异色瓢虫Harmonia axyridis(pallas)生物学初步研究

Study on the Bionomics of Harmonia Axyridis(pallas)

通过对异色瓢虫的田间观测及室内饲养，对其生物学特性进行研究。在通辽地区异色瓢虫Harmoniaaxyridis（pallas）一年发生3－4代，以成虫越冬。异色瓢虫的卵期3－4天，孵化率92％。幼虫期共四龄。异色瓢虫为通辽地区蚜虫天敌的优势种类。

After the clarification of real species, some of Harmonia axyridis (pallas) bionomiccharacteristics were studied. The results showed that there were 3 or 4 generations a year inTongLiao, it overwinters with adult. Most of the eggs with 3 -4 days of egg stage, the rate ofnatching in 92 Per cent. The carvae go throagh 4 stadia singes. Harmonia axyridis (pallas) isdominant speaes for the natural enemies of phytophthira in TongLiao area.