Pathogenicity of Nosema locustae to Dociostaurus kraussi kraussi
Author of the article:HU Hong-Xia1** WANG Han1 SHI Wang-Peng2 YU Fei1 WANG Zhi-Yong1 JI Rong1
Author's Workplace：1. School of Life Sciences, Xinjiang Normal University, The Key Laboratory of Animal Resource Protection andPest Control in Central Asia, Urumqi 830054; 2. College of Agriculture and Biotechnology, China Agricultural University,Beijing 100000, China
Key Words： Nosema locustae, Dociostaurus kraussi kraussi, pathogenicity, respiratory metabolism
Abstract： [Objectives] To study the pathogenicity of Nosema locustae to Dociostaurus kraussi kraussi, and to provide an experimental basis for screening living hosts of N. locustae in Xinjiang. [Methods] D. kraussi kraussi were orally infected with Nosema locustae and the virulence and effects of fungal infection on the host respiratory metabolism were determined. [Results] The results show that, at a dose of 6.5×105 spores, the infection and mortality of D. kraussi kraussi were 41.7% and 72.22%, respectively. There was good correlation between infective dose and virulence of N. locustae (r2=0.961), the LD50 was 1.7088×104 spores. Compared to the control, increasing spore concentration and infection time significantly decreased CO2 emissions (P<0.05). [Conclusion] N. locustae can infect D. kraussi kraussi with high lethality and has significant effects on the hosts’ respiratory metabolism.