An entomopathogenic strain of Beauveria bassiana (hypocreales: Cordycipitaceae) against Eotetranychus kankitus (acarina: Tetranychidae) and its compatibility with Neoseiulus barkeri (acarina: Phytoseiidae)

作者：Mingxiu Liu, Dong Xiang, Xiaotian Feng, Xuanliang Li, Mian Wang, Zhen Wang, Hanqiu Chen, Huai Liu, Yaying Li · 发表于：Bulletin of Entomological Research · 年份：2025 · DOI：10.1017/s0007485325000057 · 被引用次数：1 · 研究领域：Entomopathogenic Microorganisms in Pest Control、Insect Pest Control Strategies、Insect Resistance and Genetics

Abstract Eotetranychus kankitus is an important pest on several agricultural crops, and its resistance to pesticides has promoted the exploration of biological control strategies. Beauveria bassiana and Neoseiulus barkeri have been identified as potential agents for suppressing spider mites. This study aimed to investigate the pathogenicity of B. bassiana on E. kankitus and its compatibility with N. barkeri . Results showed that among the five tested strains of B. bassiana , Bb025 exhibited the highest level of pathogenicity on E. kankitus . Higher application rates (1 × 10 8 conidia/mL) of Bb025 led to a higher mortality rate of E. kankitus (90.402%), but also resulted in a 15.036% mortality of N. barkeri . Furthermore, preference response tests indicated that both E. kankitus and N. barkeri actively avoided plants sprayed with Bb025 compared to the control group that was sprayed with Tween-80. In a no-choice test, we observed that N. barkeri actively attacked Bb025-treated E. kankitus with no adverse effect on its predatory capacities. Furthermore, N. barkeri laid more eggs when fed on Bb025-treated E. kankitus compared to Tween-80-treated E. kankitus , but the subsequent generation of surviving individuals fed on Bb025-treated E. kankitus was reduced. These findings demonstrate that the Bb025 strain of B. bassiana is highly virulent against E. kankitus while causing less harm to N. barkeri . Consequently, a promising strategy for controlling E. kankitus could involve the s...