The Prediction of Fundatrigena Emergence Period of Schlechtendalia chinensis and Its Utilization

At the condition of 10～26 ℃,the development period of female generation corresponds to the accumulated temperature theorem.The threshold of development of female aphid is 3.6 ℃±1.1 ℃,the effective accumulated temperature is 358.7(d ℃).According to the parameters of biotemperature and theoretical equation,the development period of female generation can be predicted.The emergence period of fundatrigena can be controlled so as to correspond with the suitalbe phonological period of Rhus chinensis ,by means of regulation the storage temperature condition.It would achieve good result if the emergence period of fundatrigena corresponding to the phonological period of host tree,when the 3rd～8th leaves of Rhus chinensis is breaking successively.The ability endurance to starvation is very weak.Fundatrigena can only survival around 2 d.Therefore,the bags should be put up on to host tree without any delay at the beginning of the emergence period.