Beauveria bassiana wettable powder for preventing and treating prodenia litura and preparation method thereof

The invention relates to beauveria bassiana wettable powder for preventing and treating prodenia litura and a preparation method of the beauveria bassiana wettable powder. The wettable powder is prepared from spore powder of beauveria bassiana JH19, a wetting agent NNO, a dispersing agent sodium carboxymethyl cellulose, an ultraviolet protective agent dextrin and a carrier talcum powder. On the basis of obtaining an excellent strain JH19 with high fatality rate for second-stage larvae of prodenia litura through screening research, a carrier and an auxiliary agent with relatively good biocompatibility for beauveria bassiana are further screened out, and a formula of the wettable powder is determined, so that the produced product not only can keep the activity of the strain, but also can be used for preparing the wettable powder. The pesticide effect of the preparation can be improved, the lasting time of the pesticide is prolonged, and the control effect on prodenia litura is improved. The method has good appl