Control effect of Metarhizium anisopliae complex preparation agent on grassland locust

Metarhizium anisopliae, an important entomopathogenic fungus, is used for biological control. Two groups, 2.5% of M. anisopliae complex preparation agent (clBioc) and 4.5% of Cypermethrin, were designed to test the control efficiency on grassland locust. And each group included 3 concentration levels (450 mL/hm2, 600 mL/hm2， 750 mL/hm2). The results indicated that the M. anisopliae agent showed excellent control efficiency at 3 concentration level. The control efficiency of 4.5% Cypermethrin at 450 mL/hm2 of concentration was not significantly different from that of M. anisopliae agent, so the latter could be used while the locust density was lower. The control efficiency of 4.5% Cypermethrin at 600 mL/hm2 of concentration was not significantly different from that of M. anisopliae agent at 750 mL/hm2 of concentration, so the latter could be used while the locust density was higher.