20种茎叶处理除草剂对冬小麦田宝盖草的防效及安全性测定

为筛选防除冬小麦田宝盖草的高效茎叶处理除草剂,本试验连续两年选取20种除草剂进行冬小麦田宝盖草的防除研究。结果表明,在小麦返青期施药,200 g/L氯氟吡氧乙酸异辛酯乳油、50%吡氟酰草胺水分散粒剂和10%苄嘧磺隆可湿性粉剂有效成分用量分别为210、120和60 g/hm~2时,药后40 d对宝盖草的株防效和鲜重防效均达到90%以上,并且对冬小麦表现安全,可大面积示范推广。

Control effects and safety evaluation of twenty foliar applied herbicides on Lamium amplexicaule in winter wheat field

For screening efficient foliar applied herbicides on Lamium amplexicaule L. in winter wheat field, we selected 20 foliar applied herbicides to control L. amplexicaule for two years. The results showed both the plant and fresh weight control efficacies were more than 90% on L. amplexicaule in winter wheat field after 40 days treatment when fluroxypyr-meptyl 200 g/L EC, diflufenican 50% WG and bensulfuron methyl 10% WP were applied at the effective dosages of 210, 120 and 60 g/hm2 in the reviving period, respectively. These herbicides were safe to wheat at the recommended dosages, which should be demonstrated and extended in winter wheat field.