Insecticides are substances which kill insects. Pesticides are used for the control of pests. Pesticide is a general term which includes insecticides, fungicides, herbicides and insect repellents.
Presence of insects in indicated by the presence of webs, cocoons, dead or living insects and the presence of rodents is indicated by presence of holes in the bags containing food grains…
It is a very ordinary thing to hear of animals eating plants, but have you ever heard of plants setting traps for animals and then sucking them to death? It sound very horrible, yet the plants that set these traps are most interesting, and the creatures they catch are usually flies that we ourselves kill if we have the chance.