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Modelling swede midge (Contarinia nasturtii Kieffer) population dynamics in its invasive range

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Title: Modelling swede midge (Contarinia nasturtii Kieffer) population dynamics in its invasive range
Author: Liu, Jenny
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Hallett, Rebecca
Abstract: Effective pest management of the invasive swede midge (Contarinia nasturtii Kieffer) is hindered by the lack of development and mortality information in its invasive range. This thesis had 2 main objectives: 1) generate temperature-dependent development and mortality data for Ontario populations of C. nasturtii; and, 2) revise an existing C. nasturtii life cycle model (MidgEmerge) with this information. Temperature-dependent development and mortality rates were determined for all C. nasturtii life stages. This information, and robust adult count field data, were used to re-parameterize MidgEmerge and develop MidgEmergeII. Egg and larval development times were found to differ between Ontario and UK populations. The re-developed MidgEmergeII model accurately predicted C. nasturtii population dynamics in various southern Ontario locations. Results indicate that there are 3 C. nasturtii emergence phenotypes and 2-3 generations in Ontario, in contrast to the previous model. These findings have implications for C. nasturtii management in its invasive range.
Date: 2019-04
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International