CBSE Class 9 Answered
(a) What are pesticides?
(b) Why excessive use of pesticides not advisable?
(c) Name two preventive measures against pests.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) Chemicals which are used to kill pests, fungi, weeds and rodents are called pesticides.
(b) Excessive use of pesticides creates problems, since they can be poisonous to many plant and animal species and cause environmental pollution.
(c) Use of resistant varieties and summer ploughing.
Answered by | 04 Jun, 2014, 03:23: PM
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