Use of oxathiapiprolin for controlling soybean root rot caused by Phytophthora sojae: efficacy and mechanism of action
文献类型： 外文期刊
作者： Wang, Zhixin 1 ; Lv, Xin 2 ; Wang, Rongbo 2 ; He, Zibin 3 ; Feng, Wanzhen 1 ; Liu, Wenjing 2 ; Yang, Chenxiao 1 ; Wang, Zhengyang 1 ; Ke, Qihan 1 ; Tao, Kezhu 1 ; Chen, Qinghe 1 ;
作者机构： 1.Hainan Univ, Coll Plant Protect, Sanya Nanfan Res Inst,Minist Educ, Key Lab Green Prevent & Control Trop Plant Dis &, Haikou 570228, Hainan, Peoples R China
2.Fujian Acad Agr Sci, Inst Qual Stand & Testing Technol & Plant Protect, Fuzhou, Peoples R China
3.Zhangzhou Inst Agr Sci, Crop Div, Zhangzhou, Peoples R China
关键词： oxathiapiprolin; Phytophthora sojae; seed treatment; stress tolerance; translocation; ultrastructure
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.462； 五年影响因子：4.688 ）
ISSN： 1526-498X
年卷期：
页码：
收录情况： SCI
摘要： Background Oxathiapiprolin is a new isoxazoline fungicide developed by DuPont to control oomycete diseases. Although oxathiapiprolin has shown strong inhibitory activity against oomycete pathogens, little is known about its ability to control Phytophthora sojae. Results Oxathiapiprolin showed high inhibitory activity against Phytophthora sojae, with 50% effective concentration (EC50) values ranging from 1.15 x 10(-4) to 4.43 x 10(-3) mu g mL(-1). Oxathiapiprolin inhibited various stages of Phytophthora sojae development, including mycelial growth, sporangium formation, oospore production, and zoospore release. Electron microscopy studies revealed that oxathiapiprolin caused severe morphological and ultrastructural damage to Phytophthora sojae. Oxathiapiprolin affected the cell membrane and wall of Phytophthora sojae, making it more sensitive to osmotic and cell wall stress. Oxathiapiprolin exhibited translocation activity; it was absorbed by soybean roots and then translocated to the leaves. It was effective at reducing soybean Phytophthora root rot under glasshouse and field conditions. Both fungicide seed treatment and foliar spray significantly reduced disease incidence and yield losses compared with untreated controls in the field. Conclusion Oxathiapiprolin exhibits high inhibitory activity against Phytophthora sojae, and has multiple mechanisms of action including severe mycelial damage and modulation of osmotic and cell wall stress. These results indicate that oxathiapiprolin can be used at low concentrations for highly effective management of soybean Phytophthora root rot caused by Phytophthora sojae. (c) 2022 Society of Chemical Industry.
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