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[目的]为有效的控制玉米田各种杂草,减少大量施药而产生的药害,找出高效安全的除草浓度,[方法]对玉米田杂草(马唐、马齿苋、反枝苋)进行田间药效试验。通过对不同浓度15%硝磺草酮可分散油悬浮剂对不同杂草施药后,防治效果进行差异显著性分析。[结果]除人工除草外,15%硝磺草酮可分散油悬浮剂用量为11 320 g/hm2,于施药后的3个时期对玉米田马唐、马齿苋、反枝苋的防效均达到最大,且对上述3种杂草的鲜重质量变化的影响也是最大。[结论]15%硝磺草酮对玉米田杂草(马唐、马齿苋、反枝苋)防效较好,可以广泛的推广和应用。
[Objective] The study aimed to control various weeds in corn field and reduce the phytotoxicity caused by large amount of pesticide application, and to find a safe and effective herbicide concentration. [Method] The weeds (crabgrass, purslane, Amaranth) field efficacy test. The control effect of 15% mesotrione dispersible oil suspension concentrates on different weeds were analyzed statistically. [Result] In addition to artificial weeding, the amount of 15% mesotrione dispersible oil suspending agent was 11 320 g / hm2, and the antifungal activities of Cotinumulon, purslane and Amaranthus retroflexus The effect reached the maximum, and the three kinds of weeds fresh weight and quality changes are also the greatest impact. [Conclusion] The control effect of 15% mesotrione on weeds (Crabgrass, Purslane and Amaranthus retroflexus) in corn field was good and could be widely applied and popularized.