Effects of Rain-shelter Cultivation on the Temporal Dynamics of Grape Downy Mildew Epidemics

文献类型： 外文期刊

第一作者： Yu, Shuyi

作者： Yu, Shuyi;Liu, Changyuan;Liang, Chunhao;Zang, Chaoqun;Liu, Li;Wang, Hui;Guan, Tianshu

作者机构：

关键词： disease epidemic;grape downy mildew;meteorological factors;rain-shelter;temporal dynamic

期刊名称：JOURNAL OF PHYTOPATHOLOGY （ 影响因子：1.789； 五年影响因子：1.574 ）

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年卷期：

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收录情况： SCI

摘要： Grape downy mildew (GDM), which is caused by Plasmopara viticola (Berk et Curt.) Burl. & de Toni, is the most destructive grapevine disease in the world. In this study, we chose three cultivars that differ in their resistance to GDM and compared the effects of rain-shelter cultivation and openfield cultivation methods on GDM epidemics (2012-2015). The temporal dynamics of GDM were examined over a 4-year period the results indicated that the disease index fit an S-shaped curve, and further analysis revealed that a logistic model best fit the disease development and derived epidemic periods. Rain-shelter cultivation significantly delayed the epidemic onset by 30 days, reduced the epidemic phase by 4 days, and decreased the final disease index by 50% as compared to open-field cultivation. The logistic and decline phases were shortened significantly by 7 and 21 days under rain-shelter conditions, respectively. Moreover, the rain-shelter cultivation technique effectively decreased the highest apparent infection rate and standard area under the disease progression curve values associated with reduced disease severity. The above results demonstrate that rain-shelter cultivation significantly affects temporal dynamics parameters of GDM. Meteorological factors had significant effects on the GDM epidemic in that the apparent infection rate was significantly positively correlated with mean temperature, relative humidity, rainfall, and leaf wetness duration before the first week of the experiment.

分类号： Q945

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