Abstract:

A survey of insect community including phytophagous insects, predacious insects and parasitoid insects were finished in the jujube Orchards of Shanxi Agriculture University (Ⅰ) and Shanxi Fruit Tree Institution (Ⅱ). Their structure characters were analyzed by individual number, species richness, , dominance, diversity and evenness. The results were showed as follows. Firstly, there were 8 orders, 27 families, 34 species in the jujube Orchards of Shanxi agriculture university (Ⅰ). And there were 6 orders, 39 families, 55 species in jujube Orchards in Shanxi fruit tree institution (Ⅱ). The percent of the predatory group and parasitic group in the jujube Ⅱ was higher than the jujube Ⅰ. Secondly, the species richness, total individual number, dominance diversity and evenness of the jujube Ⅱ were higher than the same date of the jujube Ⅰ. Finaly, The time dynamics of insect community in two kind of jujube orchards were analyzed by using the system cluster analysis. The results show that the whole communities of insects were divided into two phases which were transition and withdraw phase, flouring phase.