//Major Insect Pests of Niger and their Management

Major Insect Pests of Niger and their Management

Major Insect Pests of Niger and their Management

P. Duraimurugan

ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad- 500 030, Telangana, India

Niger (Guizotia abyssinica) considered as minor oilseed crop, its seed contains 32 to 40% oil with 18 to 24% protein. The crop is having capability in giving good seed yield even under low soil fertility, moisture stress and poor crop management. Niger has good effect on soil conservation that is why mostly confined it cultivation to hill slopes, even in the marginal lands. This minor oilseed crop is invaded by a number of insect pests resulting into poor yields. Major insect pests of niger, their characteristic damage symptoms and recommended management practices are given below.

Niger caterpillar (Condica conducta)

Symptoms: Feeding of leaves by green with purple marked caterpillar results in crop defoliation.

Management: Spray Bacillus thuringiensis var. kurstaki (1 g/l) or NSKE 5% or neem based formulations (5 ml/l) against early stages of caterpillar.  In case of severe infestation, spray quinalphos (2 ml/l) or chlorpyriphos (2 ml/l) or dust carbaryl (20 kg/ha). Avoid applying insecticide during flowering period to safeguard the honey bees aiding pollination.

Green semilooper (Thysanoplusia orichalcea)

Symptoms: Larva feeds on the leaves and defoliates the plant.

Management: Collect and destroy early instars of semilooper along with damaged leaves. Spray Bacillus thuringiensis var. kurstaki (1 g/l) or NSKE 5% or neem based formulations (5 ml/l) against early stages of caterpillar.  In case of severe infestation, spray quinalphos (2 ml/l) or chlorpyriphos (2 ml/l) or dust carbaryl (20 kg/ha). Avoid applying insecticide during flowering period to safeguard the honey bees aiding pollination.

Bihar hairy caterpillar (Spilarctia obliqua)

Symptoms: Young larvae feed gregariously by scraping on the back surface of the leaves. The grown up larvae migrate to other plants and feed voraciously on leaves and growing tips.

Management: Collect and destroy the egg masses and early instars of hairy caterpillars along with damaged leaves. Spray Bacillus thuringiensis var. kurstaki (1 g/l) or NSKE 5% or neem based formulations (5 ml/l) against early stages of caterpillars. In case of severe infestation, spray quinalphos (2 ml/l) or chlorpyriphos (2 ml/l) or dust carbaryl (20 kg/ha). Avoid applying insecticide during flowering period to safeguard the honey bees aiding pollination.

Aphid (Uroleucon carthami)

Symptoms: Sucking pest infests the crop at later stages of crop growth.

Management: Pluck and destroy the aphid infested plant parts to prevent aphid multiplication. Spray NSKE 5% or neem based formulations (5 ml/l). In case of severe infestation, spray dimethoate (1.5 ml/l) or oxydemeton-methyl (1.5 ml/l). Avoid applying insecticide during flowering period to safeguard the honey bees aiding pollination.

Niger capsule fly (Dioxyna sororcula)

Symptoms: Maggot feeds on seed and pulp inside the capitula.

Management: Install light trap (one/ha) to lure and kill capsule fly. In case of severe infestation, spray dimethoate (1.5 ml/l) or oxydemeton-methyl (1.5 ml/l).

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