白斑猎蛛对假眼小绿叶蝉的捕食作用

Predatory Function of Evarcha albaria upon Empoasca vitis

假眼小绿叶蝉是茶园的重大害虫之一,白斑猎蛛是假眼小绿叶蝉的重要捕食性天敌之一。室内条件下,白斑猎蛛对假眼小绿叶蝉的捕食作用的研究结果表明,白斑猎蛛对假眼小绿叶蝉具有一定的捕食作用。白斑猎蛛雌、雄蛛对假眼小绿叶蝉成、若虫的功能反应均为Holling型反应,白斑猎蛛对假眼小绿叶蝉控制能力(a/Th)的大小比较关系为:雌蛛对若虫>雄蛛对若虫>雌蛛对成虫>雄蛛对成虫。白斑猎蛛对自身密度的干扰反应可用E=Na/(NP)和E=QP-m拟合,表明白斑猎蛛个体之间具有极显著的相互干扰作用。

Empoasca vitis is one of the serious pest insects in tea gardens,and Evarcha albaria is one of the important predatory enemies. Research results showed that under laboratory conditions, Evarcha albaria had certain predatory function upon Empoasca vitis. The functional responses of both male and female spiders to the adult and nymph of Empoasca vitis belonged to Holling's II type. The control ability (a/Th) of the predator on the prey was in the order of female spiders on nymph > male spiders on nymph > female spiders on adult > male spiders on adult. The disturbance responses of Evarcha albaria to their density might be fixed using formula E=Na/(N*P) and E=QP-m, showing that there was highly significant disturbance between the spider individuals.