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1.苹果绵蚜在青岛地区1年中最高繁殖代数为17代,平均8—9代。 2.绵蚜1年中繁殖率从6月中旬至7月中旬(22—25℃)为最高,当平均气温连续多日高达26℃以上时其繁殖率显著下降。生长季节一般低温对绵蚜总繁殖率影响不大。 3.夏季有翅蚜发生时期为5月下旬至6月下旬,为数较少,出现时期也很零散,可胎生无翅胎生绵蚜与雌雄性蚜。秋季有翅蚜自8月底开始发生,盛期在9月中旬至10月中旬,10月中旬以后即极少发生,其后代为雌雄性蚜。 4.有翅蚜无口吻,约于7—9日内脱皮4次即行交尾,雌蚜仅产卵1粒,未经交配者不产卵。性蚜自然死亡率很高(平均81.2％),在田间尚未发现有越冬卵。 5.棉蚜主要越冬场所均在其原寄生部位,如伤口、裂缝内与根部不定芽上。越冬虫态以Ⅰ、Ⅱ龄绵蚜为主。 6.绵蚜之迁移以Ⅰ龄若虫为主,5月下旬至7月中旬为主要迁移为害时期。 7.绵蚜可在苹果的萼洼内寄生为害。 8.除西洋苹果、山荆子、花红与海棠外,尚未发现绵蚜有其他寄主。 9.20倍松脂合剂加0.02％γ可湿性666或5％—6％蒽油乳剂,为防治越冬绵蚜的有效药剂。生长季节可用666乳剂或可湿性666防治。 10.666酸霉味对果实品质能引起不良影响,经初步试验其施用时期最晚不应迟于采收前1个半月至2个月。
1. Apple aphid in Qingdao in 1 year the highest breeding algebra to 17 generations, an average of 8-9 generations. The reproductive rate of cotton aphid in one year was the highest from mid-June to mid-July (22-25 ℃). When the average temperature was higher than 26 ℃ for many days, its reproduction rate decreased significantly. The general low temperature during the growing season has little effect on the total reproduction rate of cotton aphids. 3. Aphid occurs in summer period from late May to late June, a small number, there is also very fragmented, can be uncrowded viviparous green sheep aphid and male and female aphids. A winged aphid in the fall since the end of August, the peak in mid-September to mid-October, rarely occurs after mid-October, the offspring of male and female aphids. 4. Apiatus apiatus without mucosa, about 7-9 days in the peel 4 times that the line is crossed, the female aphid only a spawning, without mating no spawning. The natural mortality of sexual aphids is very high (81.2% on average) and no wintering eggs have been found in the field. 5. Aphis major winter sites are in their original parasitic sites, such as wounds, cracks and adventitious buds on the roots. Overwintering insect state to Ⅰ, Ⅱ age-based cotton aphids. 6. The cotton aphid migration to the first instar nymphs, late May to mid July as the main migration damage period. 7. Cotton aphid parasitism in apple callus damage. 8. In addition to Western apple, Shan Jing Zi, bonuses and begonias, but no other host has been found. 9.20 times rosin mixture plus 0.02% gamma-wettable 666 or 5% -6% anthracene oil emulsion, for the control of overwintering cotton aphids effective agents. Growing season can be 666 emulsion or wettability 666 control. 10.666 Sour must have adverse effects on the quality of the fruit. After the initial test, the application period should not be later than 1.5 months to 2 months before harvest.