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首次报道美国白蛾Hyphantria cunea(Drury)的一种捕食性天敌——蠋敌Arma chinensis(Fallou),简述了蠋敌的生物学特性。在商河县,蠋敌在美国白蛾幼虫网幕枝中的分布率为2.33%～17.86%;记述了蠋敌的捕食习性和规律,经室内饲养,统计出各龄若虫和成虫的捕食量,从若虫到成虫,最大捕食量为2头3龄、7头4龄、5头5龄、23头6龄共37头白蛾幼虫;最小取食量为4头2龄、8头3龄、1头4龄、1头5龄、2头6龄共16头白蛾幼虫;分析并指出蠋敌对美国白蛾具有较强的控制能力,是自然界中影响美国白蛾种群密度的重要因子。
For the first time, a predatory natural enemy, Arma chinensis (Fallou), a predatory natural enemy of Hyphantria cunea (Drury), was briefly described and its biological characteristics were briefly described. In Shanghe County, the predation rate was 2.33% ~ 17.86%. The predation habits and laws of predatory enemies were recorded. After feeding indoors, the predation amount of nymphs and adults of each instar was calculated , From nymphs to adults, the maximum predation amount was 2 3rd instar, 7th 4th instar, 5th 5th instar, 23th instar 6th instar and 37 white moth larvae. The minimum feeding amount was 4 2nd instar and 8 3rd instar , A fourth instar, a fifth instar, two six-instar larvae of six white moths. It was analyzed and pointed out that Eupolyphaga had a strong control over the white moth, which is an important factor that affects the population density of the white moth in nature.