30%烟嘧磺隆·莠去津·硝磺草酮可分散油悬浮剂对甜玉米田杂草的防效及安全性

研究30%烟嘧磺隆·莠去津·硝磺草酮可分散油悬浮剂在甜玉米田的应用效果,在甜玉米不同叶龄期开展田间试验,评价其对杂草的防除效果及对甜玉米的安全性。结果表明,30%烟嘧磺隆·莠去津·硝磺草酮可分散油悬浮剂在甜玉米3～4叶期或6～7叶期施药,900～1 575 g a.i./hm2剂量范围内对甜玉米品种粤甜28安全,对玉米田常见杂草凹头苋、光头稗、马唐和香附子的防效及增产效果均显著高于对照药剂38%莠去津悬浮剂2 160 g a.i./hm2播后苗前处理。推荐30%烟嘧磺隆·莠去津·硝磺草酮可分散油悬浮剂在900～1 350 g a.i./hm2范围内,甜玉米3～5叶期茎叶喷雾使用。

Weed Control Effect of 30% Nicosulfuron·Atrazine·Mesotrione Oil Dispersion and the Safety to Sweet Corn in Field

In order to explicate the application prospect in sweet corn fields, 30% nicosulfuron·atrazine·mesotrione oil dispersion (OD) was applied at different leaf stages of sweet corn under field conditions, through which the weed control effect and the safety to sweet corn were evaluated. When applied at 3-4 leaf stage or 6-7 leaf stage, 30% nicosulfuron·atrazine·mesotrione OD showed high safety to the sweet corn breed Yuetian 28 in the doses of 900-1 575 g a.i./ha. Compared with the conventional herbicide 38% atrazine suspension concentrate(SC), which applied pre-emergence at 2 160 g a.i./ha, 30% nicosulfuron·atrazine·mesotrione OD had higher weed control efficacy and significant effect on increasing yield. Based on the results, 30% nicosulfuron·atrazine·mesotrione OD was recommended to spray at 3-5 leaf stage of sweet corn, with the dose 900~1 350 g a.i./ha.