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自然界中存在着虫的多种天敌。人为地利用这些天敌,以减轻虫发生量和为害程度,是综合防治虫的重要措施之一。为查明虫天敌的种类及其作用,我站于一九七三年作了初步考查,结果简述如下。一、天敌种类
There are many natural enemies of insects in nature. Man-made use of these natural enemies to reduce the incidence and severity of insects is one of the important measures for integrated pest control. To ascertain the species and role of natural enemies, I conducted a preliminary examination in 1973 and the results are summarized as follows. First, the type of natural enemies