Abstract:

In order to determine the adaptability of Bemisia tabaci and Trialeurodes vaprorariorum to different host plants in Shandong provience, distribution was studied through investigating the occurrence in field of the two insect pests in Chengyang of Qingdao, Laiyang of Yantai and Zoucheng of Jining, and the survival ratio of the two insect pests feeding on eggplants, tobacco, cucumber and tomato was studied in the laboratory from 2007 to 2008. The results showed that B. tabaci caused serious damage in Laiyang, while T. vaprorariorum was not commonplace; T. vaprorariorum was the dominant specie in Chengyang, while B. tabaci were seldom found; B. tabaci and T. vaprorariorum almost took the same percentage in Zoucheng, but the host plants of former distributed more widely. The indoor survival ratio of T. vaprorariorum feeding on tomato and tobacco was significantly lower than that of T. vaprorariorum feeding on the other two host plants, and only when feeding on tomato, the indoor survival ratio of B. tabaci was lower. The experiment indicated that there were different adaptability of B. tabaci and T. vaprorariorum in different areas and host plants.