摘要
This study aimed to explore the effect of 5% tembotrione oil dispersion(OD)-38% atrazine suspension concentrate(SC) tank mixture on the weeds in spring maize fields and the safety of the mixture. To be specific, randomized block design was adopted for the field experiments. The results showed that the application of tankmixture of 5% tembotrione OD at 90 g a.i./hm^(2)and 38% atrazine SC at 570 g a.i./hm^(2)and the mixture of 5% tembotrione OD at 90 g a.i./hm^(2)and 38% atrazine SC at 1140 g a.i./hm^(2)respectively controlled 94.7%~96.3% and 94.0%~96.3% of the grass weeds, 94.7%~96.0% and 93.7%~95.7% fresh weight of grass weeds, 95.3%~96.3%and 93.3%~97.3% of broadleaf weeds, and 94.7%~96.0% and 93.3%~96.3% fresh weight of broadleaf weeds. The efficacy was better than that of the 5% tembotrione alone and the control herbicide and no phytotoxicity of the mixtures was identified.The tank mixture of tembotrione and atrazine should be promoted in the spring maize field for weed control and the recommended dosages were 90 g a.i./hm^(2)for 5%tembotrione and 570 g a.i./hm^(2)for 38% atrazine.
为探明5%环磺酮可分散油悬浮剂与38%莠去津悬浮剂混用对春玉米田一年生杂草的防效及对玉米的安全性,采用随机区组试验进行田间药效试验。结果表明:5%环磺酮90 g a.i./hm^(2)与38%莠去津570、1 140 g a.i./hm^(2)混用进行春玉米播后杂草防除处理,施药后30 d对禾本科杂草株防效分别达94.7%~96.3%、94.0%~96.3%,对禾本科杂草鲜重防效分别达94.7%~96.0%、93.7%~95.7%;对阔叶杂草株防效分别达95.3%~96.3%、93.3%~97.3%,对阔叶杂草鲜重防效分别达94.7%~96.0%、93.3%~96.3%;防效优于5%环磺酮单剂和对照药剂,对玉米无明显药害。因此,环磺酮与莠去津混用可在春玉米田杂草防除中推广应用,推荐用量为5%环磺酮90 g a.i./hm^(2)+38%莠去津570 g a.i./hm^(2)。
