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Crop Protection :: Pest of Sorghum

Sorghum midge: Contarinia sorghicola
Symptom of damage:
  • Pollen shedding due to egg laying
  • White pupal cases protruding out from the grains
  • Chaffy grains with holes
 
  Stages of infection Severely damaged earhead Contarinia sorghicola
Identification of the pest:
  • Adult:  Fly is small, fragile with a bright orange abdomen and a pair of transparent wings

Management:

  • Set up of light traps till mid night to monitor, attract and kill adults of stem borer, grain midge and earhead caterpillars.
  • Apply any one of the following on 3rd and 18th day after panicle emergence
    • Carbaryl 10 D 25 kg/ha
    • Malathion 5 D 25 kg/ha
    • Phosalone 4 D 25 kg/ha
  • Neem seed kernel extract 5% (or) Spray malathion 50 EC @ 1600 ml/ha or phosalone 1150 ml/ha
  • The sowing of sorghum should be completed in as short a time as possible to avoid continuous flowering which favours grain midge and earhead bug multiplication in an area
Source of images:
http://www.grdc.com.au/Research-and-Development/Major-Initiatives/The-Sorghum-Midge-Tested-Scheme
http://www.mississippi-crops.com/2013/07/09/managing-insect-pest-in-mississippi-grain-sorghum/

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