Influence of incubation and inoculation temperatures on the epizootic of Spodoptera exigua nuclear polyhedrosis virus A Preliminary Survey on the Epizootics of Infection of Nosema locustae among Grasshoppers in Rangeland THE CONTROL OF PINE CATERPILLAR (DENDROLIMUS TABULAEFORMIS AND D·SPECTABILIS)WITH PAECILOMYCES FARINOSUS AND ITSEPIZOOTIC PROBLEMS Development of Zoophthora anhuiensis induced epizootic in Myzus persicae colonies and an analytical model to describe its trend Influence of temperature and relative humidity on epizootiological features of Zoophthora anhuiensis in Myzus persicae colonies Influence of host age on the epizootic of nuclear polyhedrosis virus of Spodoptera litura The control effect of Spodoptera exgiua nuclear polyhedrosis virus on its host population