40%砜吡草唑悬浮剂防除冬小麦田一年生杂草效果与安全性

Efficacy of Pyroxasulfone 40%SC against Annual Weeds and Selectivity to Wheat

为明确40%砜吡草唑悬浮剂对小麦田一年生杂草的防效及对小麦的安全性,于2016年采用随机区组试验设计方法进行田间药效试验。40%砜吡草唑悬浮剂于小麦3~4叶期进行茎叶喷雾处理,在有效成分用量为150、180、210 g a.i./hm^2的条件下,对小麦田一年生杂草雀麦、播娘蒿的防效较好,鲜重防效分别为86.41%、91.07%、93.06%,中高剂量防效优于对照药剂异丙隆和甲基二磺隆。对小麦安全,无药害发生,与空白对照相比增产7.60%~11.34%。

The study was conducted to confirm the efficacy of pyroxasulfone 40%SC against annual weeds and its selectivity to wheat.Field pharmacodynamics experiments were carried out by random group test design in 2016.Pyroxasulfone 40%SC effectively controlled Bromus japonicus and Descurainia sophia at 150,180,and 210 g a.i./hm^2.Fresh weight was reduced by 86%、91%、and 93%,respectively.The middle and high doses were superior to isoproturon and mesosulfuron-methyl.Pyroxasulfone 40%SC is selective to wheat increasing its yield by 7.6 to 11.3%.