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Improvement in Food Resources — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceImprovement in Food Resources5 Marks
Question
Explain the various preventive measures against insect pests.
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Answer

Preventive measures against insect pests:

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

Example: chloropyriphos.

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

Example: malathion, lindane and thiodan.

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

Example: dimethoate and metasystox.

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