50%丁醚脲悬浮剂防治梨园红蜘蛛药效试验

50%丁醚脲悬浮剂属新型硫脲类低毒杀虫、杀螨剂,兼具内吸和熏蒸双重作用。为寻求替代乳油农药制剂的水基化杀虫、杀螨剂新品种,进一步开发50%丁醚脲悬浮剂的施用范围,评价其对红蜘蛛的防治效果及其合理使用剂量和安全性,2009,2010年对该药剂进行了田间药效试验,结果表明,50%丁醚脲悬浮剂防治梨园红蜘蛛,在稀释倍数为2 000倍和3 000倍的用药情况下,药后3,7,10 d的防效均在90%以上;50%丁醚脲悬浮剂防治梨园红蜘蛛,在发生始盛期用药,用稀释倍数为2 000～3 000倍液进行叶面喷雾,可有效控制红蜘蛛的为害,且有较好的速效性和持效性。

Control Effect of Diafenthiuron 50% SC against Hawthorn Red Spied in Pear Orchard

With systematic and fumigated functions,Diafenthiuron 50% SC is a new pattern low toxic thiourea pesticide and acaricide.To explore its application range,control effect against red spied,and proper applying dosage,its security was analyzed through a field experiment.The results in 2009 and 2010 years showed that the effects under 2 000 and 3 000 dilution rate were above 90% in 3,7 and 9 days after application.Use Diafenthiuron 50% SC to control hawthorn red spied at the beginning of full period under 2 000 ...