Pesticide
Substance used to destroy pests / From Wikipedia, the free encyclopedia
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Pesticides are substances that are used to control pests.[1] They include herbicides, insecticides, nematicides, fungicides, and many others (see table).[2] The most common of these are herbicides, which account for approximately 50% of all pesticide use globally.[3] Most pesticides are used as plant protection products (also known as crop protection products), which in general protect plants from weeds, fungi, or insects. In general, a pesticide is a chemical or biological agent (such as a virus, bacterium, or fungus) that deters, incapacitates, kills, or otherwise discourages pests. Target pests can include insects, plant pathogens, weeds, molluscs, birds, mammals, fish, nematodes (roundworms), and microbes that destroy property, cause nuisance, or spread disease, or are disease vectors. Along with these benefits, pesticides also have drawbacks, such as potential toxicity to humans and other species.