Question

7. Discuss how chemicals are used for crop protection.​

Answer 1

Some chemicals called pesticides or insecticides are used to keep pests or insects away from the crops

Medicines are used to prevent and cure plant diseases

Weedicides are used to prevent weeds

Answer 2

Answer:

The main classes of crop protection chemicals are herbicides, insecticides and fungicides. Selective herbicides, for example, control the growth of weeds which would otherwise grow among a crop, competing with it for water, nutrients and sunlight. Without crop protection chemicals agriculture would be less efficient.