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采用系统调查的方法获得了李园和杏园桃一点斑叶蝉Erythroneura sudra与其主要天敌的种群数量,并应用灰色系统方法、生态位方法和空间格局强度指标方法分析了该虫和主要捕食性天敌之间的数量、时间和空间关系.结果表明,李园和杏园不同时间桃一点斑叶蝉数量波动大,高峰期分别为7月17日—8月29日、6月20日—8月29日,以李园数量较大.捕食性天敌发生出现2个盛期,即5月初—7月上旬和9月初—10月中旬.关联度分析结果表明,与该叶蝉数量关联度较高的天敌依次是锥腹肖蛸Tetragnatha maxillosa、中华草蛉Chrysopa sinica和草间小黑蛛Erigonidium graminicola,与理想优势种天敌数量关联度较高的天敌依次为中华草蛉、三突花蟹蛛Misumenops tricuspidatus和异色瓢虫Leis axyridis.生态位研究结果表明,与桃一点斑叶蝉的水平和垂直空间生态位重叠度最高的为三突花蟹蛛,相似性指数最高的为草间小黑蛛;草间小黑蛛与桃一点斑叶蝉之间时间生态位相似性指数和重叠指数最高.综合分析,与桃一点斑叶蝉关系密切的前3位的天敌依次是三突花蟹蛛、草间小黑蛛和锥腹肖蛸.
The population of Erythroneura sudra and its major natural enemies in Liyuan and Xingyuan peaches were systematically investigated. The population system of Erythroneura sudra and its major natural enemies was analyzed. The gray system method, niche method and spatial pattern intensity index method were used to analyze the relationship between the insect and major predatory enemies The results showed that the quantity of leafhopper at different times in Liyuan and Xingyuan increased greatly, the peak periods were from July 17 to August 29 and June 20 to August respectively On the 29th, there was a large quantity of Liyuan, and two predominant occurrences of predatory natural enemies occurred in early May-early July and early September-mid-October.The correlation analysis showed that the correlation with the leafhopper was high The natural enemies were Tetragnatha maxillosa, Chrysopa sinica and Erigonidium graminicola. The natural enemies with the highest correlation with the predominant dominant species were Misumenops tricuspidatus And Leis axyridis. The results of niche research showed that the highest similarity of the horizontal and vertical spatial niche overlap with the peach leaf spotted leafhopper Grasshopper black spider, and the temporal niche similarity index and overlap index were the highest among the grasshopper spider mites and peach leaf spotted leafhopper.According to the comprehensive analysis, the first three natural enemies closely related to the peach leafhopper were three Flower crab spider, grass black spider and conical abdomen Xiao 蛸.