随着兰州市人工林面积不断增加，林业害虫的发生日趋严重。采用样线法对兰州城区北山林区的虫害发生情况开展了调查，为兰州市林业虫害防控提供数据支持和科学依据，结果表明，本次调查共鉴定出兰州城区北山林区的害虫多样性高，共有5目 41 科 87 种，其中鞘翅目、半翅目和鳞翅目科数和物种数均占有明显优势，是不同林区昆虫群落的优势种。食叶害虫种类最多，占比为32%；蛀干害虫种类次之，占比为27%，枝梢害虫、球果害虫种类较多，占比分别为19%、16%，地下害虫种类最少，占比为6 %。城区北山3个林区害虫的Shannon-Wiener多样性指数和Margalef丰富度指数均以九州台林区最高，为4.87和0.84。仁寿山林区与九州台林区的害虫群落相似性指数最高，为0.456，仁寿山与白塔山的相似性指数最低，为 0.389。

With the increase of artificial forest area in Lanzhou City, the occurrence of forestry diseases and insect pests has intensified. In order to clarify the species and distribution of forest diseases and insect pests, this study conducted a resource survey of diseases and insect pests on artificial forestusing transect and trapping methods in north mountain of Lanzhou urban area. The results showed that there were 87 species of pests detected, belonging to 41 families, 5 orders, among these, Coleoptera, Hemiptera Lepidoptera, whether in terms of the number of families or species, exhibited significant dominance and were identified as the dominant orders in insect communities across different forest areas.The leaf eating pests and stem boring pests were the richest, all accounting for 27%, branch pests, fruit pests and underground pests accounted for 19%, 16% and 6%, respectively. The Shannon-Wiener index and Margalef index of pests in the 3 forest areas in the northern mountainpeaked in Jiuzhoutai, which were 4.87 and 0.84, respectively. The insect community similarity index between Renshou Mountain and Jiuzhoutai was the highest, at 0.456, while the similarity index between Renshou Mountain and Baita Mountain was the lowest, at 0.389.

S763.3

兰州市科技局科技计划项目(2022-2-49)。