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Spotted bollworm larvae mainly attack bolls, but also feed on squares, shoots and flowers if bolls are not present. If infested during the vegetative state, the caterpillars feed through the terminal buds of the shoots and move downward.

The leaves affected by cotton leafhopper and jassids turn yellowish, then brownish starting from the margins and migrating to the midrib. Leaves gradually show signs of curling before drying completely and shedding.

Black Citrus Aphid affect all citrus trees in all growth stages. The aphids have long piercing mouthparts which they use to suck the sap on shoot tips and young leaves, which leads to distortions of twigs and inflorescences and the curling, rolling or folding of leaves.

Its primary symptoms appear during the spring as small grey or brown flecks on young fruits.

As soon as summer starts, these flecks have developed into small, sunken, brown lesions, sometimes surrounded by a conspicuous red halo.

In the early stage of hairy caterpillars have long white hairs coming from the flanks of their body. Their main feed is leaves of mango trees in groups and several other tree species.

American bollworm has been identified to attack more than 180 host plants. These host plants include beans, maize, tomato, legumes etc. It has caused so much damage to the fields and has developed resistance to so many insectides that it has been popularly given the name of a global pest.