Abstract: On the controlled condition of 26℃ and RH 70％ ，we investigated the absorption function of the egg pedicel of tobacco whitefly，Bemisia tabaci(Gennadius)(Homoptera：Ahyrodidae)．Firstly，we studied the efect of pesticide on development of egg laid on the artifical membrane apparatus and on plant which root was immersed in pesticide．As a result，we found the disadvantage of pesticide on development of whitefly eggs significantly，the eggs on artifical membrane with pesticide were dead entirely，but eggs development well on control，Secondly，we investigated the effect of different
plants on develolmlent of egg，results showed that there were significant difference on survival and development duration on eggs ovipesit on different plants，and the sequence of plants on which the survival of eggs from high to low was cabbage>cucumber>capsicum>eggplant>corn, the sequence of plants on which development duration of egg from long to short was cabbage>cucumber>eggplant>capsicum>corn．Lastly, we transferred the 1st larva which hatched from the eggs laid on the above different plant to the other common plant，tomato plant，and observed their development，the result showed that the duration sequence of 1st instar from long to short was on apsieum>cabbage>cucumber>eggplant．It is sugested that the substance ofmedium entered into the egg through whitefly egg pedicel，and it affect the development of whitefly egg and the following 1st larva．

Key words: Bemisia tabaci, egg development, artifical membrane oviposition apparatus, pesticide, host plant