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落叶松大蚜Cinara sp.是落叶松幼龄林的一种主要害虫,习性多聚集,刺吸危害落叶松嫩枝嫩叶,尤其是3～4龄幼树,由于落叶松大蚜的危害,可使主梢枯死而失去顶端优势,严重影响幼树的生长。经观察,异色瓢虫Harmonia(Leis)axyridis(Pallas)是落叶松大蚜的主要天敌种类之一,对落叶松大蚜种群的自然控制作用十分显著。为了进一步确定其与被捕食者之间的关系,更好地利用其捕食潜能,我们于1988年8月4日至10日对异色瓢虫成虫在不向猎物密度下的捕食功能进行了测定,试图为落叶松大蚜的综合管理提供参考。现将试验结果总结如下。
Larch Larvae Cinara sp. Is a major pest in young larch plantations, habitual aggregation, puncturing and damaging young leaves of larch branches, especially 3 to 4 saplings, due to the damage of larch aphids, Can make the main tip dead and lose the top edge, seriously affecting the growth of saplings. It has been observed that Harmonia (Leis) axyridis (Pallas) is one of the main natural enemies of Larix aphids and has a significant natural control effect on Larvae. In order to further determine its relationship with the predator and to make better use of its predation potential, we measured the predation function of adult C. heterophyllus at non-quarry density from 4 to 10 August 1988 , Trying to provide a reference for the comprehensive management of larch aphids. The test results are summarized below.