【摘要】 作者研究了东方钝绥螨对桔全爪螨和柏小爪螨的捕食作用。结果表明,东方钝绥螨对两种害螨的功能反应都为Holling Ⅱ型;其自身密度对捕食率具有干扰作用,密度增高,捕食率下降;同时,对害螨螨态的取食具有选择性,其幼、若和成螨都最喜食害螨的幼若螨。更多还原

【Abstract】 The capture functions of Amblyseius orientalis Ehara to Panonychus citri (McGregor) and Oligonychus perditus Pritchard et Baker were studied in the laboratory. The results showed the functional responses of this phytoseiid mite to these two spider mites were all described by Helling’s Ⅱ equation The predator’s density could affct its preying ratio, and the preying ratio decre ased with the predator’s density increasing. The predator had selectivity in preying on the stages of spider mites, but its larvaes, nymphs and adults all preferred to prey on the larvaes and nymphs of these two spider (?)tes.更多还原