農藥所112年度

五、 農藥對病蟲草害之應用研究 青蔥葉部病原真菌對殺菌劑感受性與管理策略研究 本年度完成中部蔥科作物黑腐病菌 ( Stemphylium vesicarium ) 搜集，並以其 中 14 株黑腐病菌進行氟克殺、氟派瑞、平硫瑞、氟殺克敏、百克敏、三氟敏、 三氟派瑞、白克列及白列克敏等 9 種 FRAC C 類殺菌劑之室內生物檢定試驗，於 此 9 種供試藥劑中，氟派瑞、三氟派瑞及百克敏對黑腐病菌菌絲生長的抑制效果 最好，其 EC 50 分別為 5.46 ± 9.12 、 7.27 ± 13.38 及 53.38 ± 72.23 mg/ L ，三氟敏則 幾無抑制效果 ( 表 1) 。 表 1. 臺灣中部青蔥黑腐病菌 ( Stemphylium spp.) 對 9 種 FRAC C 類殺菌劑及其 混合劑之感受性分佈情形 標的 部位 藥劑普通名稱 EC 50 (mg/ L) 1 備註 2 Mean ± SD median C2 氟派瑞 5.46 ± 9.12 1.769 12 isolates’ data conducted for EC 50 of S04, S14 were larger than 1,000 mg/L. C2 氟克殺 19.28 ± 50.41 0.217 7 isolates’ data conducted for EC 50 of S03-S05, S11-S14 were larger than 1,000 mg / L. C2 平硫瑞 1.68 ± 1.38 1.203 7 isolates’ data conducted for EC 50 of S03-S05, S11-S14 were larger than 1,000 mg / L. C2 白克列 1.68 ± 2.70 0.462 6 isolates’ data conducted for EC 50 of S03-S6, S11-S14 were larger than 1,000 mg / L C3 百克敏 53.38 ± 72.23 18.465 All 14 isolates’ EC 50 were estimated. C3 三氟敏 17.48 ± 16.04 17.480 Only S06 could be estimated. C2 + C3 三氟派瑞 7.27 ± 13.38 1.188 12 isolates’ data conducted for EC 50 of S04, S05 were larger than 1,000 mg / L. C2 + C3 氟殺克敏 13.35 ± 26.33 0.847 9 isolates’ data conducted for EC 50 of S03, S04, S11, S13, S14 were larger than 1,000 mg / L. C2 + C3 白列克敏 19.88 ± 39.36 0.660 7 isolates’ data conducted for EC 50 of S03-S6, S11, S13, S14 were larger than 1,000 mg / L. 1) EC 50 , Effective concentration for 50% inhibition in mycelial growth test. 2) Total 14 isolates of Stemphylium spp. were conducted in the bioassay test. EC 50 values were estimated from those EC 50 less than the highest concentration 1,000 mg/ L used.