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多异瓢虫是有益的天敌,在农田中出现早、越冬迟,数最多,占各类瓢虫总数的55.0—86.8％,对麦蚜能起到一定的控制作用。据1988—1989年室内饲养观察.弄清了多异瓢虫的食蚜量及其生活习性。一、饲养方法 5月中旬,将田间采集的多异瓢虫分开雌雄编号装入干净的罐头瓶内,同时放进蚜虫,观察食蚜量。二、饲养结果室内饲养以自然光照为主,最适温度18—25℃,相对湿度50-60％。在这种生态条件下,雌性瓢虫比雄性瓢虫食量大,在日平均温度25.8℃的情况下,雌性瓢虫日食蚜平均50头左右,雄性瓢虫日食蚜平均41头。随着外界气温的下降,瓢虫食蚜量逐渐减少。
The ladybugs are beneficial natural enemies and appear early and late winters in farmland, accounting for 55.0-86.8% of the total number of all kinds of ladybugs. They can play a certain role in controlling wheat aphids. According to the observation of indoor rearing in 1988-1989, the amount of aphid-feeding ladybirds and their living habits were ascertained. First, the breeding method In mid-May, the field collection of the different ladybugs separate male and female number into a clean canned bottle, while aphids, the amount of aphids observed. Second, breeding results Indoor feeding to natural light-based, the optimum temperature of 18-25 ℃, relative humidity of 50-60%. Under this ecological condition, female ladybugs had a larger appetite than male ladybugs, with an average of about 50 female Japanese ladybugs and an average of 41 male Japanese lady-beetle aphids at a daily average temperature of 25.8 ° C. As the outside temperature dropped, ladybug aphid gradually reduced.