Symptoms of damage:
- Central shoot dries leading to dead heart
- Young larva feeds tender folded leaves causing “shot hole” symptom.
- Old larvae bores stem and feeds on internal tissues.
- Bore holes and tunneling noticed on stem.
Identification of the pest:
- Yellowish brown larva with brown head
- Straw coloured moths
Management:
- Inter-crop maize with cowpea in 2:1 ratio.
- Release egg parasitoid, Trichogramma chilonis @ 2,50,000 /ha thrice at weekly intervals.
- When infestation crosses 10%, spray dimethoate 30EC 660 ml/ha or chlorantraniliprole 18.5 SC @150 ml/ha
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| Elongated windows |
Bore hole |
Dead heart |
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| Larva and Pupa |
Moth |
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| Egg mass |
Larva |
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| Larva and Pupa |
Female and male moth |
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