Question

For protection of crops some preventive measures and control are necessary?Why?​

Answer 1

Answer:

Explanation:

Preventive measures and Biological methods should be used as preferred methods for protecting crops since artificial and chemical methods can cause a high amount of harm to the crop, soil, as well as the consumers.

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Answer 2

Sometimes crops are very much affected or destroyed by the weeds, insects pests and diseases. For example

(i) Weeds compete for food, space and light. They use the nutrients from the soil and reduce the growth of the crop.

(ii) Insect pests affect the health of the crop and reduce its yield.

(iii) The pathogens like bacteria, viruses and fungi cause the disease in the plants. Therefore they must be controlled by using suitable preventive masures.