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

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

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,900~1575 g a.i./hm^2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2160 g a.i./hm^2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900~1350 g a.i./hm^2范围内,甜玉米3~5叶期茎叶喷雾使用。

In order to explicate the application prospect in sweet corn fields,30%nicosulfuron·atrazine·mesot-rione oil dispersion(OD)was applied at different leaf stages of sweet corn under field conditions,through which theweed 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 of900-1575 g a.i./ha.Compared with the conventional herbicide 38%atrazine suspension concentrate(SC),which ap-plied pre-emergence at 2160 g a.i./ha,30%nicosulfuron·atrazine·mesotrione OD had higher weed control efficacyand significant effect on increasing yield.Based on the results,30%nicosulfuron·atrazine·mesotrione OD was rec-ommended to spray at 3-5 leaf stage of sweet corn,with the dose 900~1350 g a.i./ha.