15%噻磺隆防除春小麦田杂草效果评价

Evaluation of Thifensulfuron-methyl on Controlling Weeds in Spring Wheat Field

为探索15％噻磺隆可湿性粉剂防除春小主田阔叶杂草的效果及对春小麦的安全性进行了田间小区试验。结果表明，15％噻磺隆可湿性粉剂商品用量为300~450g/hm^2时对春小麦田的蓼、本氏蓼和苍耳的综合株数防效达到83％～89％，综合鲜重防效达到93％～98％。适宜的施药时期为春小麦出苗后4～5叶期，阔叶杂草基本出齐，株高不超过5cm．适宜的用药量为15％噻磺隆可湿性粉剂不低于300g/hm^2，在此推荐剂量下对春小麦安全。

The field trial on the effect of thifensulfuron-methyl on controlling broad-leaves weeds and the safety to spring wheat was conducted. The results showed that 15% thifensulfuron-methyl WP could control effectively broadleaf weeds in spring wheat fields, such as Bacon weed （Chenopodium album L. ）, Willowleaf knotweed （Polygonum bungeanum Turcz. ）, Heartleaf cocklebur （Xanthium strumarium L. ） at the dosage of 300-450 g/hm^2. The control effects of weed plant were 83% -89%, and those of fresh weight were 93%-98%. The optimum application period was in post-germi- nation, the stage of seedling was 4-5 leaves and weed plant high below 5 cm. The suitable dosage was over 300 g/hm^2 of 15% thifensulfuron-methyl WP. This dosage was safe to spring wheat.