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Pest Management: Symptoms

Sorghum  -  Ear Head caterpillar: Helicoverpa armigera

Pest management
Pest management
Symptoms of Damage: 
 Earheads are partially eaten with chalky appearance.
 Feacal pellets are visible within the ear heads.
Identification of Pest: 
 Eggs -Spherical in shape and creamy white in colour, laid singly
 Larva -Shows colour variation from greenish to brown. It has dark brown grey lines on the body with lateral white lines
 Pupa -Brown in colour, occurs in soil, leaf, pod and crop debri
 Adult - Light pale brownish yellow stout moth, Forewings are olive green to pale brown with a dark brown circular spot in the centre and Hind wings are pale smoky white with a broad blackish outer margin.
 ETL:2 /earhead
 Set up of light traps till mid night to monitor, attract and kill adults of stem borer, grain midge and earhead caterpillars.
 Set up sex pheromone traps at 12/ha to attract male moths ofHelicoverpa armigerafrom flowering to grain hardening. Two applications of NPV at 10 days interval at 1.5 X1012 POB along with crude sugar 2.5kg + cotton seed kernel powder 250 g on the earheads is effective in reducing the larval population ofHelicoverpa
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