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当温度约8℃时,苹果绵蚜若虫就开始迁移活动.3月中下旬苹果花开(结果)后,若虫就能迁入花蕊内,且各时期均能迁入花(果)定殖为害;无翅孤雌蚜全年有3个迁移活动高峰期,分别在3月下旬~4月下旬,6月下旬~7月上旬和11月上旬~12月下旬;苹果绵蚜在1 d的迁移高峰期在12~14时,随温度的升高,其活动速度和迁移虫量加快;有翅蚜在昭通市有2个发生期,分别为夏季(5月中旬~6月下旬)和秋季(8月下旬~10月上旬).夏季有翅孤雌蚜只能产孤雌蚜,且量少,秋季产生有翅蚜的虫量多,且可产性蚜和孤雌蚜.
When the temperature of about 8 ℃, the apple aphid nymphs began to migrate activities in mid and late March blooming (results), the nymphs can move into the stamens, and can move into the flowers (fruit) colonization damage ; Wing-free parthenogenetic aphids throughout the year 3 peak of migration activity, respectively, in late March ~ late April, late June ~ early July and early November ~ late December; apple aphid migration in 1 d The peak period of 12 ~ 14, with the temperature increases, the speed and the amount of migratory insects to speed up; winged aphid in Zhaotong City, there are two occurrences, namely summer (mid-May to late June) and autumn From late August to early October.) Summer winged parthenogenetic aphids can only produce parthenogenetic aphids, and the amount is small, the amount of winged aphid in autumn is more, and can produce sexual aphids and parthenogenetic aphids.