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为了明确34%砜嘧·噻吩磺隆WG对玉米田一年生杂草的除草活性及对玉米的安全性,进行了2年田间药效试验。结果表明:34%砜嘧·噻吩磺隆WG对玉米田一年生杂草如马唐、稗草、小藜等均具有较好的防除效果,药后15 d、30 d的总草株防效分别为86.76%~100.00%、83.26%~99.34%,药后30 d的总草鲜重防效为84.82%~99.50%。玉米平均增产15.85%~29.02%。34%砜嘧·噻吩磺隆WG的防效和增产效果明显优于25%砜嘧磺隆WG和75%噻吩磺隆WG。其在玉米田最佳有效成分用量为30.6~51.0 g/hm2,在此用量下对玉米安全。
In order to clarify the herbicidal activity of 34% sulfonyl-thifensulfuron-methyl WG on annual weeds in corn field and its safety to maize, a 2-year field efficacy trial was conducted. The results showed that 34% sulfonyl-thifensulfuron-methyl WG had good control effect on annual weeds such as crabgrass, barnyardgrass and quinoa in maize fields. The control effects of total 34% 86.76% ~ 100.00% and 83.26% ~ 99.34%, respectively. The control effect of total fresh weight was 84.82% ~ 99.50% after 30 days. The average yield of corn increased 15.85% ~ 29.02%. The control effect and yield increase of 34% sulfonyl-thifensulfuron-methyl WG were obviously better than those of 25% rimsulfuron WG and 75% thifensulfuron WG. The optimum amount of active ingredients in corn field is 30.6 ~ 51.0 g / hm2, which is safe for maize.