Effects of individual variation of host plants on the pattern of host selection in a phytophagous ladybird beetle species.

寄主植物个体变异对植食性瓢虫物种寄主选择模式的影响。

基本信息

批准号：
04640600
负责人：
KATAKURA Haruo
金额：
$ 1.09万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

Effects of individual variation and interspecific difference of plants on host selection by polyphagous phytophagous insects were studied using a ladybird beetle Epilachna pustulosa and its host plants thistle (Cirsium kamtschaticum) and blue cohosh (Caulophyllum robustum) in Sapporo, central Hokkaido. Through adult food choice tests and rearing of larvae using leaves from a number of individual plants, it was shown that thistle and blue cohosh constitute a continuous series of food resource for E.pustulosa and that the beetles select, irrespective of the plant species, the plants on which their larvae will perform well. However, the results obtained by laboratory experiments were contradictory to the patterns of host selction realized in the field ; the plants preferred in the laboratory were not always utilized in the field, and vice versa. Host selection by E.pustulosa is thus governed not only by the factors clarified in the laboratory but also by certain other factors whose effects are not yet clarified. Spatial distribution patterns and biomasses of host plants, habitat preference of beetles, and phenological correspondence between beetles and plants are possible candidates of such unknown factors. We also conducted preliminary host choice tests by E.pustulosa using thistles and blue cohosh collected in southern Hokkaido where E.niponica and E.yasutomii, closely related species to E.pustulosa but specialized to thistle and blue cohosh, respectively. In this case, too, E.pustulosa chose particular stocks irrespective of the plant species.

使用瓢虫甲虫Epilachna pustulosa及其宿主植物蓟（Cirsium kamtschaticum）和蓝色同骨（Caulophyllum robustum），在中部，hokkkaido中部，使用瓢虫甲虫丘疹及其宿主植物蓟（Cirsium kamtschaticum）研究了单个变异和种植植物对宿主选择宿主选择的影响。通过使用多种单个植物的叶子进行成人食物选择测试和幼虫饲养，表明蓟和蓝色的同胞构成了e.pustulosa的一系列连续的食物资源，而甲虫则选择，无论其植物物种，其幼虫上的植物都会表现良好。但是，通过实验实验获得的结果与田间实现的宿主式服务的模式相矛盾。在实验室中首选的植物并不总是在野外使用，反之亦然。因此，E.pustulosa的寄主选择不仅受实验室中阐明的因素的控制，而且还受某些尚未澄清的其他因素。寄主植物的空间分布模式和生物量，甲虫的栖息地偏好以及甲虫和植物之间的候位对应是此类未知因素的候选者。我们还使用在北海道南部收集的蓟和蓝色co虫进行了e.pustulosa的初步宿主选择测试，e.niponica和e. yasutomii，与e.pustulosa紧密相关的物种，但分别专门针对蓟和蓝色同胞。在这种情况下，E.Pustulosa也选择了特定的股票，无论植物种类如何。