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在加拿大魁北克的商业苹果园,每年只喷一次杀螨剂(Eostanian等,1984)。因此,所需要的杀螨剂不仅应用于防治害螨,并凡应易于与目前的害虫综合防治措施结合起来。 Lienk(1984)指出,植食螨对生长初期苹果树的危害是大。因此,有必要研制各种生态学选择性杀螨剂(Croft等,1983)。一种杀螨剂在生长季初期,当缺乏天敌而害螨猖獗时应该是有效的。
In commercial apple orchards in Quebec, Canada, only acaricide is sprayed once a year (Eostanian et al., 1984). Therefore, the required acaricide should not only be used to control pest mites, but should be easily combined with the current integrated pest management measures. Lienk (1984) pointed out that phytosanitary mites on the growth of early apple trees is a big harm. Therefore, it is necessary to develop a variety of ecologically selective acaricides (Croft et al., 1983). An acaricide should be effective in the early stages of growing season when pests are rampant in the absence of predators.