12. State three ways by which pests attack the plants. Name the
chemical used to control pests.
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Insect pests attack the plants in three ways: (i) They cut the root, stem and leaf. (ii) They suck the cell sap from various parts of the plant.(iii)they bore into stem and fruit
chemicals use to control pests
pesticides are often classified according to the pest they are intended to control. For example, insecticides are used to control insects; herbicides to control plants; fungicides, fungi; rodenticides, rodents; avicides, birds; and bactericides to control bacteria.
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