Sensitivity of Phytophthora infestans to mandipropamid and the effect of enforced selection pressure in the field
Sensitivity of Phytophthora infestans to mandipropamid and the effect of enforced selection pressure in the field
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DOI：
10.1111/j.1365-3059.2007.01625.x
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发表时间：
2007-10-01
期刊：
影响因子：
2.7
通讯作者：
Gisi, U.
中科院分区：
文献类型：
--
作者：
Cohen, Y.;Rubin, E.;Gisi, U.
对致病疫霉中新的羧酸酰胺 (CAA) 杀菌剂双丙酰胺 (MPD) 的敏感性进行了测量，测量了 1989 年至 2002 年在 MPD 商业化使用之前在以色列收集的分离株（基线敏感性，44 个分离株），以及 2001 年至 2001 年至 9 年间在 9 个欧洲国家和以色列经 MPD 处理的田地（25 个分离株）和未处理的田地（215 个分离株）中收集的分离株。 2005.所有分离株对MPD敏感，EC50值范围在0.02至2.98μg·mL(-1)之间。 2001-05年期间进行的塑料隧道（英国）、遮荫室（以色列）和田间实验（以色列）表明，通过对致病疫霉混合分离株重复亚致死剂量（5μg·mL(-1)）或过量（500-1000μg·mL(-1)）MPD施加预防性或治疗性强制选择压力，没有产生对该化合物具有抗性的分离株。这项研究的结果表明，田间对马双菌胺产生抗性的致病疫霉亚群的可能性很低。
Sensitivity to the new carboxylic acid amide (CAA) fungicide mandipropamid (MPD) in Phytophthora infestans was measured for isolates collected between 1989 and 2002 in Israel prior to the commercial use of MPD (baseline sensitivity, 44 isolates), and from MPD-treated (25 isolates) and untreated fields (215 isolates) in nine European countries and Israel between 2001 and 2005. All isolates were sensitive to MPD, with EC50 values ranging between 0.02 and 2.98 mu g mL(-1). Plastic-tunnel (UK), shade-house (Israel) and field experiments (Israel) conducted during 2001-05 showed that enforced selection pressure, applied preventively or curatively, imposed by repeated sublethal (5 mu g mL(-1)) or excessive (500-1000 mu g mL(-1)) doses of MPD on mixed isolates of P. infestans produced no isolates resistant to the compound. The results of this study indicate that the probability of a buildup of resistant sub-populations of P. infestans to mandipropamid in the field is low.