Question

Write the modes by which insects affect the crop yield.

Answer 1

Following are the different modes by which insect pest affects the crop yield.
(i) Cutting: Some insect pests cut different plant parts like leaves, fruits and flowers thus damaging the plant. Damaged leaves would result in lower rate of photosynthesis. Damaged flowers will result in less production of seed/grains.
(ii) Borers: Some pests burrow in a specific plant part and live inside. There can be stem borers or fruit borers. These pests utilize resources from plants.
(iii) Suckers: Some pests use their proboscis to suck cell sap from plant parts.