Triclopyr (3,5,6-trichloro-2-pyridinyloxyacetic acid) is an

organic compound In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. Th ...

in the

pyridine Pyridine is a basic heterocyclic organic compound with the chemical formula . It is structurally related to benzene, with one methine group replaced by a nitrogen atom. It is a highly flammable, weakly alkaline, water-miscible liquid w ...

group that is used as a systemic foliar

herbicide Herbicides (, ), also commonly known as weedkillers, are substances used to control undesired plants, also known as weeds.EPA. February 201Pesticides Industry. Sales and Usage 2006 and 2007: Market Estimates. Summary in press releasMain page f ...

and

fungicide Fungicides are biocidal chemical compounds or biological organisms used to kill parasitic fungi or their spores. A fungistatic inhibits their growth. Fungi can cause serious damage in agriculture, resulting in critical losses of yield, quality ...

Uses

Triclopyr is used to control broadleaf weeds while leaving grasses and conifers unaffected or to control

rust Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron(III) oxides (Fe2O3·nH2O) and iron(III) oxide-hydroxide (FeO( ...

diseases on crops. Triclopyr is effective on woody plants and is used for brush control in the right of way and defoliation of wooded areas. In the USA it is sold under the trade names Garlon, Remedy, and many others, and in the UK as SBK Brushwood Killer. It is also used for broadleaf weeds, particularly creeping charlie ('' Glechoma hederacea''). It is sold under the trade names Turflon, Weed-B-Gon (purple label), and Brush-B-Gon ("Poison Ivy Killer") for these purposes. It is a major ingredient in Confront, which was withdrawn from most uses due to concerns about compost contamination from the other major ingredient, clopyralid.

Environmental effects

Triclopyr breaks down in soil with a half-life of between 30 and 90 days. It degrades rapidly in water, and remains active in decaying vegetation for about 3 months.''Environmental Fate Of Triclopyr''
Carissa Ganapathy, Environmental Monitoring & Pest Management Branch Department of Pesticide Regulation Sacramento, CA The compound is slightly toxic to ducks ( LD₅₀ = 1698 mg/kg) and quail (LD₅₀ = 3000 mg/kg). It has been found nontoxic to bees and very slightly toxic to fish (rainbow trout LC₅₀ (96 hr) = 117 ppm). Garlon's fact sheet for their triclopyr ester product indicates that triclopyr is highly toxic to fish, aquatic plants, and aquatic invertebrates, and should never be used in waterways, wetlands, or other sensitive habitats. This is only for the triclopyr ester product, not for the triclopyr amine product.

References

External links

archived Triclopyr Technical Fact Sheet – National Pesticide Information Center

Triclopyr General Fact Sheet – National Pesticide Information Center

* {{Herbicides Auxinic herbicides Chloropyridines Carboxylic acids Ethers Fungicides Pyridines