Pest Management: Symptoms
Sorghum - Stem borer: Chilo partellus
- Symptoms of Damage:
Withering and drying of central shoot - DEAD HEART
Red mining in the midrib
Bore holes visible on the stem near the nodes
Tender folded leaves have parallel SHOT HOLE
Affected parts of stem may show internally tunneling of caterpillars
- Identification of Pest:
Egg - Scale-like flat oval eggs in batches on the under surface of leaves near the midribs.
Larva - Yellowish brown with a brown head and prothoracic shield.
Adult - Moth is medium size, straw coloured.
Dead hearts should be pulled out and used as fodder (or) burried in manure pits.
Stubbles should be ploughed up during winter and burnt to destroy the hibernating larvae
Sow the lab lab or cowpea as an intercrop (Sorghum: Lab lab 4:1)
Set up light trap
Bio-control agents viz.,Trichogramma minutum, Bracon chinensis and Apanteles flavipes
Mix any one of the following insecticides with sand (total quantity of 50kg)
Phorate - 10G@ 8kg
Carbofuran 3G@ 17kg/ha
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