Plant protection chemicals - Pesticides.
Pesticide is biological, physical, or chemical agent used to kill plants or animals that are harmful to people as well as to protect crops in the fields. Pesticides, the plant protection chemicals you can get from your local dealer Rack Petroleum. Click here to contact a plant protection specialist near you or view "contact us" page for more information about our locations.
Pesticide description and general information: types and subcategories.
Pesticide is biological, physical, or chemical agent used to kill plants or animals that are harmful to people and agricultural crops; in practice, the term pesticide is often applied only to chemical agents. Various crop protecting pesticides are known as insecticides, nematicides, fungicides, herbicides, and rodenticides, i.e., agents primarily effective against insects, nematodes (or roundworms), fungi, weeds, and rodents, respectively.
Among the biological agents, parasites and predators feed on pests; pathogens sicken them. Physical agents crush, wound, smother, or otherwise injure pests. Chemical pesticides are usually contact, stomach, or fumigant poisons. Contact poisons may have immediate or delayed effects after physical contact with a pest. DDT, the use of which is now illegal in many places, is both a contact and a stomach poison. Fumigants, which may initially have the form of a solid, liquid, or gas, kill pests while in a gaseous state.
For example, paradichlorobenzene, used against moths, comes as a solid cake that vaporizes when exposed to air. Some insecticides and fungicides are systemic, i.e., they are translocated by a plant from the area of application to other plant parts, where they affect only pests that feed on the crop.
Pesticides are applied in various forms: wet sprays, dusts, atomizable fluids, low pressure aerosols, smokes, and seed dressings. Because of concern about their harmful effects on humans and on ecological systems, chemical pesticides undergo exhaustive and expensive trials prior to government registration and release. Efforts are being made to reduce chemical-pesticide use in favor of Integrated Pest Management (IPM), biological controls, and plant-breeding for inherent pest resistance.