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苹果绵蚜是一种重要的外来入侵性害虫,近年来危害逐年加重并不断扩展蔓延。本文调查研究了粗放园与化防园苹果绵蚜及其天敌的种群动态规律,分析了苹果树上苹果绵蚜及其天敌空间分布差异。结果表明,粗放园中苹果绵蚜及天敌数量均高于化防园。2007年粗放园与化防园中平均虫落数量为40.9个/株和4.9个/株,2008年为19.6个/株和2.1个/株。粗放园中苹果绵蚜趋向于整个树冠分布,主枝、树干相对较少;在化防园中苹果绵蚜向树的下部转移,主枝上分布较多,树冠分布较少。化防园中天敌数量低,对苹果绵蚜控制作用减弱。
Aphis gossypii is an important invasive pest in recent years, the harm is increasing year by year and continues to expand and spread. This paper investigates the population dynamics of the cotton aphid and its natural enemies in the crude and garden plants, and analyzes the spatial distribution differences of the apple aphids and their natural enemies on apple trees. The results showed that the number of apple aphids and their natural enemies in the extensive garden was higher than that of the chemical garden. In 2007, the average number of pests in the crude and garden was 40.9 / plant and 4.9 / plant in 2008, 19.6 plants / plant and 2.1 plant / plant in 2008. In the extensive garden, the apple aphid tends to distribute throughout the canopy, with fewer main and trunk branches. In the garden, the apple aphid is transferred to the lower part of the tree, with more branches and fewer crown branches. The number of natural enemies in the garden is low, and the control effect on apple aphid is weakened.