EVERYDAY SCIENCE

Detailed explanation-1: -Generally, 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, and (iii) they bore into stem and fruits. They thus affect the health of the crop and reduce yields.

Detailed explanation-2: -Spread of Disease Diseases from insects can cause serious illness and death in humans and other animals. The most deadly animal on Earth is the mosquito, due to its role in the spread of malaria and other diseases. It is estimated that 700, 000 people die annually due to mosquito-borne diseases.

Detailed explanation-3: -Aphids. How it Kills: Also known as plant lice, they are diminutive, soft bodied, pear shaped insects which suck sap, typically during the spring and summer seasons. Severe infestation results in curling of leaves, stunted growth and gradual drying and death of young plants.

Detailed explanation-4: -Insects and mites can cause plant diseases or transport and inoculate viruses and microorganisms such as bacteria and fungi that cause plant disease. Insects are the most important vectors of plant viruses and the main or sole means of spread of many plant pathogens.