Research on the control effect of Beauveria bassian in common pests in frigid region

摘要

Study on the control effect of B. bassiana on 4 kinds of pests of conservatory pests in frigid region. The content of B, bassiana was measured by plate counting method. B. bassiana was prepared into 5 concentrations of fungal suspension, named as G_1 to G_5, and LD_(50) lethal dose for experimental measurement standard, selecting median lethal concentration. The results showed that B. bassiana had significant effect on the death of 4 kinds of pests of conservatory, and G_1 lethal rate was as high as 62%; the lethality of G_3 was 50%; G_5 had the lowest mortality rate that was 34%. Therefore, in the control of pests of conservatory in frigid region, B. bassiana, which was between G_1 and G_5, can be formulated as a biological pesticide for the control of conservatory damage by pests, but taking the control effect and the dosage of biological pesticides and many other factors into account, the experiment proved it was more suitable that concentration of B. bassiana strain G_3 suspension.