数字农科院2.0

Unveiling the efficacy of a novel strain of Beauveria brongniartii to manage Sitobion miscanthi (Takahashi) and Rhopalosiphum padi (Linnaeus) (Hemiptera: Aphididae) in China

文献类型： 外文期刊

作者： Xujun Tian;Saige Zhu;Xiao Ran;Xinan Li;Xiangrui Li;Yunhui Zhang;Rongyu Li;Xun Zhu

作者机构：

关键词： Beauveria brongniartii;Biological control;Entomopathogenic fungi;Wheat aphid

期刊名称： Journal of Asia-Pacific Entomology

ISSN： 1226-8615

年卷期： 2025 年 28 卷 4 期

页码：

收录情况： SCIE（2025版）

摘要： Wheat aphids, including Sitobion miscanthi (Takahashi) and Rhopalosiphum padi (Linnaeus), inflict serious damage to wheat crops. Consequently, it is necessary to find a new management option to reduce the damage caused by aphids. Entomopathogenic fungi serve as a tool to control the aphid population build-up. The current study explores a new entomopathogenic fungus that, infests S. miscanthi in China. Using morphological and molecular methods, the isolated colonies were identified as Beauveria brongniartii Sacc. (Petc) (Ascomycota: Cordycypitaceae). Bioassay studies with purified conidial suspensions further confirmed the infectivity to the adult wheat aphids. The results showed that after 6 days of treatment with a conidia concentration of 1.0 × 107 spores/mL, the mortality rates of S. miscanti and R. padi were 97.78 % and 91.11 %, respectively. However, 52.22 % of S. miscanthi and 47.78 % of R. padi adults survived after 7 days of exposure to a conidia concentration of 1.0 × 103 spores/mL of B. brongniartii. Additionally, the semi-lethal time decreased with the increase of conidia concentration of the strain. To further understand and enhance the value of B. brongniartii, we performed whole-genome sequencing and an analysis of its strain. The genome length was 2,295,663,102 bp and 316 contigs, with an average length of 7,264,756.71 bp. Moreover, database alignment identified 455 CAZyme, 1643 TCDB, and 2850 PHI genes. The current study also explored five surface proteins of B. brongniartii Y618 that worked best against wheat aphids. To our knowledge, this is the first report of the pathogenicity of B. brongniartii against wheat aphids, and it could serve as a potential candidate for an integrated pest management plan.

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