7%双氟·炔草酯可分散油悬浮剂对冬麦田杂草的防除效果

Efficacy of Florasulam·Clodinafop-Propargyl OD on Weeds in Winter Wheat

为明确7%双氟·炔草酯可分散油悬浮剂对南疆冬麦田混合发生杂草的防除效果及合适施用剂量,以7%双氟·炔草酯可分散油悬浮剂不同剂量喷雾,以10%苯磺隆可湿性粉剂+5%(唑啉草酯+炔草酯)为对照药剂,调查药后30、45 d的杂草株数及鲜质量,计算防效。结果表明,药后45 d,7%双氟·炔草酯可分散油悬浮剂52.5~84 m L a.i./hm^2对播娘蒿和硬草的株防效及鲜质量防效均在98%以上,对萹蓄的鲜质量防效均在85%以上,且对小麦安全。因此,在播娘蒿、硬草和萹蓄等杂草混合发生的冬麦田可选用7%双氟·炔草酯可分散油悬浮剂,用量推荐用量为52.5~84.0 m L a.i./hm^2。

The efficacy and recommended dose of 7%florasulam· clodinafop-propargyl OD for controlling weeds in winter wheat were investigated in the field by spraying at 30 and 45 days.The formulated mixture 7%florasulam· clodinafop-propargyl OD at different doses was compared to 10%tribenuron-methyl WP+5% traxos EC ( pinoxaden plus clodin-afop-propargy),which was used as a control.Application of 7% florasulam· clodinafop -propargyl OD at 52.5 ~84 mL a.i./hm2 effective controlled weeds at levels avove 98% for Descurainia sophia ( L.) Schur.and Sclerochloa kengiana Tzvel.Control of Polygonum aviculare L based on fresh weight was higher than 85%.All treatments were selec-tive to winter wheat.Therefore,D.sophia,S.kengiana and P.aviculare could be controlled by 7%florasulam· clodin-afop-propargyl OD at the recommended doses are 52.5~84 mL a.i./hm2 .