Cotton aphid: Aphis gossypii
Symptom of damage:
- Infesting tender shoots and under surface of the leaves
- Curling and crinkling of leaves
- Stunted growth
- Blighted appearance when infestation is severe
- Development of black sooty mould due to the excretion of honey dew giving the plant a dark appearance
Identification of the pest:
- Nymphs – Yellowish or greenish brown found on the undersurface of leaves
- Adults – Greenish-brown, soft-bodied and small insects
- Winged forms may be seen under crowded conditions
Management:
- ETL: 15% of infested plant
- Spray any one of the following insecticides (500 l spray fluid/ha)
- Methyl demeton 25 EC 500ml/ha
- Dimethoate 30 EC 500ml/ha
- Acetamiprid 20% SP 50 g/ha
- Azadirachtin 0.03% EC 500 ml/ha
- Buprofezin 25% SC1000 ml/ha
- Carbosulfan 25%DS 60g/kg of seed
- Chlorpyrifos 20% EC 1250 ml/ha
- Diafenthiuron 50% WP 600 ml/ha
- Dimethoate 30% EC 660 ml/ha
- Fipronil 5% SC 1500-2000 ml/ha
- Imidacloprid 70% WG 30-35 kg/ha
- Imidacloprid 17.8% SL 100 -125 ml/ha
- Malathion 50% EC 1000 ml/ha
- Methyl demeton 25% EC 1200 ml/ha
- Profenofos 50% EC 1000 ml/ha
- Thiacloprid 21.7% SC 100-125 ml/ha
- Thiamethoxam 25% WG 100 g/ha.
Source-
- TamilNadu Agritech Portal
