A ‘Goldilocks’ hypothesis for dispersal of biological control agents

摘要: The rate at which biological control agents disperse from release sites has important implications for their establishment and spread. Low rates of dispersal can yield spread that is too slow may necessitate redistribution efforts importation a high density augmentation. also lead to inbreeding the site release. On other hand, Allee effects leading edge invasion front, potentially reducing likelihood establishment. Given these disadvantages associated with both low rates, we argue intermediate are likely maximize probability appropriate released in context either or augmentative control. We consider this putative relationship ‘Goldilocks hypothesis’ since it posits an optimum values. In review paper begin by discussing rationale Goldilocks hypothesis then provide case study our work on soybean aphid, Aphis glycines. Work aphid parasitoid Binodoxys communis shown long-distance immature parasitoids within winged migrating aphids unlikely. This good news because dispersed manner would encounter crippling effects. results field suggest female B. females (but not males) actively sites. female-biased strong mate-finding therefore make less likely.