王宏栋，韩冰，韩双，郭建军，武明飞，李冬刚

摘要：为明确5种除草剂对玉米田杂草的防除效果及其对玉米的安全性，采用茎叶喷雾施药，通过田间药效试验研究30%苯唑草酮悬浮剂+50%莠去津悬浮剂、35%硝磺草酮·烟嘧磺隆·莠去津可分散油悬浮剂、550 g/L硝磺草酮·莠去津悬浮剂、27%烟嘧磺隆·莠去津可分散油悬浮剂、25%苯唑氟草酮·莠去津可分散油悬浮剂在推荐剂量下对玉米田杂草的防效。结果表明，5种药剂都能够有效防除玉米田杂草，药效作用持续时间长;27%烟嘧磺隆·莠去津处理组对所选玉米品种郑单958表现轻微药害症状，后期恢复正常，其他药剂对玉米有很好的安全性;与清水对照相比，5种除草剂处理后的玉米田均有较好的增产效果。

关键词：除草剂;玉米田杂草;田间防效;安全性;增产

中图分类号：S451文献标志码：A文章编号：1003-935X（2021）02-0041-06

Efficacy and Crop Selectivity of Five Herbicides on Weeds in MaizeWANG Hongdong，HAN Bing，HAN Shuang，GUO Jianjun，WU Mingfei，LI Donggang

（Dezhou Academy of Agricultural Sciences，Dezhou 253015，China）Abstract：A field efficacy test was established to determine the efficacy of five commercial herbicides on weeds in maize an their crop selectivity. Formulations of topramezone 30% SC+atrazine 50% SC，mesotrione·nicosulfuron·atrazine 35% EC，mesotrione·atrazine 550 g/L SC，nicosulfuron·atrazine 27% EC，and topramezone·atrazine 25% EC were sprayed at their respective recommended doses to the foliage of weeds in a maize field. All herbicides provided long lsting control of weeds. Maize cultivar Zhengdan 958 was slightly injured by nicsulfuron·atrazine 27% EC，but the crop plants recovered and returned to normal later in the season. Other treatments were selective to maize. Compared with the untreated control，maize yield increased when any of the five herbicides were applied to control weeds.

Key words：herbicide;weeds in maize field;field efficacy;security

玉米是我国播种面积最大的粮食作物，近年来，随着玉米种植面积的增加和田间复种指数的提高，玉米田间杂草的发生日趋严重[1-2]。在玉米生长早期，宽阔的行间距、适宜的温湿度、充足的养分供给都给杂草创造了适宜的生长条件，杂草根系发达、生根快，争夺肥、光、水分、空间的能力要强于玉米幼苗，因此，玉米苗期阶段，也被认为是许多杂草发芽、生长的旺盛时期[2-3]。而随着玉米进入生长中后时期，玉米形成高大密闭群体，杂草的发生与生长均受到抑制，对玉米的产量损失不大。因此，如何在播后苗前或是苗后控制住杂草的发生与生长则显得尤为重要[4-6]。……