Improvement In Food Resources — Science STD 9 — Question

Controlling insect pests:

1. Root cutting type of insects is controlled by mixing insecticides in the soil.

Example: Chloropyriphos.

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

Example: Malathion, lindane and thiodan.

3. All sap sucking insects can be controlled by spraying systematic insecticides.

Example: Dimethoate and metasystox.