Abstract: By the method of sweep netting, an investigation was made on the beetle (Insecta: Coleoptera) diversity in Pinus yunnanensis, Eucalyptus, Leucaena leucocephala, Eucalyptus+L. leucocephala, Azadirachta indica, and multiple tree species mixed plantations in Yuanmou dry-hot valley. A total of 925 beetles were captured, belonging to 71 species and 18 families. Chry-somelidae had most species, while Curculionidae had most individuals. The species richness of the beetle communities was 7-23, and the ShannonWiener index was 1.249-2.562, sugges-ting a lower insect diversity as a whole. Among the test plantations, P. yunnanensis plantation had the highest diversity of beetle communities, followed by the mixed plantation, A. indica plantation, and Eucalyptus, L. leucocephala, and Eucalyptus+L. leucocephala plantations. The restoration of multiple tree species mixed plantation was of significance in enhancing insect diver-sity.

Key words: Quercus variabilis, Age structures, Distribution pattern, Life tables, Survival curve