玉米田4种茎叶除草剂防除效果比较

Efficacy Comparison of Four Post-emergence Herbicides in Weed Control in Corn

[目的]比较了4种玉米田茎叶处理除草剂4%烟嘧磺隆SC、10%硝磺草酮SC、10.5%硝磺草酮/烟嘧磺隆混剂OD和33.6%苯吡唑草酮SC的除草效果。[方法]于杂草3～8叶期一次性喷药后分别于不同时期调查杂草盖度变化和鲜质量变化。[结果]4种除草剂均使杂草盖度和鲜质量降低,玉米产量增加。[结论]4种除草剂均有良好的除草效果,即使在推荐施用推荐剂量一半的用量,鲜质量防效也达90%以上,显著增加玉米产量。

The herbicidal efficacy of four post-emergence herbicides,nicosulfuron 4% SC,mesotrione 10% SC,mesotrione/nicosulfuron 10.5% OD and topramezone 33.6% SC,were compared.[Methods]Four herbicides were applied at the 3-to 8-leaf stages of weeds and then weeds coverage and fresh weight were investigated at different stages.[Results]All four herbicides can reduced the coverage and fresh weight of weeds,while increased the yield of corn.[Conclusions]All of the four herbicides had good control against weeds,showing more than 90% control even at the half of recommended dosages,which increased greatly the yield of corn.