糜子田土壤处理除草剂安全性与药效筛选试验

通过在糜子田播后苗前,选择常用的75%噻吩磺隆水分散粒剂、72%2,4-D丁酯乳油、50%扑草净可湿性粉剂、45%扑津.西草净可湿性粉剂、330g.L-1二甲戊灵乳油、960g.L-1异丙甲草胺乳油和38%莠去津悬浮剂7种土壤处理除草剂,分别设低、中、高量进行安全性及防效筛选试验。结果表明:45%扑津.西草净可湿性粉剂安全性最高,并且株防效和鲜重防效均达90%以上,建议用量为2 250～2 475kg.hm-2;其次是50%扑草净可湿性粉剂和38%莠去津悬浮剂,建议用量分别为50%扑草净可湿性粉剂750～900g.hm-2,38%莠去津悬浮剂3 750～4 500mL.hm-2;330g.L-1二甲戊灵乳油和960g.L-1异丙甲草胺乳油药害严重,不可应用于糜子田化学除草;75%噻吩磺隆水分散粒剂及72%2,4-D丁酯乳油对禾本科杂草无效,不推荐单独应用。

Safety and Efficacy Screening Tests of Herbicide in Millet Field Soil Treatment

After sowing and before emergence in the millet field,Selecting seven common soil treatments herbicide for 75% Thifensulfuron-methl WG,72% 2,4-D butylate EC,50% Prometryn WP,45% Propazine-Simetryn WP,330 g·L-1Pendimethalin EC,960 g·L-1Metolachlor EC,38% Atrazine SC,setting low,medium and high levels,the efficiency for security and anti-screening test was conduccted.The results showed that:the best security was 45% Propazine-Simetryn WP,and plant control effect and fresh weight control effect reached over 90%,the proposed amount was 2 250~2 475 kg·hm-2;followed by 50% Prometryn WP and 38% Atrazine SC,the proposed amount of 50% Prometryn WP was 750~900 g·hm-2,the proposed amount of 38% Atrazine SC was 3 750~4 500 mL·hm-2;330 g·L-1Pendimethalin EC and 960 g·L-1Metolachlor EC showed serious phytotoxicity,They could not be used in millet field of chemical weed control;75% Thifensulfuron-methl WG and 72% 2,4-D butylate EC were invalid for grass weeds,they were not recommended applications alone.