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小黑花蝽Orius minutus L.在我国分布很广,可以捕食许多种作物上的蚜虫、叶螨、蚧类以及鳞翅目中某些害虫的幼虫和卵等。1964年我们曾在未进行化学防治的苹果树上发现它们对苹果叶螨Panonychus ulmi(Koch)的捕食能力很强,是一种很有利用前途的捕食性天敌,有必要进一步调查、观察它的生物学及其在苹果园中的捕食作用,以便为改进苹果害虫综合防治措施提供可资利用的基础资料。为此,我们于1980年在辽宁省兴城地区进行了这项工作,现将结果总结如下。 一、数量消长
Orius minutus L. is widely distributed in our country and can prey on the larvae and eggs of some pests such as aphids, spider mites, scales and Lepidoptera in many crops. In 1964 we found on apple trees without chemical control their predatory ability to Panonychus ulmi (Koch), a promising predatory natural enemy and necessitated further investigation to observe its Biology and its predation in apple orchards in order to provide basic information for the improvement of apple pest integrated control measures. To this end, we conducted this work in Xingcheng, Liaoning Province in 1980, and the results are summarized as follows. First, the number of growth and decline