Agritech Archive
Loading
Agritech ArchiveSkip to main contentAbout this archive
Text size
Crop guidance, searchable

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

Black And Green Gram
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
On leavesOn stem, flowers & pods
Coccinellids feeding on aphid
  • 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