Study on Insect Communities and Diversity in Kongtong Mountains

The research on insect communities and diversity in Kongtong Mountain was made in the paper.The results are: 1) There are 909 species insects,belonging to 16 orders,107 families,and 466 genera.Among them,there are 160 natural enemy insect species,belonging to 9 orders,32 families,70 genera.The other pest insects and natural enemy insects' proportion is 4.7∶1,and the control effect of natural enemy insects on pest insects is remarkable.The natural enemy insect species are 17.60% in the whole insect species.There are economical,medical,edible,pollination,ornamental insects in the mountains,and among them there are 79 species newly recorded in Gansu Province.Lepidoptera,Coleoptera are two majorities.2) Insects species diversity index is changeable all the time.Lepidoptera index is in the first position and its d=58.76.Coleoptera index is the second position and its d=30.26.The change range of diversity index is 58.76%.The species diversity index is positively correlated with the predominance degree of insect in Kongtong Mountain.