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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

Symptom of damage

Cotton
Cotton aphid: Aphis gossypii (Aphididae: Hemiptera)
Symptom of damage Leaves are shiny with honeydew or darkened by sooty mould growing on the honeydew. Crumpling and downward curling observed under severe attack. Activity of ants on the aphid-infested plants is common. Contamination of lint with honeydew and associated fungi leads to poor quality cotton. Identification characters and biology Destructive stage: Nymphs and adults. Reproduction by parthenogenesis and viviparity. Nymphs: Small, yellowish or brownish in colour and mostly wingless. Nymphal period: 7-9 days. Adults: Yellowish brown to black with black cornicles and yellowish green abdominal tip. Adult longevity: 12-20 days. Management ETL: 15% of infested plant Integrated management Avoid late sowing. Treat seeds with Beauveria bassiana @ 10 g/kg. Apply nitrogenous fertilizers judiciously. Grow cowpea as intercrop or on the bunds to increase the natural enemy build up. Spray any one of the following insecticides when pest population reaches ETL: Imidacloprid 17.8% SL 40 – 50 ml/acre or Azadirachtin 0.03% EC 1000 ml/acre 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
  • Leaves are shiny with honeydew or darkened by sooty mould growing on the honeydew.
  • Crumpling and downward curling observed under severe attack.
  • Activity of ants on the aphid-infested plants is common.
  • Contamination of lint with honeydew and associated fungi leads to poor quality cotton.

Identification characters and biology

  • Destructive stage: Nymphs and adults.
  • Reproduction by parthenogenesis and viviparity.
  • Nymphs: Small, yellowish or brownish in colour and mostly wingless. Nymphal period: 7-9 days.
  • Adults: Yellowish brown to black with black cornicles and yellowish green abdominal tip. Adult longevity: 12-20 days.

Management

  • ETL: 15% of infested plant

Integrated management

  • Avoid late sowing.
  • Treat seeds with Beauveria bassiana @ 10 g/kg.
  • Apply nitrogenous fertilizers judiciously.
  • Grow cowpea as intercrop or on the bunds to increase the natural enemy build up.
  • Spray any one of the following insecticides when pest population reaches ETL: Imidacloprid 17.8% SL 40 – 50 ml/acre or Azadirachtin 0.03% EC 1000 ml/acre 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