【摘要】 油菜菌核病主茎上病斑长度和面积的扩展与时间间的关系极相关，同一植株上、下部病斑扩展动态无明显差异，中、高两种肥力条件对主茎同一部位病斑扩展动态无明显影响，相对较低的湿度与病斑扩展相关不显著．更多还原

【Abstract】 The research results indicate that the spot length and area of main stem with time have highly significant correlation；the expansive trend of spot in upper and lower parts of the same plant have no significant variance；the high and middle level fertility of soil to the expansive trend of spot on the same position of varied main stem have no significant effect；the lower humidity with spot expansion have no significant correlation.更多还原