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Sensitivity of Different Developmental Stages and Resistance Risk Assessment of Phytophthora capsici to Fluopicolide in China

文献类型： 外文期刊

作者： Wu, Jie 1 ; Xue, Zhaolin 1 ; Miao, Jianqiang 3 ; Zhang, Fan 1 ; Gao, Xiang 1 ; Liu, Xili 1 ;

作者机构： 1.China Agr Univ, Coll Plant Protect, Dept Plant Pathol, Beijing, Peoples R China

2.Hebei Acad Agr & Forestry Sci, IPM Ctr Hebei Prov, Inst Plant Protect, Baoding, Peoples R China

3.Northwest A&F Univ, Coll Plant Protect, State Key Lab Crop Stress Biol Arid Areas, Yangling, Shaanxi, Peoples R China

关键词： Phytophthora capsici; fluopicolide; development stages; biological traits; resistance risk assessment

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Sensitivities of Phytophthora capsici to fluopicolide were investigated in vitro, with results showing that fluopicolide had strong inhibitory activities on each development stage of P. capsici, in particular on the motility of the zoospore. The potential resistance risk for fluopicolide in P. capsici was evaluated. The baseline sensitivities to fluopicolide of 146 isolates obtained from 28 provinces in China were initially determined, and the 50% inhibition of mycelial growth (EC50) distribution was a unimodal curve with a mean of 0.17 mu g/ml. A series of fluopicolide-resistant mutants of P. capsici were obtained by fungicide adaptation, and their biological traits were determined. Most of the resistant mutants showed similar favorable fitness in mycelial growth, sporangium and zoospore production, cystospore germination, and pathogenicity compared with their sensitive parents, with few exceptions. Additionally, the cross-resistance result indicated that the sensitivity of fluopicolide did not correlate with other oomycete fungicides, apart from fluopimomide (LH-2010A). These results suggest a moderate to high resistance risk of P. capsici to fluopicolide in China.

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