Symptoms of damage

• Nymphs and adults suck the sap from leaflets, stem and pods.
• The young leaves of seedlings become twisted
• Aphids secretes honeydew during feeding which attracts honeydew
• Excessive feeding leads to yellowing and wilting
• It transmits cucumber mosaic virus in greengram

Identification of the pest

• The adults are black and shiny, upto 2 mm long and some are winged.
• Nymphs are covered with waxy coating.
• Nymphal period is 5–8 days
• Total life cycle - 11–14 days.

Management

• Install yellow stocky traps (@ 5/ac) to reduce the aphid population
• Ladybird beetles (Coccinellaseptempunctata, Brumussuturalisand Harmonia dimidiata) and green lacewings (Chrysoperlazastrowi) are efficient predators to reduce population of aphids
• Spray with 5% crude neem extract or 2% neem oil 3000 ppm
• Spray any one of the following insecticides
• Thiamethoxam 25 % WG @ 40 g/ac
• Imidacloprid 17.80 % SL @ 40 ml/ac
• Acetamiprid 20 % SP @ 20 g/ac
• Buprofezin 25 % SC@ 400 ml/ac