Weeds, crop diseases, and insect pests — task. Science CBSE Homework Assignments, Class 9.

Choose the correct answer:

1. Chenopodium is an example of a

none of the above
weed
insect pests
crop that is used in green manure

2. Insect pests can be controlled by

spraying pesticides and insecticides
all of the above
summer ploughing
use of pest resistant varieties

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