Insect Life CycleAgroStar Agronomy Centre of Excellence
Life Cycle of Gram Pod Borer
Gram commonly known as Chickpea or Bengal Gram is the most important pulse crop in India. It is used for human consumption as well as for animal feed, grains, fresh green leaves are used as vegetables, while chickpea straw is an ideal feed for cattle. Gram pod borer is a polyphageal insect, infesting gram, lablab, safflower, chilies, groundnut, tobacco and cotton.
Symptoms of Damage: Pod borer causes damage to the gram crop from November to March. In the beginning, it feeds on tender leaves and twigs and later, it begins causing damage to buds blooming and pod formation stage, the larvae usually feed on seeds with their head inside the pod and the rest of the body outside. Borers cause a huge amount of crop damage. The loss of yield due to pod borer is about 50% to 60%.
Egg: Spherical yellowish eggs are laid only on the tender parts and buds of the plants. The incubation period lasts 2-3 days. Around 500-1000 eggs are laid by single moth on different parts of the plants.
Larva: Caterpillars are of varying colours, initially brown and later greenish with white lines on the side of the body. Body covered with radiating hair. The larval period is 20-25 days. The full-grown caterpillar pupates in the soil.
Pupa: Pupation occurs inside the soil in an earthen cell. Pupa measures 16 mm in length, the pupal stage lasts 7-15 days.
Adult: Moth is stout, medium sized with brownish/greyish forewings with a dark cross band near outer margin and dark spots near costal margins, with a wing expanse of 3.7 cm.
• To control pod borer, use different types of natural enemies and bio-control agents such as, Chelonus blackburni etc.
• Spray with Profenofos 50 EC @ 2 ml per litre, Indoxacarb 14.5% SC @ 0.5 ml or Spinosad 45% SC @ 0.1 ml or 2.5 ml Chloropyriphos 20 EC @ per liter.
Source: Agrostar Agronomy Centre Excellence
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