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

Choose the correct answer:

1. If weeds are not controlled at the right time

there is heavy damage to the crop
all of the above
most of the crops are lost
causes threat to the crop

2. Insect pests can be controlled by

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

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