Sensitivity of Fusarium verticillioides isolates from rice to a novel cyanoacrylate fungicide

文献类型： 外文期刊

第一作者： Chen, Yu

作者： Chen, Yu;Zhang, Ai-Fang;Wang, Wen-Xiang;Gao, Tong-Chun;Chen, Yu;Huang, Ting-Ting;Chen, Chang-Jun;Hou, Yi-Ping;Zhou, Ming-Guo

作者机构：

关键词： Fungicide JS399-19;Fusarium verticillioides;Baseline sensitivity;Seed treatment;Rice bakanae disease

期刊名称：CROP PROTECTION （ 影响因子：2.571； 五年影响因子：3.11 ）

ISSN： 0261-2194

年卷期： 2012 年 39 卷

页码：

收录情况： SCI

摘要： The baseline sensitivity of Fusarium verticillioides to the novel cyanoacrylate fungicide 2-cyano-3-amino-3-phenylancryic acetate (experimental code JS399-19) was established, and its impact on the germination of rice seeds and efficacy in controlling rice bakanae disease by seed treatment were evaluated. The EC50 values for JS399-19 inhibiting mycelial growth of wild-type E verticillioides isolates ranged from 0.162 to 0.559 mu g/ml (a 3.5-fold difference between the lowest and highest value), and the average (+/- SE) EC50 value was 0.316 +/- 0.072 mu g/ml. The sensitivity curve was unimodal over the sensitive range and the sensitivity data can be used as a baseline for monitoring any future changes in sensitivity to JS399-19 by E verticillioides populations. Germination of healthy seeds was greater than 77% for all the selected cultivars, and was unaffected by treatment with JS399-19. Treatment of infected seeds (harvested from diseased plants) with all concentrations of JS399-19 in this study significantly decreased the abnormal elongation and damping-off of seedlings in plastic bottles in the greenhouse, indicating that JS399-19 has excellent efficacy in controlling rice bakanae disease, and was safe to rice seeds. It could be used as a disinfectant of rice seeds infected by E verticillioides. The results also suggested that the E verticillioides isolates exhibited little sensitivity shift to this fungicide after a single application. If properly applied, JS399-19 might be used as a major fungicide or a good companion fungicide for the control of rice bakanae disease in China. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.

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