Effects of the Beauveria bassiana GZGY strain on the pathogenicity and reproduction of Polyphagotarsonemus latus
Author of the article:ZHANG Yan-Nan, BI Si-Jin, LI Yue, WU Sheng-Yong, WANG En-Dong, XU Xue-Nong
Author's Workplace：College of Life Sciences, Mianyang Normal University
Key Words：Beauveria bassiana; broad mite; biological control; fecundity; life table parameters
Abstract：
Abstract [Objectives] To explore the pathogenicity of the Beauveria bassiana GZGY strain on Polyphagotarsonemus latus, and investigate the effect of exposure to a median, lethal concentration of that strain on the growth and development of P. latus. [Methods] The leaf immersion method was used to compare the pathogenicity of the B. bassiana strains, GZGY, Q2505 and ACCC30006 on P. latus. The life table method was then used to investigate the effect of the most virulent strain on the growth and development of P. latus. [Results] The corrected mortality of GZGY strain against P. latus was significantly higher than that of the other two strains, and the median lethal concentration (LC50) was 4.6×106 per mL. P. latus infected with a median lethal concentration (LC50) of the GZGY strain had a 14.5% longer generation time, a 49.8% shorter life span, and a 33.3％ lower intrinsic rate of increase (rm), than the control group. [Conclusion] The B. bassiana GZGY strain had the highest infectivity against P. latus and could be a potential biocontrol agent for this pest in China.