天山野苹果林苹果小吉丁虫生真菌调查

Entomogenous Fungi of Agrilus mali Matsumura in Wild Apple Trees in Tianshan Mountain

以天山野苹果林苹果小吉丁虫为调查对象,采用野外调查、采样和室内分离、鉴定相结合的方法,研究了天山野苹果林苹果小吉丁虫的危害程度及其虫生真菌的种类。结果表明:新源县苹果小吉丁虫虫口密度为0.76头·m^(-1),巩留县为2.72头·m^(-1);导致苹果小吉丁虫死亡的原因排序为物理致死>天敌寄生>真菌侵染>其它;从56份样本中分离得到41株真菌,隶属于4目7属,其中曲霉属(Aspergillus)和链格孢属(Alternaria)真菌数量最多;不同季节样本中都分离到了虫生真菌,夏季得到的真菌种类和数量最多。天山野苹果林苹果小吉丁虫中存在一定数量的虫生真菌,应将虫生真菌作为苹果小吉丁虫生物防治的新方法,进行更加深入的研究。

Agrilus mali Matsumura in wild apple trees in Tianshan Mountain was the investigation object. Its damage degree and the kinds of entomogenous fungus were investigated by the method of the combination of field investigation, sampling and indoor isolation, identification. The results showed that the population density of AgriIus mali Matsumura was 0. 76 head · m-1 in Xinyuan county and 2.72 head · m-1 in Gongliu county. The sequence of death causes of Agrilus mali Matsumura was physical lethal〉insectparasite〉fungi infection〉 others. A total of 41 fungus had been isolated from 56 samples and belonged to 4 orders 7 genus, in which Aspergillus and Alternaria were the most. Entomogenous fungi could be isolated from different seasons and was the most in summer. There were a set number of entomogenous fungus of Agrilus mali Matsumura in wild apple trees in Tianshan Mountain.And entomogenous fungi as a new method of biological control of Agrilus rnali Matsumura should be further investigated.