6种除草剂对春玉米田杂草的防除效果
China Plant Protection(2020)
Abstract
杂草严重威胁春玉米生产,为筛选出除草效果好、成本低的苗前封闭除草剂和苗后茎叶除草剂,选择6种除草剂开展田间施药试验,调查各药剂处理对杂草的株防效和鲜质量防效,并测定各处理区玉米产量.结果 表明,播后苗前喷施70%乙·莠·滴丁酯悬浮剂对春玉米田杂草防效较高,药后15d总草株防效和药后45 d总草鲜质量防效分别是98.96%和98.76%;用药成本较低,为86.7元/hm2;增产率为8.27%.在玉米2~5叶期喷施30%烟嘧·莠·氯吡可分散油悬浮剂的控草效果也较高,药后15d总草株防效为98.96%,药后45 d总草鲜质量防效为100%;用药成本也较低,为90.0元/hm2;增产率为7.40%.综合考虑防效、产量与成本,推荐上述两处理应用于春玉米田除草实践.
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