Amount and spatial dynamics of population of　Bemisia tabaci(Hemiptera:Aleyrodidae) in different host plants

The population dynamics of Bemisia tabaci (Gennadius) in different host plants were studied.The results indicate that the times in which the populations of B.tabaci on different hosts increase to a peak are different,the ranges of population wave are also different,the order of population densities of B.tabaci on different hosts is sunflower＞pumpkin＞cotton＞soybean＞cushaw＞eggplant＞hechima＞tomato＞chili＞cucumber＞kidney bean＞corn,which indicates that B.tabaci to host-plant has definite nature selectivity.Spatial distributions of B.tabaci in cotton,sunflower and soybean fields are studied by using C=S2〖KG-*3〗/〖KG*4〗〖AKX-〗，and they are of collective distribution type.