ABSTRACT A comparative evaluation of feeding preference of the phytoseiid predator, Neoseiulus longispinosus (Evans) was made on the different life stages of spider mite Oligonychus biharensis (Hirst) under laboratory conditions by raising stock cultures of pest mite on leaves of its native host, Bauhinia purpurea. N.longispinosus collected from field was reared on mixed prey stages of O. biharensis. Feeding experiment was conducted following leaf disc method and known numbers of various prey life stages egg, larva, nymphs, and females (pre-oviposition period) were offered simultaneously to the nymph and adult female of N.longispinosus. Number of prey stages consumed by the predator after 24 hours and consumption percentage were recorded. Feeding preference of adult predator towards prey stages decreased as follows: nymph (14.1%)> larva (13.3%)> egg (10.4%) > adult (2.2%). Predator nymph exhibited a similar order of preference with respective consumption rates of 13.3%, 13.3%, 7.5%, and 0% on the egg, larva, nymph, and adult female, respectively. Statistical analysis following ANOVA revealed a significant variation (p < 0.05) in feeding preference of the predator life stages towards varied life stages of the prey mite. Thus, results of the study clearly revealed the bio-control potential of N.longispinosus against the pest mite O. biharensis.

中文翻译：

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植甲纲捕食者 Neoseiulus longispinosus (Evans) 对叶螨 Oligonychu sbiharensis (Hirst) 不同生命阶段摄食偏好的观察

摘要 在实验室条件下，通过在原生寄主 Bauhinia 的叶子上饲养害虫螨的原种，对 phytoseiid 捕食者 Neoseiulus longispinosus (Evans) 的取食偏好进行了比较评估。紫癜。从田间采集的长棘猪笼草是在 O. biharensis 的混合捕食阶段饲养的。取食实验采用叶盘法，将已知数量的不同猎物生命阶段的卵、幼虫、若虫和雌性（产卵前时期）同时提供给长棘猪笼草的若虫和成年雌性。记录捕食者在 24 小时后消耗的猎物阶段数和消耗百分比。成年捕食者对猎物阶段的摄食偏好降低如下：若虫 (14.1%)> 幼虫 (13. 3%)> 鸡蛋 (10.4%) > 成虫 (2.2%)。捕食者若虫表现出相似的偏好顺序，分别对卵、幼虫、若虫和成年雌性的消耗率分别为 13.3%、13.3%、7.5% 和 0%。方差分析后的统计分析显示，捕食者生命阶段对捕食螨不同生命阶段的摄食偏好存在显着差异（p < 0.05）。因此，研究结果清楚地揭示了 N.longispinosus 对害虫 O. biharensis 的生物防治潜力。05）在捕食者生命阶段对捕食螨的不同生命阶段的喂养偏好。因此，研究结果清楚地揭示了 N.longispinosus 对害虫 O. biharensis 的生物防治潜力。05）在捕食者生命阶段对捕食螨的不同生命阶段的喂养偏好。因此，研究结果清楚地揭示了 N.longispinosus 对害虫 O. biharensis 的生物防治潜力。