Herbicides, also commonly known as weedkillers, are pesticides used to kill unwanted plants. Selective herbicides kill specific targets, while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often synthetic "imitations" of plant hormones. Herbicides used to clear waste ground, industrial sites, railways and railway embankments are not selective and kill all plant material with which they come into contact. Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.

Some plants produce natural herbicides, such as the genus Juglans (walnuts), or the tree of heaven; such action of natural herbicides, and other related chemical interactions, is called allelopathy.

Herbicides are widely used in agriculture and landscape turf management. In the US, they account for about 70% of all agricultural pesticide use.

Read more about Herbicide:  History, Health and Environmental Effects, Resistance, Classification, Organic Herbicides, Application, Terminology, In Current Use, Historical Interest: 2,4,5-T

Other articles related to "herbicide, herbicides":

Herbicide - Historical Interest: 2,4,5-T
... 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) was a widely used broadleaf herbicide until being phased out starting in the late 1970s ... about dioxins was high, and production and use of other (non-herbicide) chemicals potentially containing TCDD contamination was also withdrawn ... Agent Orange was an herbicide blend used by the U.S ...
Pesticide Drift - Herbicide Volatilisation
... Herbicide volatilisation refers to evaporation or sublimation of a volatile herbicide ... Herbicides vary in their susceptibility to volatilisation ... Prompt incorporation of the herbicide into the soil may reduce or prevent volatilisation ...
Paraquat - Weed Resistance Management
... Problems with herbicide resistant weeds may be addressed by applying herbicides with different modes of action, along with cultural methods such as crop ... weeds that have become resistant to the very widely used non-selective herbicide glyphosate ... first, then followed seven to ten days later by a paraquat herbicide ...