【摘 要】
：
一、发生规律 苹果绵蚜多以1、2龄若虫在树皮裂缝、剪锯口、腑烂病疤口及根蘗等处越冬,4月初果树萌芽时活动,并分泌绵状蜡质物,5月初以1龄若虫迁移,全年迁移多次,年发生17～18
【机 构】
：
龙口市果树站,龙口市果树站 265701,265701
论文部分内容阅读
一、发生规律 苹果绵蚜多以1、2龄若虫在树皮裂缝、剪锯口、腑烂病疤口及根蘗等处越冬,4月初果树萌芽时活动,并分泌绵状蜡质物,5月初以1龄若虫迁移,全年迁移多次,年发生17～18代,扩散危害。管理粗放,修剪不当有利于发生。 二、防治方法 1.治早:苹果绵蚜的防治必须抓住关键期早防治,将苹果绵蚜消灭在越冬场所内。4
First, the occurrence of law Apple aphids mostly to 1,2-year-old nymphs in the bark cracks, cut saw kerchief, ulceration and root tiller and other organs overwinter, early April activity when the fruit buds, and the secretion of cotton-like waxy material, In early May, the first-instar nymphs migrated and migrated many times throughout the year, with 17 to 18 generations occurring each year, spreading the harm. Extensive management, improper pruning is conducive to happen. Second, the prevention and treatment methods 1 rule early: prevention and control of cotton aphids must seize the key period of early prevention and control, the apple aphid eliminate in the winter venue. 4
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