Development of a rice herbicide, ipfencarbazone.

Hokko Chemical Industry Co., Ltd. found a novel triazolinone class herbicide regarded as 1-aryl-4-carbamoyl-1,2,4-triazolinone derivatives that shows high level of safety to paddy rice, and high activity and long residual activity against Echinochloa spp. and other weeds. We selected a new paddy rice herbicide ipfencarbazone as the optimum compound. Ipfencarbazone is a pre-emergence and early post-emergence rice herbicide that controls annual grass weeds, annual sedge weeds and some annual broadleaf weeds at a rate of 250 g a.i./ha. It inhibits the biosynthesis of fatty acids in plants (VLCFA). Two formulations containing ipfencarbazone, Winner® and Fighter®, have been registered in Japan since 2013 and various combinations have been launched.