三种蔷薇科果树小绿叶蝉及捕食性天敌种群动态的比较

Comparative analysis of population dynamics of Emposaca flavescens(Fab.) and its natural enemies in three Rosaceae fruit plants

对3种果树小绿叶蝉及其天敌数量进行t检验得出,樱桃园与梨园之间,小绿叶蝉、异色瓢虫、锥腹肖蛸差异显著、三突花蟹蛛差异极显著,均是樱桃园多于梨园;樱桃园与杏园之间,三突花蟹蛛、草间小黑蛛差异显著,异色瓢虫、锥腹肖蛸差异基本显著,均是樱桃园多于杏园,小绿叶蝉差异基本显著,杏园多于樱桃园;梨园与杏园之间,草间小黑蛛和小绿叶蝉均差异显著,杏园多于梨园。采用灰色系统分析方法研究樱桃小绿叶蝉数量与其天敌个体数量关联度,结果是,关联度较高的天敌依次是锥腹肖蛸、草间小黑蛛、八斑球腹蛛和中华草蛉,与理想优势种天敌数量关联度较高的天敌依次是三突花蟹蛛、异色瓢虫、草间小黑蛛和中华草蛉;利用生态位分析方法分析的结果是,与小绿叶蝉时间生态位和空间生态位重叠指数较大的天敌依次是异色瓢虫、草间小黑蛛、三突花蟹蛛和锥腹肖蛸;与小绿叶蝉两种生态位相似性比例指数较大的天敌依次是异色瓢虫、三突花蟹蛛、草间小黑蛛和锥腹肖蛸。综合排序分析,前4位的天敌依次是异色瓢虫、草间小黑蛛、三突花蟹蛛和锥腹肖蛸。

The numbers of Emposaca flavescens（Fab.）and its natural enemies in three fruit plants were compared using T-test,cherry field and pear field showed a highly significant difference in Misumenops tricuspidatus and significant difference in Emposaca flavescens（Fab.）Harmonia axyridis and Tetragnatha maxillosa,the amounts of which in cherry field were apprently higher than that in pear field,cherry field and apricot field showed a significant difference in Misumenops tricuspidatus and Erigonidium graminicola and a basal significant difference in Harmonia axyridis Tetragnatha maxillosa and Emposaca flavescens（Fab.）,the amounts of which in cherry field were apprently higher than the apricot field excep the Emposaca flavescens（Fab.）.Pear field and apricot field showed a significant difference in Erigonidium graminicola and Emposaca flavescens（Fab.）,the amounts of which in the aricot field were apprently higher than the pear field.Relevancy of Erythroneura sudra with its natural enemies was studied by using grey systematic analysis.The results showed that As for the quantity of the natural enemies,the major natural enemies of Emposaca flavescens（Fab.）was Tetragnathidae,Erigonidium graminicola,Therdionoctomaculatum and Chrysopa sinica,while for the quantity of the ideal dominant natural enemies,the natural enemies which highly associated were Misumenops tricuspidatus,Harmonia axyridis,Erigonidium graminicola and Chrysopa sinica.As for the ecological niche analysis,both the temporal and horizontal niche overlaps were Harmonia axyridis,Erigonidium graminicola,Misumenops tricuspidatus and Tetragnatha maxillosa,while Both the temporal and horizontal niche which highly associated with the Emposaca flavescens（Fab.）were Harmonia axyridis,Misumenops tricuspidatus Erigonidium？ graminicola and Tetragnathidae.It can be concluded from the Synthetical ordered analysis that the main natural enemies were Harmonia axyridis、Erigonidiumgraminicola、Misumenops tricuspidatu and Tetragnathidae.