Explain the methods of controlling insect pests.

Controlling insect pests:

(i) Root cutting type of insects is controlled by mixing insecticides in the soil.

Example - Chlorpyrifos.

(ii) Stem and leaf cutting type of insects can be controlled by dusting or spraying the contact insecticides.

Example - Malathion, lindane and thiodan.

(iii) All sap sucking insects can be controlled by spraying systemic insecticides.

Example - Dimethoate and metasystox.