Corn worm/Earworm: Helicoverpa armigera
Symptom of damage:
- Larva feeds on silk and developing grains
Identification of the pest:
- Eggs: Spherical in shape and creamy white in colour
- 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 debris
- Adult: Light pale brownish yellow stout moth. Forewings are olive green to pale brown with a dark brown circular spot in the centre. Hind wings are pale smoky white with a broad blackish outer margin.
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 X1012 POB along with crude sugar 2.5 kg + cotton seed kernel powder 250 g on the ear heads
- Apply any one of the followings on 18th day after panicle emergence
- Carbaryl 10 D 25 kg/ha
- Malathion 5 D 25 kg/ha
- Phosalone 4 D 25 kg/ha
Source-
- TNAU Agritech Portal
