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巴氏新小绥螨(Neoseiulus barkeri)和黄瓜新小绥螨(N.cucumeris)是两种多食性植绥螨,主要捕食叶螨和蓟马等,目前在我国广泛应用于农业生物防治中。本文研究了这两种植绥螨种内的同类相残(cannibalism)和种间的集团内捕食作用(intraguild predation)以及相互之间的攻击强度,以明确两者之间的相互关系,为合理构建天敌组合及评估生物防治的作用提供依据。结果显示:两种植绥螨对同种或异种幼螨的捕食量最大,其次是若螨,而对卵的捕食量极低。两种植绥螨对异种幼螨或若螨的捕食量均极显著高于对同种幼螨或若螨的捕食量。可见,无其他猎物存在情况下,两种植绥螨同时发生时更倾向于发生种间的集团内捕食。而巴氏新小绥螨对异种幼螨或若螨的捕食量均高于黄瓜新小绥螨对异种幼螨或若螨的捕食量,并且巴氏新小绥螨和黄瓜新小绥螨相比,巴氏新小绥螨对异种幼螨的攻击性更强,因此当这两种植绥螨发生集团内捕食时,巴氏新小绥螨是潜在的集团内捕食者,而黄瓜新小绥螨是潜在的集团内猎物。
Neoseiulus barkeri and Cucumeris cucumeris are two kinds of polyphytic phytoseiid mites. They are predominantly spider mites and thrips, and are currently widely used in agricultural biological control in China. In this paper, the cannibalism and intraguild predation in the two phytoseiosis species and the attack strength between them were studied in order to clarify the relationship between the two and to establish a reasonable structure Natural enemies and assess the role of biological control provide the basis. The results showed that the two species of phytoseiidae preyed on the same or different species of larvae most predatory, followed by nymphs, while the prey on eggs was very low. Both species of phytoseiidae predated the infestation of different species of mites or nymphs significantly more than those of the same species of mites or nymphs. It can be seen that, in the absence of other prey species, both phytoseiosis mites are more prone to inter-species intra-group predation when they occur at the same time. While the amount of prey on the different larval mites or nymphs of M. cunea were higher than those of the new cucumbers on different species of larvae or nymphs, As compared to P. xylosus, which is more aggressive against xenotimes, so when these two phytoseiid predators prey on intra-group predators, B. succinosa is a potential intra-group predator and cucumber xinxu Mites are potential intra-group prey.