On the basis of analyzing the data of incidence of wheat scab and groundwater level of counties in Shaanxi Guanzhong area,it is discovered that there is a notable correlation between the rate and index of ascocarp of Gibberela zeae on infield corn stubble and the groundwater level,and it is also demonstrated that the growth and development of the Fusarium graminearum and diseased head of wheat cultivars are affected by the groundwater level,so the groundwater level could work as the standard for epidemiolo...
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