3种除草剂对大麦田杂草防除效果及产量效应

通过田间药效试验,比较6.9%大膘马、5.8%双氟磺草胺和5%唑啉草酯3种除草剂及其混剂对大麦田杂草的防效以及对大麦的安全性和增产效果。结果表明:6.9%大膘马单剂(禾本科杂草)、5%唑啉草酯1 800 m L/hm~2(禾本科杂草)和5.8%双氟磺草胺150 m L/hm~2(阔叶类杂草)对相应大麦田杂草都有较好的防控作用,鲜重防效率达到91.3%以上,而5%唑啉草酯1 200 m L/hm~2和5.8%双氟磺草胺120 m L/hm~2防效一般,鲜重防效率分别为86.90%和87.1%;6.9%大膘马与5.8%双氟磺草胺混配两类杂草防除效果显著,但对大麦产生3级药害,5%唑啉草酯和5.8%双氟磺草胺混配药效持久,对大麦安全,杂草的鲜重防效率达到92.97%以上,且增产率分别达到9.91%和11.9%。

Control Effects,Barley Yield Response of Three Herbicides and Their Mixtures on Weeds in Barley Field

The control efficacy of formulated 6.9% puma super EW, 5.8% florasulam SC, 5% pinoxaden SC and their immixtures on weeds and selectivity to barley were studied under field conditions, to provide a basis for controlling weeds in barley field. The results indicated that 6.9% puma super EW(600, 1200 mL/hm2), 5% pino xaden SC(1800 mL/hm2), 5.8% florasulam SC(150 mL/hm2) showed good inhibition on corresponding weeds, which controlled over 90% weeds respectively, based on fresh weight determination. But 5% pino xaden SC(1200 mL/hm2) and 5.8% florasulam SC(120 mL/hm2) had lower control efficacy, which controlled 86.90%, 87.1% on weeds respectively, based on fresh weight determination. 6.9% puma super SC(600 mL/hm2) plus 5.8% florasulam SC(120, 150 mL/hm2) had significant inhibitory on corresponding weeds, but had obvious inhibitory effect on barley. 5% pino xaden SC(1800 mL/hm2)plus 5.8%florasulam SC(120, 150 mL/hm2) had more lasting control efficacy to weeds and good selectivity on barley, which controlled over 92.97%weeds, based on fresh weight determination, and provided the increasing rate of 9.9%, 11.9% respectively on barley yield.