不同除草剂对棉田恶性杂草香附子的防除效果及安全性分析

Analysis on the control effects and safety of different herbicides to the malignant weed Cyperus rotundus in cotton field

为筛选出棉田防除香附子(Cyperus rotundus L.)的除草剂,选用5种除草剂,采用大田试验,对比分析了其对棉田香附子的防治效果及对棉花生长的安全性。结果表明,药后14 d,75%氯吡嘧磺隆水分散粒剂(WG)和10%吡嘧磺隆可湿性粉剂(WP)对香附子的株防效分别为88.68%和87.71%,极显著高于其他药剂处理;药后21 d,75%氯吡嘧磺隆WG和10%吡嘧磺隆WP对香附子的株防效分别为78.70%和76.04%,极显著高于其他药剂处理;药后28 d,75%氯吡嘧磺隆WG对香附子的株防效和鲜重防效分别为82.37%和91.82%,极显著高于其他药剂处理;安全性分析显示,5种除草剂均对棉花生长安全。

In order to screen out the herbicides of Cyperus rotundus in cotton field,five herbicides were selected and their control effects on Cyperus rotundus and their safety on cotton growth were compared and analyzed by field tests.The results showed that,after 14 days of treatment,the plant control effects of 75%halosulfuron-methyl WG and 10%pyrazosulfuron-ethyl WP were 88.68%and 87.71%,respectively,which were significantly higher than other treatments;after 21 days of treatment,the plant control effects of 75%halosulfuron-methyl WG and 10%pyrazosulfuron-ethyl WP were 78.70%and 76.04%,respectively,which were significantly higher than the other herbicides;after 28 days of treatment,the plant control effects and fresh weight control effects of 75%halosulfuron-methyl WG on Cyperus rotundus were 82.37%and 91.82%,respectively,which were significantly higher than other treatments.Safety analysis showed that the five herbicides were all safe for cotton growth.