Question

why should preventive measures and biological control methods be preferred for protecting crops

Answer 1

Preventive measures and biological control methods should be preferred for protection of crops because they are ecological safe target specific and harmless to other life forms. Biological control of weeds involves the excessive use of insects or some other organisms which consume and destroy the weed plants.

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Answer 2

Explanation:

Preventive and control mesures are used before graind are stored for future use. They include strict cleaning of the produce before storage, proper drying of the produce first in sunlight and then in shade, and fumigation using chemicals that can kill pests.