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系统调查了圆果大赤螨与龙眼角颊木虱的田间种群动态关系,并在实验室条件下测定了圆果大赤螨对龙眼角颊木虱的捕食作用。结果表明,圆果大赤螨对龙眼角颊木虱的田间种群具有明显的动态跟随效应和控制作用;捕食作用试验结果表明,圆果大赤螨成螨对龙眼角颊木虱的卵、1龄、2龄、3龄若虫的捕食功能反应均属于HollingⅡ型,捕食量都是随着猎物密度增加而增大,圆果大赤螨对龙眼角颊木虱的瞬时攻击率(a)按1龄若虫、卵、2龄若虫、3龄若虫依次降低,处置时间(Th)依次延长。圆果大赤螨成螨对龙眼角颊木虱不同虫态的取食选择性具有显著性差异,在相同猎物密度条件下,取食量大小顺序依次为1龄若虫、卵、2龄和3龄若虫,对4龄若虫表现为不取食。
The relationship between the population dynamics of Dictyostella patens and Longhorn pipiens pallens was systematically investigated. The predation effect of Drosophila melanogaster on Psyllifera longicornis was determined under laboratory conditions. The results showed that the Dicarona mongolica had a significant dynamic follow-up effect and control effect on the field population of Larix gmelini in the longan. The predation test showed that the eggs of Dicotyledonoptera The predation functional responses of the 2nd instar, the 3rd instar nymphs belong to the Holling type II, and the predation amount increases with the increase of the prey density. The instantaneous attack rate (a) Nymphs, eggs, 2nd instar nymphs and 3rd instar nymphs were reduced in turn, and the treatment time (Th) was prolonged in turn. In the same prey density, the order of feeding amount was 1-instar nymphs, eggs, 2nd instar and 3rd instar larvae Nymphs of the 4th instar nymphs showed no feeding.