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秋季油菜苗期病害主要为白锈病和霜霉病，虫害主要为蚜虫、蓝跳甲、菜青虫等。此时，油菜从发芽长根到长茎、叶的初期营养生长阶段，一般气温较高，秋雨较多，相对湿度较大。同时，因油菜个体逐渐增长，苗床上密度较大，极易滋生病虫害。因此，油菜苗期是防治病虫危害的重要时
Autumn rapeseed disease mainly white rust and downy mildew, pest mainly aphids, blue hopper, cabbage caterpillar and so on. At this point, the rape grows from the root to long stems, leaves the initial vegetative growth stage, the general high temperature, autumn more, relative humidity. At the same time, due to the individual rapeseed gradually increased seedling density, easily infested pests and diseases. Therefore, the rapeseed seedling is an important time to control pests and diseases