Growth and development of a generalist insect herbivore, Operophtera brumata, on original and alternative host plants
Growth and development of a generalist insect herbivore, Operophtera brumata, on original and alternative host plants
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多食性昆虫草食动物 Operophtera brumata 在原始和替代寄主植物上的生长和发育
DOI：
10.1007/s004420050976
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发表时间：
2000
期刊：
影响因子：
2.7
通讯作者：
Johanna Keranen
中科院分区：
文献类型：
--
作者：
Olli;Pekka Niemelä;Johanna Keranen
多面喂养策略在爆发性昆虫食草动物中很常见，但多面策略的最终原因尚不清楚。尽管通才昆虫食草动物能够在多种寄主植物上完成其生命周期，但在不同寄主上生长的个体的表现存在很大差异。我们研究了不同的Operophtera brumata种群是否适应使用当地最丰富的寄主物种，以及寄主植物如何影响昆虫的生长和发育。我们在四种寄主植物（Pr. padus、欧洲山杨、Q. robur、Salix phylicifolia）上饲养了两个异域种群（芬兰东部的李子；芬兰西南部的夏栎），从新生幼虫到成虫阶段，并测量了个体的生长和发育以及成虫孵化的时间。两个群体的表现在 Pr 上都是最好的。稠李，以及西南种群，最初位于Q。 robur，非常适应这个主人。宿主对雌性生长的影响大于雄性。寄主植物对成虫的孵化时间有意想不到的影响。在原始宿主上生长的个体以正常同步孵化，即雄性比雌性早 6-7 天；但在替代主机上，这种同步受到干扰。正如在爆发性、资本繁殖的多面性蛾中常见的那样，雌性的繁殖力与体重有关，寄主质量对于不会飞的雌性 O 来说至关重要。布鲁马塔。我们认为，与同质环境中的潜在最大值相比，在异质环境中，替代寄主植物对成虫羽化的干扰作用可能会降低种群密度和生长速率。
A generalist feeding strategy is common among eruptive insect herbivores but the ultimate reasons for a generalist strategy are not clear. Although generalist insect herbivores are able to complete their life cycle on several species of host plants, there is wide variation in the performance of individuals grown on different hosts. We examined whether different populations ofOperophtera brumataare adapted to use the host species which is locally most abundant, and how the host plant affects growth and development of the insect. We reared two allopatric populations (eastern Finland,Prunus padus; south-west Finland,Quercus robur) on four species of host plants (Pr. padus, Populus tremula, Q. robur, Salix phylicifolia) from neonate larvae to the adult stage and measured the growth and development of individuals and the timing of adult hatching. The performance of both populations was best onPr. padus, and the south-western population, originally onQ. robur, was well adapted to this host. The host affected the growth of females more than that of males. The host plant had an unexpected effect on hatching times of the adults. Individuals grown on the original host hatched in normal synchrony, i.e. males 6–7 days before females; but on alternative hosts this synchrony was disturbed. As is common in eruptive, capital-breeding generalist moths where female fecundity is linked to weight, host quality is critical for the flightless females ofO. brumata. We suggest that in a heterogeneous environment the disturbing effect of alternative host plants on adult emergence may decrease the population density and growth rate compared to the potential maximum in a homogeneous environment.