Population Dynamics Of Aleurodicus Disperses Russell And Its Influence On Local Arthropod Community Structure

Population dynamics of spiraling whitefly, Aleurodicus disperses on Bauhinia blakeana and Psidium guajava and the local arthropod community structures on the two host plants were studied by random sampling in the field, in Haikou, Hainan. The results showed:(1)In haikou, Hainan, the A. disperses could observed throughout the year, with high population numbers were observed from May to August, and also in November.(2)A. disperses feeding on different levels will have an impact on guava leaf chlorophyll.(3)No enough number of natural enemies to control the A. disperses.(4)The A. disperses will not directly change the local arthropod community structures.(5)No significant differences of herbivorous insects and predators were observed between the damaged and non-damaged host plants over the year.(6)The population number of arthropods increased on two host plants when the plants were damaged by the A. disperses, and the community composition of arthropods was changed.(7)Colonies of A. disperses, will change the annual occurence of arthropod community on two host plants.(8)On Bauhinia variegate L. species richness of arthropod community increased with the Number of A. disperses, but not obvious on Psidium guajava L.(9)Both the species diversity index and evenness index of the community were lowest on healthy plant, B. variegate, but the differences in diversity index between healthy and damaged plants of P. guajava are not very great.(10)The ecological dominance is rather high on all host plants, and it not increased with increasing of A. disperses.