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甘蓝蚜[Brevicoryne brassicae (Linné)]是烏魯木齐地区十字花科蔬菜上最主要的蚜虫。从9月下旬开始,在晚甘藍、晚苤藍及大白菜等蔬菜靠近地面的根、茎凹陷处,以及叶柄基部和叶片上产卵。蚜卵既可随寄主在菜窖里越冬;也可在菜株残体上露地越冬。露地越冬蚜卵,一般不能成为早春的有效蚜源,因其孵化率极低;孵化出来的少数干母,由于不能及时得到食料或因气候不适合,难以存活。越冬蚜卵于4月下旬孵化,5月中旬末产生有翅蚜,主要先在越冬寄生及冬蘿卜留种株上繁殖;到5月下旬至6月初,才陆續迁飞到春、夏十字花科蔬菜及春油菜上,大量繁殖和为害。7月下旬至8月初,晚甘藍与晚苤藍上的蚜虫便成为大白菜和冬蘿卜苗期的主要蚜源。甘藍蚜在烏魯木齐地区,无論是在菜窖里,或是在露地残株上,均不能以成蚜越冬。
Brevicoryne brassicae (Linné) is the most important aphid on cruciferous vegetables in Urumqi. Beginning in late September, spawns are found near the ground roots and stem dents, as well as at the basal and leaf petioles of vegetables such as late cabbage, late nights and cabbage. Aphid eggs either overwinter with the host in the cellar; Winter wintering aphids eggs, generally can not be an effective source of early spring aphid, because of its very low hatching rate; hatched a few dry nuts, because they can not get food or weather is not suitable, it is difficult to survive. Wintering winter aphids eggs hatch in late April, at the end of May a winged aphid, mainly in the winter parasitic and winter radish remaining strains of reproduction; to late May to early June, before moving to the spring and summer cross Herbaceous vegetables and spring rape, large numbers of breeding and damage. From late July to early August, the aphids on the cabbage and eveninggreens became the major aphids in Chinese cabbage and winter radish seedlings. Cabbage aphids in Urumqi, both in the cellar, or in the open stubble, can not become a wintering winter.