Metamifop: a new post-emergence grass killing herbicide for use in rice

摘要

Metamifop [DBH-129, (R)-2-[4-(6-chloro-l,3-benzoxazol-2-yloxy)phenoxy]-2'-fluoro-N-methylpropionanilide] is a new aryloxyphenoxypropionate (AOPP) herbicide being developed by Dongbu Hannong Chemical Co Ltd, Korea. Like other AOPPs, metamifop provides excellent control on a wide range of annual grass weeds. However, unlike other AOPPs, it shows robust safety on rice. Applied post-emergence in paddy and direct-seeded rice cultivation, metamifop at the rates of 90-200 g a.i./ha gives excellent control of the major grass weeds including Echinochloa spp., Leptochloa chinensis, Digitaria spp. and Eleusine indica. Diverse field trials have been conducted globally to register metamifop both as 3.3-10% EC and as 0.67-1.6% GR formulation for rice cultivation in Asia regions, including Korea and Japan. Metamifop has a favorable lexicological, ecotoxicological, and environmental profile.