • Ideal humidity: 70-80%.
  • Day temperature: 21-29°C; Night: 18-21°C.
  • Rainshelter needed in high rainfall zones.
Propagation Methods
  • Division of clumps and keikis.
  • Utilization of back bulbs.
  • Tissue culture for mass propagation.
Irrigation and Nutrients
  • Mist or overhead sprinklers for humidity.
  • Foliar NPK application: 20:10:10 @ 0.2% weekly.
Growth Regulators and Repotting
  • GA3 foliar application at 50 ppm bi-monthly.
  • Repot every 2-3 years or when necessary.
  • Best time to repot: when new roots emerge.
Harvesting Techniques
  • Harvest when 75% of flowers are open.
  • Cut lower 0.75cm of the peduncle post-harvest.
  • Yield: 8-10 spikes per plant annually.
Post-Harvest Handling
  • Pulsing: 8-HQC 500 ppm + Sucrose 5% for 12 hrs.
  • Holding solution: AgNO3 25 ppm + 8-HQC 400 ppm.
  • Wrap with 50 gauge polythene.
Pests and Diseases
  • Handpick snails and slugs.
  • Bacterial diseases treated with Streptomycin.
  • Fungal issues managed with Metalaxyl.
Conclusion
  • Effective management ensures healthy orchid growth.
  • Regular monitoring for pests and diseases is crucial.
  • Thank you for your attention!
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