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Agritech Archive

Production · Protection · Nutrients · Water
In here
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

Symptoms of Damage

Cotton
Symptoms of Damage Downward curling and reddening of leaves. Under severe infestation turn brick red colour. Growth retardation and death of plants. Identification Characters and Biology Destructive Stage: Nymphs and adults. Eggs: Small, delicate and translucent. Egg period: 5 to 15 days Nymph - Light green, translucent, wingless found between the veins of leaves on the under surface Adult - Green, wedge shaped leafhopper.
Hopper burnLeaf hopper AdultL eaf hopper Nymph
  • Downward curling and reddening of leaves.
  • Under severe infestation turn brick red colour.
  • Growth retardation and death of plants.

Identification Characters and Biology

  • Destructive Stage: Nymphs and adults.
  • Nymph - Light green, translucent, wingless found between the veins of leaves on the under surface
  • Adult - Green, wedge shaped leafhopper.

Management

  • ETL : 50 nymphs or adults / 50 leaves
  • Cultivate of hairy (hirsute) varieties of cotton
  • Adopt synchronised sowing.
  • Treat seeds with Beauveria bassiana @ 10 g/kg.
  • Apply nitrogenous fertilizers judiciously.
  • Maintain weed free condition in field .
  • Spray any one of the following insecticides when pest population reaches ETL: Imidacloprid 17.8% SL 40 – 50 ml/acre or Azadirachtin 0.03%WSP or Buprofezin 25%SC 400 ml/acre or Diafenthiuron 50%WP 240 g/acre or Thiacloprid 21.7%SC 40-50 ml/acre or Flonicamid 50% WG 60 g/acre or Thiamethoxam 25% WG 40 g/acre.