Sustainable management of potato tuber moth in storages using entomopathogenic fungi and an ectoparasitic mite

文献类型： 外文期刊

第一作者： Song, Yan-Fei

作者： Song, Yan-Fei;Ye, Shuai;Feng, Bing-Xia;Yang, Mao-Fa;Liu, Jian-Feng;He, Xiong Zhao;Feng, Bing-Xia;Chen, Wan-Hao;Yang, Mao-Fa;Liu, Jian-Feng;Gao, Yu-Lin

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关键词： integrated pest management; survival and reproduction; Phthorimaea operculella; Cordyceps fumosorosea; Beauveria bassiana; Pyemotes zhonghuajia

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 1526-498X

年卷期： 2025 年 81 卷 4 期

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收录情况： SCI

摘要： BACKGROUNDThe potato tuber moth (PTM), Phthorimaea operculella, is an economically important pest of potato crops worldwide. So far, the application of chemical pesticides is the major measure to manage PTM, but it induces serious deleterious impacts on the environment and human health. Here, we screened the entomopathogenic fungi that are lethal to PTM, and tested their sublethal impacts on PTM development, mortality, and reproduction as well as that of ectoparasitic mite Pyemotes zhonghuajia, a natural enemy of PTM.RESULTSAmong 13 tested entomopathogenic fungal strains in three genera, Beauveria Vuillemin, Cordyceps Fries, and Talaromyces Benjamin, Cordyceps fumosorosea (strain KY1136) and Beauveria bassiana (strain KY1115) caused a significantly higher mortality in PTM eggs, larvae, and pupae. Median lethal concentration (LC50) of both strains prolonged PTM immature development, shortened adult longevity, and reduced fecundity and life table parameters in terms of intrinsic rate of increase (rm), net reproductive rate (R0), and finite rate of increase (lambda). The LC50 value of KY1136 (1.9 x 106 spores/mL) was lower than that of KY1115 (9.0 x 106 spores/mL), indicating the greater potential for biological control of PTM by KY1136. Both strains had no significant impact on P. zhonghuajia survival and reproduction. Increasing P. zhonghuajia density reduced PTM feeding and pupation rate, while the combined application of P. zhonghuajia and entomopathogenic fungi had no additional effect in inhabiting PTM feeding and pupation.CONCLUSIONEntomopathogenic fungal strains Cordyceps fumosorosea KY1136 and Beauveria bassiana KY1115 are the potential biological control agents of PTM, but do not impose a negative impact on the natural enemy. Our study provides insights into the integrated pest management of PTM by combining the entomopathogenic fungi and an ectoparasitic mite. (c) 2024 Society of Chemical Industry.

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