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一、发生规律:为害黄花菜的蚜虫主要有萝卜蚜和桃蚜,甘蓝蚜次之。萝卜蚜在北方一般以卵或无翅胎生雌蚜随采收蔬菜进入菜窑越冬,有的也可以卵在秋白菜及留种株上越冬;桃蚜一般以卵在桃、李、杏等树梢、腋芽、裂缝处及小枝叉处越冬,也有部分以卵或成、若蚜在油菜和十字花科蔬菜小叶内越冬的;甘蓝蚜以卵在甘蓝、冬萝卜和油菜上越冬。在南方,一般无越冬现象。当春季黄花菜出苗后迁入,在花蕾期最多,尤其在降雨少,气候干燥时可大发生,危害相当严重。
First, the law occurs: damage aphids lily main radish aphid and peach aphid, followed by cabbage aphid. Aphids in the north usually oviposit or wingless viviparous female aphids with vegetable harvest into the kiln overwintering, and some can also egg fall winter cabbage and leave the plant overwintering; Myzus persicae generally eggs in the peach, plum, apricot and other trees Shoots, axillary buds, cracks and branchlets at the winter, but also part of the egg or into, if the aphids in the rape and cruciferous vegetables leaflets wintering; cabbage aphids eggs in winter cabbage, carrot and rape. In the south, there is generally no overwintering phenomenon. When the spring lily immigrated after the emergence, the buds of the most, especially in the less rainfall, the climate can occur when dry, the damage is quite serious.