不同年份油桃园三种主要害虫与其天敌的关系

为了科学施药,合理保护和利用自然天敌进行油桃害虫的综合防治,用灰色系统分析方法、生态位分析方法和空间格局聚集强度指数分析方法,对2008年及2009年春-夏季油桃园桃蚜、小绿叶蝉和山楂叶螨与其主要捕食性天敌在数量、时间和空间格局等方面关系进行分析,两年春-夏季综合排序的结果是,桃蚜主要捕食性天敌依次是黑带食蚜蝇、异色瓢虫、三突花蟹蛛;小绿叶蝉主要捕食性天敌依次为三突花蟹蛛、锥腹肖蛸和草间小黑蛛;山楂叶螨主要捕食性天敌依次为草间小黑蛛、八斑球腹蛛和三突花蟹蛛。2008年秋季桃蚜的主要天敌依次是八斑球腹蛛、中华草蛉和锥腹肖蛸;小绿叶蝉的主要天敌依次是草间小黑蛛、锥腹肖蛸和黑带食蚜蝇;山楂叶螨的主要天敌依次为八斑球腹蛛、异色瓢虫和中华草蛉。两年春-夏季之间3种害虫及天敌数量差异均不显著。

Relationships between three main pests in peach orchards and their natural enemies in different years

To conserve and utilize natural enemies for comprehensive control of pests in peach orchards, the quantity, time and space framework of Myzus persicae, Empoasca flavescens, Tetranychus viennensis and their predatory natural enemies in the spring-summer seasons of 2008 and 2009 were studied using grey system analysis, ecological niche analysis and aggregated-intensity index analysis of spatial patterns. The synthetic ranking results indicated the orders of main natural enemies of the three pests in the spring-summer seasons were: Myzus persicae: Epistrophe balteata, Harmonia axyridis, Misumenops tricuspidatus; Empoasca flavescens: Misumenops tricuspidatus, Tetragnatha maxillosa, Erigonidium graminicola; Tetranychus viennensis: Erigonidium graminicola, Theridion octomaculatum, Misumenops tricuspidatus. The order of main natural enemies in 2008 autumn were: Myzus persicae: Theridion octomaculatum, Chrysopa Sinica, Tetragnatha maxillosa; Empoasca flavescens: Erigonidium graminicola, Tetragnatha maxillosa, Epistrophe balteata; Tetranychus viennensis: Theridion octomaculatum, Harmonia axyridis, Chrysopa Sinica. The numbers of pests and their natural enemies showed no significant difference between the two years.