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在实验室条件下,研究了细缘唇瓢虫成虫对桑白盾蚧雌成虫、卵和初孵若虫捕食的功能反应、寻找效应、干扰作用。结果表明,细缘唇瓢虫成虫捕食量与桑白盾蚧雌成虫、卵及初孵若虫密度呈负加速曲线关系,功能反应属HollingⅡ型。每头细缘唇瓢虫成虫对桑白盾蚧雌成虫、卵及初孵若虫日均最大捕食理论值分别为11.07头、140.91粒、65.00头。寻找效应与自身密度的关系可用HasseⅡ数学模型描述。由模型得出,1头细缘唇瓢虫成虫对桑白盾蚧雌成虫、卵和初孵若虫的最佳寻找密度分别为14.56头、61.5粒、28.22头。表明细缘唇瓢虫成虫对桑白盾蚧捕食潜力很大,其寻找效应均随着猎物密度的增加而降低,捕食率随着自身密度的增加而降低。
Under laboratory conditions, the functional responses of adult female L. lipi adults to predation by female adults, eggs and newly hatched nymphs were studied in order to find the effect and interference. The results showed that the predation amount of adult ladybug larvae was negatively accelerated with the density of female adults, eggs and newly hatched nymphs. The functional reaction was Holling Ⅱ. The maximum daily predation value of adults, eggs and newly hatched nymphs per adult of Sesbania lipworm adults was 11.07, 140.91 and 65.00, respectively. The relationship between the search effect and its own density can be described by the Hasse II mathematical model. According to the model, the best finding density of adults, eggs and newly hatched nymphs of adult Sphingodiscus lactiflora was 14.56, 61.5 and 28.22 respectively. It showed that the predatory potential of adult ladybug lip ladybugs had a great potential for hunting mulberry white shellacids. The search effect decreased with the increase of prey densities, and the predation rate decreased with the increase of its own density.