文献类型： 外文期刊

作者： Li, Jin-Li ¹ ; Wu, Feng-Ci ² ; Zhu, Fu-Xing ¹ ;

作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Peoples R China

2.Jilin Acad Agr Sci, Agrobiotechnol Inst, Changchun 130033, Peoples R China

关键词： cold storage;dimethachlon resistance;fitness penalty;Sclerotinia sclerotiorum

期刊名称：PLANT PATHOLOGY JOURNAL （ 影响因子：1.795； 五年影响因子：2.314 ）

ISSN： 1598-2254

年卷期： 2015 年 31 卷 3 期

页码：

收录情况： SCI

摘要： After four years of cold storage, dimethachlon resistance of two laboratory-induced resistant Sclerotinia sclerotiorum isolates SCG7 and LA50 declined by 99.5% and 98.9%, respectively, and cross resistance to iprodione and procymidone also declined dramatically. Along with the decline of fungicide resistance, osmotic sensitivity to sodium chloride and glucose decreased tremendously; mycelial growth rate, sclerotia number and weight per potato dextrose agar (PDA) plate increased on average by 118.6%, 85.5% and 64.5%, respectively; and virulence to detached leaves of oilseed rape increased by 72.7% on average. Significant negative correlations were detected between dimethachlon resistance levels and mycelia' growth rate on PDA (r = 0.980, P = 0.021), and between resistance levels and lesion diameters on detached leaves of oilseed rape plants (r = 0.997, P = 0.002). These results have profound implications for assessing the potential risk for resistance development to dicarboximide fungicides in S. sclerotiorum.