梨二叉蚜-天敌关系灰色关联度分析

Grey Relational Degree Analysis of Relationships between Natural Enemies and Schizaphis piricola

利用灰色关联度研究了各种天敌与梨二叉蚜种群数量之间的关联程度。结果显示,各种天敌与梨二叉蚜种群数量的关联度大小顺序为:卵形异绒螨>食蚜蝇>肖蛸蛛>三突花蛛>异色瓢虫=大草蛉>狼蛛>龟纹瓢虫>草间小黑蛛>蚜茧蜂>七星瓢虫。

Based on the grey system theory, the relationships between natural enemies and the population of Schizaphis piricola were studied. The results showed that various enemies could arranged as follows in the order of grey relational degree between the enemy and S. piricola ： Allothrombium ovatum 〉 Syrphidae 〉 Tetragnathidae 〉 Misumenops tricuspidatus 〉 Harmonia axyridis = Chrysopa septempunctata 〉 Lycosidae 〉 Propylaca japonica 〉 Erigonidium graminicola 〉 Aphidius 〉 Coccinella septempunctata.