"Weedkiller" redirects here. For the album by Ashnikko, see Weedkiller (album).
A field after application of a herbicideWeeds controlled with herbicide
Herbicides (US: /ˈɜːrbɪsaɪdz/, UK: /ˈhɜːr-/), also commonly known as weed killers, are substances used to control undesired plants, also known as weeds.[1] Selective herbicides control specific weed species while leaving the desired crop relatively unharmed, while non-selective herbicides (sometimes called "total weed killers") kill plants indiscriminately.[2] The combined effects of herbicides, nitrogen fertilizer, and improved cultivars has increased yields (per acre) of major crops by 3x to 6x from 1900 to 2000.[3]
In the United States in 2012, about 91% of all herbicide usage, determined by weight applied, was in agriculture.[4]: 12 In 2012, world pesticide expenditures totaled nearly $24.7 billion; herbicides were about 44% of those sales and constituted the biggest portion, followed by insecticides, fungicides, and fumigants.[4]: 5 Herbicide is also used in forestry,[5] where certain formulations have been found to suppress hardwood varieties in favor of conifers after clearcutting,[6] as well as pasture systems.
^EPA. February 2011 Pesticides Industry. Sales and Usage 2006 and 2007: Market Estimates Archived 2015-03-18 at the Wayback Machine. Summary in press release here Main page for EPA reports on pesticide use is here.
^Appleby, Arnold P.; Müller, Franz; Carpy, Serge (2001). "Weed Control". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a28_165. ISBN 3-527-30673-0.
^Smil, Vaclav. "Nitrogen Cycle and World Food Production" (PDF).
^ abAtwood, Donald; Paisley-Jones, Claire (2017). "Pesticides Industry Sales and Usage: 2008 – 2012 Market Estimates" (PDF). U.S. Environmental Protection Agency.
^"Governments say glyphosate is safe, but some say 'poison' is being sprayed on northern forests". CBC News. 2 July 2019.
^"GLYPHOSATE AND THE POLITICS OF SAFETY". Halifax Examiner. 7 October 2016.
Herbicides (US: /ˈɜːrbɪsaɪdz/, UK: /ˈhɜːr-/), also commonly known as weed killers, are substances used to control undesired plants, also known as weeds...
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heterocycles of similar structure. This salt is one of the most widely used herbicides. It is quick-acting and non-selective, killing green plant tissue on contact...
the genomes of animals. It presents an attractive biological target for herbicides, such as glyphosate. A glyphosate-resistant version of this gene has been...
are abundant broadleaf weeds, a chemical herbicide (weed killer) can be useful. There are chemical herbicides meant for controlling broadleaf weeds. Perennial...
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becomes heme. Inhibition of this enzyme is a strategy used in certain herbicides. The PPOX gene is located on the long (q) arm of chromosome 1 at position...
as 2,4-D and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), are sold as herbicides. Broad-leaf plants (dicots), such as dandelions, are much more susceptible...
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of herbicides. The reliance on herbicides has resulted in the rapid evolution of herbicide resistance in weeds, making previously effective herbicide treatments...
states. Weeds resistant to multiple herbicide modes of action are also on the rise. Before glyphosate, most herbicides would kill a limited number of weed...
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