大草蛉(Chrysopa septempunctataWesmael)在我国分布很广,它是蚜虫、红蜘蛛、粉虱和松干蚧等害虫的重要捕食性天敌。为了确保“以虫治虫”在时间和数量上的要求,需要研究代饲料来维持越冬草蛉的种群或进行人工繁殖。但目前,几种饲养大草蛉产卵效果较好的代饲料都是“糊剂”。由于该类饲料在常温下不易保存,须常配制。加上草蛉取食量较少,在饲养中大部分代饲料往往干燥或变质不能被充分利用。为了解决代饲料的上述问题,1979年冬至1980年,我们在鄞县天童林场进行了大草蛉成虫 Chrysopa septempunctataWesmael widely distributed in our country, it is aphids, spider mites, whitefly and pine and other insects important predatory natural enemies. In order to ensure the time and quantity requirements for pest control, there is a need to study the use of fodder to maintain the population of wintering plants or to breed them artificially. However, at present, several types of fodder that feed on the large grass mullet tend to be better than the “paste”. Because of this type of feed at room temperature is not easy to preserve, often formulated. In addition, the herbivorous feed intake is relatively low, most of the feedstuffs in the rearing tend to be dry or degenerate and can not be fully utilized. In order to solve the above-mentioned problems of substituting feed, from 1979 to 1980, we conducted adult