三种杀螨剂及其复配对苹果全爪螨的田间防效

Effects of Three Kinds of Miticides and Their Compounds Against Panonychus ulmi Koch in Field

以当前常用的3种杀螨剂螺虫乙酯、螺螨双酯、乙螨唑及其复配药剂为研究对象,采用随机区组设计,在苹果园进行了苹果全爪螨(Panonychus ulmi Koch)田间防治试验。结果表明:20%螺螨双酯悬浮剂和22.4%螺虫乙酯悬浮剂,不论是单剂还是与其它药剂混用,其速效性和持效性均很好;110g·L^(-1)乙螨唑悬浮剂单独使用速效性很差,不能迅速的降低螨口密度,需要与速效性好的杀螨剂联合使用。

Three kinds of commonly used acaricides spirotetramat,spirodiclofen diester,etoxazole were used as test materials,their effects against the Panonychus ulmi Koch in field were studied by using randomized block design.The results indicated that the rapidly availability and persistence of 20% spirodiclofen diester and 22.4%spirotetramat suspending agent were good whether they were single dose or mixed with other pesticides.The rapidly availability was very poor when 110g·L^-1 etoxazole suspending agent used alone,and it could not rapidly reduce mites density.It needed to be used with other readily available acaricides.