Host Utilization of Field-Caged Native and Introduced Thistle Species by Rhinocyllus conicus
نویسندگان
چکیده
منابع مشابه
Population Growth of Rhinocyllus conicus (Coleoptera: Curculionidae) on Two Species of Native Thistles in Prairie
The insect Rhinocyllus conicus Froehlich is a flowerhead weevil deliberately introduced into the United States for the biological control of invasive exotic thistles in the genus Carduus. This study documents the course and magnitude of the weevil population expansion onto nontarget host plants. No weevils were reared from either Platte thistle, Cirsium canescens Nuttall, or wavyleaf thistle, C...
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Biological control is proposed as an ecological strategy to manage the threat of invasive plants, especially in natural areas. To pursue this strategy, we need to know that the host specificity criteria used to evaluate ecological risk with deliberate introduction of an exotic insect for biocontrol are sufficient to predict potential impact on native species. Host specificity is defined by adul...
متن کاملVariation in herbivore-mediated indirect effects of an invasive plant on a native plant.
Theory predicts that damage by a shared herbivore to a secondary host plant species may either be higher or lower in the vicinity of a preferred host plant species. To evaluate the importance of ecological factors, such as host plant proximity and density, in determining the direction and strength of such herbivore-mediated indirect effects, we quantified oviposition by the exotic weevil Rhinoc...
متن کاملDemographic and Evolutionary Impacts of Native and Invasive Insect Herbivores on Cirsium canescens
Invasive species have the potential to alter trade-offs leading to selection in the populations they invade. Here we quantify the demographic and selective effects of herbivory by native insects and the introduced floral feeder Rhinocyllus conicus on Platte thistle (Cirsium canescens), a sparse monocarpic thistle endemic to North America. Rhinocyllus first invaded the Platte thistle population ...
متن کاملInvasive insect abundance varies across the biogeographic distribution of a native host plant.
Studies of biogeographic variation in species abundances are fundamental to understanding and predicting the impacts of invasive exotic species. We quantified the abundance of the introduced and now invasive biocontrol weevil, Rhinocyllus conicus, on a newly adopted native host plant, Cirsium canescens (Platte thistle), across the plant's distributional range. We used regression and structural ...
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ژورنال
عنوان ژورنال: Environmental Entomology
سال: 2010
ISSN: 0046-225X,0046-225X
DOI: 10.1603/en10053