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herbicide
her·bi·cide H0158400 (hûr′bĭ-sīd′, ûr′-)n. A substance used to destroy or inhibit the growth of plants, especially weeds.
her′bi·cid′al (-sīd′l) adj.herbicide (ˈhɜːbɪˌsaɪd) n (Chemistry) a chemical that destroys plants, esp one used to control weeds ˌherbiˈcidal adj ˌherbiˈcidally advherb•i•cide (ˈhɜr bəˌsaɪd, ˈɜr-)
n. a substance or preparation for killing plants, esp. weeds. [1895–1900] her`bi•cid′al, adj. her·bi·cide (hûr′bĭ-sīd′, ûr′bĭ-sīd′) A chemical used to kill weeds. Compare fungicide, insecticide, pesticide.herbicideA chemical compound that will kill or damage plants.herbicidea substance for destroying plants, especially weeds or other unwanted species; a weed-killer. — herbicidal, adj.See also: Plants
a substance for killing unwanted plant growth.See also: KillingThesaurus| Noun | 1. |  herbicide - a chemical agent that destroys plants or inhibits their growthweed killer, weedkillerAgent Orange - a herbicide used in the Vietnam War to defoliate forest areasAs, atomic number 33, arsenic - a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgaratrazine - a synthetic compound derived from triazine that is widely used as an agricultural herbicide; "atrazine is thought to cause cancer and is banned in some European countries"chemical, chemical substance - material produced by or used in a reaction involving changes in atoms or moleculeslinuron - a herbicide that kills weeds without harming vegetablesparaquat - a poisonous yellow solid used in solution as a herbicidesilvex - a herbicide that is effective in controlling woody plants but is toxic to animalssimazine - a herbicide used to control weeds (especially among crops) |
Translationsherbicide
herbicide (hr`bəsīd'), chemical compound that kills plants or inhibits their normal growth. A herbicide in a particular formulation and application can be described as selective or nonselective. In agriculture, selective herbicides are often used instead of tillage, or in combination with tillage and other agronomic practices, to control weeds without damaging crops. For these no-till or low-till systems, scientists have used biotechnology to develop crop varieties with increased tolerance for herbicides. Nonselective herbicides (e.g., paraquat) toxic to all plants, are used where complete control of plant growth is required. Contact herbicides kill only the parts of the plant they touch; systemic herbicides are absorbed by foliage or roots and translocated to other parts of the plant. Preemergence herbicides, mixed into the soil, will kill germinating seeds and small seedlings. Postemergence herbicides either hinder photosynthesis or inhibit growth. Early chemical herbicides were inorganic compounds. Herbicides such as ashes, common salts, and bittern have been used in agriculture since ancient times. Observation in 1896 that Bordeaux mixtureBordeaux mixture
, fungicide consisting of cupric sulfate and lime in water. Its fungicidal activity is associated with the slow formation of copper compounds, the ultimate toxicant being the cupric ion.
..... Click the link for more information. , a fungicide, also provided control of certain weeds, led to the use of copper sulfate as a selective weed killer to control charlock (wild mustard) in cereals. By 1900, solutions of sulfuric acid, iron sulfate, copper nitrate, and ammonium and potassium salts were known to act as selective herbicides; soon thereafter sodium arsenite solutions became the standard herbicides, and they were used in large quantities until about 1960. Other inorganic herbicides include ammonium sulfamate, carbon bisulfide, sodium chlorate, sulfuric acid solutions, and formulations containing borate. Organic herbicides began to be produced in earnest with dinitrophenol compounds in 1932. A breakthrough occurred in the 1940s with 2,4-D (2,4-dichlorophenoxyacetic acid), a compound similar to plant hormones, which is a highly selective systemic herbicide when used in very small quantities. 2,4-D was quickly adopted to control broad-leaved weeds in corn, sorghum, small grains, and grass pastures, as well as in lawns and other ornamental turf. The phenoxyaliphatic acids and their derivatives, another major group of organic herbicides, succeeded because of their selectivity and ease of translocation. Other groups of organic herbicides include organic arsenicals, substituted amides and ureas, nitrogen heterocyclic acids, phenol derivatives, triazines, and sulfonylureas. In the 1960s and 1970s, a combination of 2,4-D and 2,4,5-T was widely used in Vietnam as a defoliant under the name Agent OrangeAgent Orange,
herbicide used by U.S. forces during the Vietnam War to expose enemy guerrilla forces in forested areas. Agent Orange contains varying amounts of dioxin. Exposure to the defoliant has been linked with chemical acne, non-Hodgkin's lymphoma, Hodgkin's disease,
..... Click the link for more information. . As a result of questions concerning the possible health effects of the use of Agent Orange, heightened awareness of possible ecological and health dangers attributable to herbicides has resulted in reevaluation of many compounds and has called indiscriminate use into question. Use of the dioxin-containing 2,4,5-T was prohibited in the United States in 1984. In 1975, Mexico, at the urging of the United States government, began spraying fields of marijuana with paraquat, which both eliminated the crop and raised fears of toxic side effects in marijuana users. Glyphosate, a compound first identified as a herbicide in 1970 and sold beginning in the 1970s (initially only under the tradename Roundup), has been widely used as a broad-spectrum weedkiller because of its apparent relatively low toxicity and tendency to degrade relatively quickly in the environment. Beginning in the 1990s, the use of crop strains that were resistant to its herbicidal effects contributed to the herbicide's much more widespread use and led to the development of so-called superweeds, which have resistance to glyphosate. See also pesticidepesticide,
biological, physical, or chemical agent used to kill plants or animals that are harmful to people; in practice, the term pesticide is often applied only to chemical agents.
..... Click the link for more information. . herbicide[′her·bə‚sīd] (materials) A chemical agent that destroys or inhibits plant growth. herbicide a chemical that destroys plants, esp one used to control weeds herbicide
herbicide [her´bĭ-sīd] an agent that is destructive to weeds or causes an alteration in their normal growth.herb·i·cide (ĕr'bi-sīd) Any chemical compound designed to kill plants. Herbicides have been used in military operations for deforestation, but the U.S. military excludes herbicides from being classified as chemical-warfare agents.herbicide any chemical that kills plants. Herbicides can be highly selective. For example, 2,4-D only kills DICOTYLEDONS (broad-leaved plants), leaving MONOCOTYLEDONS unharmed.herbicide
Synonyms for herbicidenoun a chemical agent that destroys plants or inhibits their growthSynonymsRelated Words- Agent Orange
- As
- atomic number 33
- arsenic
- atrazine
- chemical
- chemical substance
- linuron
- paraquat
- silvex
- simazine
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