| Based on the thorough investigation, the dynamics of the arthropod communities of Prunus Cerasifera and interaction of main insects with its natural enemies were studied by means of community analysis, path analysis and geostastics. These provided theory foundation for SPM.1 The arthropod community was divided into three sub-communities, which were phytophages, predators, parasitoids and neutralities. The results were showed 50 species of arthropod belonging to 42 families and 25 species of phytophages belonging to 21 families ; 19 species of predators belonging to 13 families. The relative abundance of phytophages was 0.9782. Aphididae and Eumolpidae were dominant insects of phytophages. The relative abundance of predators was 0.0208. Coccinellidae and Theridiidae were dominant enemies of predators. Dominance and dominant concentration of total communities were 0.9550 and 0.9126 respectively. Dominance and dominant concentration of every sub-community showed phytophages > predators > Parasitic and neutrality.2 The seasonal dynamics of sub-communities was in consistent with the total community; the tendency was from high to low, to high again. Hill diversity index was in relation to species, individuals, dominance, dominant concentration, Pielou evenness and species richness. Hill diversity index was most relative with dominant concentration(-0.9769),dominance(-0.9769),Pielou evenness(0.9660) by path analysis. Principal components analysis coordinates analyzed indexes of communities; the results revealed diversity, specie , species richness and individual number were synthetic indexes of community construction .3 Diversity indexes of arthropod communities were analyzed by clustering and optimization partitions.D=1.98 ,Total community were divided into four stages: I: 3.26,4.23,6.4,6.18,7.16,7.30; II: 4.9; III: 5.7,5.21,8.26,9.10,9.24,10.8; IV: 7.2,8.12,10.22,11.5,11.19,12.3,12.7; The optimization partitions in the arthropod total communities were 3.26～4.23, 5.7～5.21, 6.4～7.30, 8.12～10.8, 10.22～12.17.The result of the optimization partitions of phytophages sub-community was 4.11～5.22,5.31～6.12,6.21～7.11 and 7.24～10.15. The result of the optimization partitions of predators sub-community was 4.11～5.12,5.22～7.11,7.24～9.12 and 10.15. The characteristic parameters of arthropod community were analyzed with the method of principal component analysis. For the three kinds of communities, the absolute values of normalized regressive coefficient of N,S,H,R had greater contribution.4 Study on the relationship of Hyalopterus arundinis and Harmonla axyridis by The aggregation indices, the result showed Harmonla axyridis was its dominant enemy. The characteristics of community structures of Hyalopterus arundinis and Harmonla axyridis after treated with Imidacloprid,KKY,azadirachtin were analysed and compared. The results showed that the deversity indexes and evenness of arthropod communities of Imidacloprid,KKY,azadirachtin treatments were lower than those in non-spraying plots; while the dominance and dominant concentrations of higher than those in non-spraying plots. Control effects of 1500 folds and 500 folds KKY on Hyalopterus arundinis were better than others.5 The dynamics of population of Ceoporus variabilis (Baly) was analyzed that it occurrenced during the last ten days of May and the first ten days of September .Study on spatial construction of Ceoporus variabilis (Baly) by geostastics from May to September, its semi-variance models were spherical. The ranges of spatial dependence of Ceoporus variabilis (Baly) was 65.0287～20.2938. Spatial construction of Ceoporus variabilis (Baly) showed aggregated distribution at different periods.
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