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为合理保护和利用天敌及科学地选取抽样方法,开展合肥地区“518”油桃园山楂叶螨和李肖叶甲与其天敌之间空间关系研究,运用地学统计学方法求得天敌和害虫各自半变异函数的变程,用灰色关联度分析方法分析害虫与天敌变程的关联度,关联度值越大的天敌在空间上对害虫的跟随关系越密切。分析了山楂叶螨和李肖叶甲种群数量在全年最多时段5月23日—7月17日的油桃园中8种主要天敌对两种害虫空间跟随关系的密切程度。结果表明,与山楂叶螨空间上跟随关系密切的前3位天敌依次是异色瓢虫、草间小黑蛛和八点球腹蛛;与李肖叶甲空间上跟随关系密切的前3位天敌依次是草间小黑蛛、龟纹瓢虫和八点球腹蛛。用生态位分析法分析油桃树冠不同方位上与山楂叶螨空间上跟随关系密切的前3位天敌依次是草间小黑蛛、异色瓢虫和八点球腹蛛;与李肖叶甲空间上跟随关系密切的前3位天敌依次是草间小黑蛛、异色瓢虫和八点球腹蛛。
In order to rationally protect and utilize natural enemies and select sampling methods scientifically, the spatial relationship between hawthorn spider mite (Lepidoptera frugiperda) and its natural enemies in “518 ” peach garden in Hefei was studied. Geostatistics was used to obtain the semi-variance Function, and the correlation degree between pests and natural enemies was analyzed by the method of gray relational analysis. The higher the correlation degree, the more closely the natural enemies followed the pests. The numbers of the hawthorn spider mites and the leaves of L. chinensis were analyzed. The close relationships of the spatial distribution of the eight main natural enemies in the peach orchard on May 23 to July 17 at the annual maximum were observed. The results showed that the top three natural enemies closely related to the spider mites were the order of the Harmonia axyridis, the herbaceous black spider and the eight-point spider spider; followed by the first three natural enemies Is a black grass spider between the grasshopper ladybug and eight-point ball spider. The first three natural enemies closely related to the spider mite spider mites in different orientations of nectarine crown were analyzed by niche analysis followed by the grasshopper, The three most closely related natural enemies were black grasshopper, heterochromatic ladybug and eight-spotted spider.