【中文名称】绿草定；盖灌能；盖灌林；3，5，6-三氯-2-吡啶氧乙酸 【英文名称】triclopyr;Garlon;3,5,6-trichloro-2-pyridyloxy-acetic acid;((3,5,6-trichloro-2-pyridinyl)oxy)acetic acid 【CAS登录号】 55335-06-3 【相对分子量或原子量】256.6 【熔点（℃）】149～150 【蒸气压（Pa）】0.168mPa(25℃) 【毒性LD50(mg/kg)】 急性经口LD50：大鼠713、兔550、豚鼠310、野鸭1698，兔急性经皮LD50大于2000，对皮肤无刺激，对眼睛稍有刺激。鱼毒LC50(96h.mg/L)：虹鳟117、太阳鱼148。蜜蜂在0.60mg/只剂量下无毒。 【性状】 纯品为蓬松的固体 【溶解情况】 25℃溶解度：水440mg/L，丙酮989g/kg、氯仿27.3g/kg、己烷410mg/kg、辛醇307g/kg。 【用途】 本品可被植物的叶和根吸收，并转移到植株．90g(a.i.)/ha与2，4-滴或敌稗混用，可防除稻田和小麦田（不能用于大麦田）杂草；也可用于种植园（如油棕和橡胶），用125～250g(a.i.)/ha可防除覆盖植物，用0.72～10kg(a.i.)/ha，可防除泽兰属及其它主要杂草；在牧场中，用l～2kg(a.i.)/ha可防除一年生和多年生草本杂草；以2～4kg/ha可防除悬钩子属和其它木本杂草；在森林中，用4～8kg/ha，用于生育处理；1.5～2.0kg/ha用于针叶树处理；2～8kg/ha，用于工业区除草，放牧地除草用量为0.24～10kg/ha． Triclopyr (3,5,6-Trichloro-2-pyridinyloxyacetic acid) is a systemic, foliar herbicide in the pyridine group. It is used to control broadleaf weeds while leaving grasses and conifers unaffected.
Triclopyr is unusually effective on woody plants and is used for brush control in rights of way and defoliation of wooded areas. It is sold under the trade names Garlon and Release for these purposes.
Also used for broadleaf weeds, particularly Creeping Charlie (Glechoma hederacea), upon which it is uncommonly effective. 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 It is a major ingredient in Confront, which was withdrawn from most uses due to concerns about compost contamination from the other major ingredient, clopyralid.
Triclopyr is formulated both as an ester and as an amine salt. The usual tradeoffs regarding effectiveness, drift, and toxicity to humans apply to these two formulations. It is chemically very similar to the herbicide which it generally replaces, 2,4,5-T, which was phased out in the U.S. in the 1970s amid toxicity concerns.
