11种草甘膦助剂除草活性筛选

Filter experiment on weeding activity with eleven glyphosate adjuvants

为从11种不同助剂配方的草甘膦制剂中甄选出性能优异的配方,用生物测定的方法,对具有不同助剂的草甘膦制剂在低温条件下的药效作用速度和最终活性大小进行评价。试验选用易于生长控制的大小龄期2批小麦Triticum sestirum作为供试靶标,用自动生测喷雾塔进行梯度剂量处理,后置于9.9-19.8℃,相对湿度为50%-70%的人工气候室内培养15 d,再进行目测和鲜质量结果分析。试验结果认为,编号为JB-7和JB-4的2个药剂在作用速度和最终药效发挥上都有很好表现,选定为最佳药剂,JB-6和JB-11为第2梯队品种。筛选出的4个药剂需要进入田间进一步研究。该方法可用于药效接近药剂的筛选,具有简便、可行的特点。

The biological activity and active speed of 11 glyphosates with different adjuvants at low temperature were evaluated to select the best adjuvants through biological screening. The experiment was conducted on wheat at two different growing stages. Wheat was treated with the glyphosates from an auto-spray tower with a gradient dose, then cultured at 9.9 - 19.8℃ and 50% - 70% relative humidity in a phytotron for 15 d. The treated wheat were analyzed visually as well as by the lethal rate of fresh weight. Results indicated that the JB-7 and JB-4 were the best glyphosate adjuvants with JB-6 and JB-11 the next best. However, this result should be verified with field tests. This method was simple and feasible and could be used to screen out other herbicides with similar results.