杂交油菜秦油二号萎缩不实病,发生面积大,危害重。据调查,各地发生的萎缩不实现象,可分为三种类型。一是矮化株型:病株主花序和分枝花序明显缩短,株高显著矮化;角果间距缩短,外观犹如试管刷;中、上部分枝的二、三、四次分枝丛生,茎基部叶腋处也长出 Hybrid canola Qin two shrinkage is not real disease, the occurrence of large area, endangering heavy. According to the survey, the shrinking that has taken place around the world is not real and can be divided into three types. First, the dwarf plant type: the main inflorescences and branches of diseased plants significantly shortened, plant height significantly dwarf; pitches shortened, the appearance is like a test tube brush; in the upper branches of the second, third and fourth branch clusters, stems Base leaf axils also grow