Studies On The Dynamics Of Arthropod Communities In Plantation Of Xuan Cheng's Papaya

Based on the thorough investigation, the dynamics of the arthropod communities in two different management level and interaction of main insects with its natural enemies were studied by means of community analysis, path analysis and geostastics. System research the group falls the structure of papaya of xuan forest .1 T-test of the arthropod community in A-B different management forest.The result showed that only individual and pielou evenness have significance.others diversity index of arthropod community have no significance. Variance analysis of different management forest.The result showed that the species between the control field and no control field have significance with net research,the species were no significance in dynamics of arthropod communities.2 The arthropod community was divided into three sub-communities, which were phytophages, predators, parasitoids and neutralities. The results were showed 115 species in papaya of xuan forest.In management badly A forest 89 species arthropod belonging to 45 families and 54 species of phytophages belonging to21 families ,28 species of predators belonging to 19families. In management B well forest 87 species arthropod belonging to 43 families and 53 species of phytophages belonging to20 families ,26 species of predators belonging to 17families.The Superiority harmful insectis M.persica.Main Superiority natural enemy is Erigonidium graminicoium and Chrysopa sinica Tjeder. Dominance of every sub-community showed phytophages> predators > Parasitic and neutrality. and dominant concentration of every sub-community showed phytophages > predators >Parasitic and neutrality.3. In different papaya forest, 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 individual (0.65651),species richness.( 0.6389) by path analysis.4. Diversity indexes of arthropod communities in manages extensively A were analyzed by clustering and optimization partitions.D=1.75 Total community were divided into four stages.The first stages inclubed Macth, August and July.The second stages inclubed April, Septeber,Octeber,June,November.The third stages inclubed May,the forth stages inclubed December . In manages well B forest were analyzed by clustering and optimization partitions.D=1.87 Total community were divided into four stages.The first stages inclubed Macth, November, April, July..The second stages inclubed May Septeber.The third stages inclubed December.the forth stages inclubed June August Octeber.