Mention three different ways in which crop plants can be attacked by insect pests. Also suggest one control measure and two preventive measures against pests.
CBSE Class IX Science SA 2 (3 Marks)
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Three ways in which crop
plants can be attacked by insect pests :
(i) They cut the plant parts.
(ii) They suck the cell sap from various parts.
(iii) They bore into stem and fruits.
Control measure : Spraying pesticides
Preventive measure : (i) Use of resistant varieties, (ii) Ploughing
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Explanation:
Pest control is the regulation or management of a species defined as a pest, a member of the animal kingdom that impacts adversely on human activities. The human response depends on the importance of the damage done, and will range from tolerance, through deterrence and management, to attempts to completely eradicate the pest. Pest control measures may be performed as part of an integrated pest management strategy.
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