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Pest Management: Symptoms

Maize  -  Corn worm or Earworm: Helicoverpa armigera

Pest management
Symptoms of Damage: 
 Larva feeds on silk and developing grains
Identification of Pest: 
 Larva - Shows colour variation from greenish to brown
 Adult - Light pale brownish yellow stout moth,Forewings are olive green to pale brown with a dark brown circular spot in the center. Hind wings are pale smoky white with a broad blackish outer margin.
 Eggs - Spherical in shape and creamy white in colour, laid singly ,It has dark brown grey lines on the body with lateral white lines
 Pupa - Brown in colour, occurs in soil, leaf, pod and crop debris
Management: 
 Set up of light traps
 Set up sex pheromone traps at 12/ha
 Two applications of NPV at 10 days interval at 1.5 X1012POB along with crude sugar 2.5 kg + cotton seed kernel powder 250 g on the ear heads
 Apply any one of the followingon 18th day after panicle emergence
 Carbaryl 10 D 25 kg/ha
 Malathion 5 D 25 kg/ha
 Phosalone 4 D 25 kg/ha
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