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Production · Protection · Nutrients · Water
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1,513 crop protection pages, pest and disease by crop•98 crops tagged — rice, cotton, sugarcane, mango and more•261 nutrient management pages, deficiency symptoms and correction measures•3,462 data tables preserved from the source pages

Scales: Diaspis boisduvali , Aspidiotus destructor

Orchids
Scales: Diaspis boisduvali , Aspidiotus destructor Symptom of damage Nymphs and adults suck the sap from leaves It damages both leaves and pseudobulbs Honey dew excretion causes development of sooty mould fungus Yellowing of leaves Wither and dry up It is the common armoured scale found on cattleya and cymbidium. Management The root extract of plant Derris is recommended. Spraying of fish oil rosin soap at 15 gms per lit of water. Field release of green lace wing larvae Chrysoperla carnea Conserve the predatory Lady bird beetles Cryptolaemus montrouzieri , Scymnus sp. Spraying of malathion 50 EC or phosalone 35 EC or methyl demeton 25 EC @ 1 ml/l

Symptom of damage

  • Nymphs and adults suck the sap from leaves
  • It damages both leaves and pseudobulbs
  • Honey dew excretion causes development of sooty mould fungus
  • Yellowing of leaves
  • Wither and dry up
  • It is the common armoured scale found on cattleya and cymbidium.

Management

  • The root extract of plant Derris is recommended.
  • Spraying of fish oil rosin soap at 15 gms per lit of water.
  • Field release of green lace wing larvae Chrysoperla carnea
  • Conserve the predatory Lady bird beetles Cryptolaemus montrouzieri , Scymnus sp.
  • Spraying of malathion 50 EC or phosalone 35 EC or methyl demeton 25 EC @ 1 ml/l