Herbicide: If pesticides attack unwanted plants, unwanted grass, then it is called herbicide.Insecticide: Pesticides that are used specifically against insects.Common examples are DDT, chloranil, malathion, parathion. Farmers are mostly dependent on the synthetic pesticides to protect their crop from the pest. DDT is used to kill the mosquito, which spread malaria. But the most famous and commonly used pesticide is DDT that is Dichloro - Diphenyl trichloroethene. Arsenic is the first inorganic pesticide. Because of their low cost and effectiveness, these synthetic pesticides are widely used. They are also called man-made pesticides. Ii) Synthetic pesticides: These pesticides are produced in the lab with the help of chemicals. It is obtained from the shells of marine organisms. Diatomaceous earth powder: It is used in the form of dry powder.Rotenone: It is obtained from the roots of the derris plant.Boric acids: It is used to kill microorganisms and cockroaches.Flowers are dried and powdered, this powder is extracted with an organic solvent to make the pyrethrins, which is used to kill flies. Pyrethrins: It is obtained from the pyrethrum plant.Nicotine: It is obtained from the leaves of the tobacco plant.E.g., nicotine, pyrethrins, neem oil, boric acid, diatomaceous earth powder, rotenone. I) Natural pesticides: It refers to pesticides, which are obtained from a natural source like plant or animal or bacteria or fungi. Some pesticides produce harmful substances when decomposed.Some pesticides are non-biodegradable.Pesticides may get accumulate in organisms which can cause bio-magnification.Side effects of pesticides on the environment: The pesticides which can seriously harm or kill 50% of the total population of a pest has LD50 value. Every pesticide is characterized by its LD 50 value.Most pesticides have a simple structure and simple biological activities.Therefore, they tend to pollute the atmosphere. Pesticides are toxic chemicals, and they act as a pollutant.Properties or characteristics of pesticides: Pest control can be achieved by agro-technical, mechanical, biological, and chemical control. Pest control is the regular process of management of pests and their species. So to eliminate this pest, pest control methods are used. These pests attack the crops in fields and the stored grains. But the agriculture field is facing the problem due to the intervention of pests. As population size is increasing, so for meeting the requirements of this population, continuous efforts are going on in the field of agriculture. For example, birds, rats, rabbits, grasshoppers, ants, silverfish, flies, moths, nematodes, etc.Īccording to 'WHO' one-third population of the world is suffering from malnutrition.

Destructive animals: The animals that damage the farm or are harmful to the crop are considered destructive animals.

Destructive plants: These are harmful plant-like weeds and fungi.

What is a pest?Ī pest is a destructive plant or animal that directly or indirectly affects humans or the things that people are attached to, like crops, livestock, and forestry. Farmers generally use pesticides to control the pests or diseases of plants. Pesticides are toxic or poisonous substances. They are chemical substances, which are used directly or indirectly against pests in order to eliminate or control them. Whereas, insecticides are used to destroy insects. Pesticides are used to kill or destroy pests. For preventing farms and forests from pests, pesticides are used.

So, they are considered unwanted insects, unwanted plants, etc. There are many insects, plants, grass fungus which are harmful to farms and forests. Next → ← prev Difference between Insecticide and Pesticide

Insecticides and pesticides pdf