Main content

Impact of Crop Phenology and Infestation Timing on Damage and Pest Management of the Swede Midge, Contarinia nasturtii (Diptera: Cecidomyiidae), in Canola

Show simple item record

dc.contributor.advisor Hallett, Rebecca
dc.contributor.author Williams, Jonathon
dc.date.accessioned 2015-05-06T15:36:51Z
dc.date.available 2015-05-06T15:36:51Z
dc.date.copyright 2015-04
dc.date.created 2015-04-01
dc.date.issued 2015-05-06
dc.identifier.uri http://hdl.handle.net/10214/8820
dc.description.abstract The relationship between canola, Brassica napus L., crop phenology and susceptibility to the swede midge, Contarinia nasturtii (Kieffer) was investigated to improve insecticide application timing recommendations and management of this invasive pest. Insecticide applications were more critical at vegetative and early bud stages than during secondary bud formation in studies of insecticide application timing based on growth stage conducted in growers’ fields over two years. However, treatment timing effects on swede midge damage and yield varied depending on field site. Laboratory studies were conducted to elucidate relationships between swede midge oviposition preference and density, crop stage, and damage and yield effects. A significant negative relationship was observed between swede midge density and canola seed yield and pod number, as well as the potential for damage compensation by secondary raceme growth. These results may contribute to the development of swede midge pheromone action thresholds and understanding the compensatory ability of canola. en_US
dc.description.sponsorship Ontario Canola Growers Association, Canola Council of Canada, Eastern Canada Oilseeds Development Alliance, OMAFRA-University of Guelph Sustainable Production Program. en_US
dc.language.iso en en_US
dc.subject Environmental sciences en_US
dc.subject integrated pest management en_US
dc.subject pest management en_US
dc.subject agriculture en_US
dc.subject field crop en_US
dc.subject insecticide en_US
dc.subject invasive pest en_US
dc.subject phenology en_US
dc.subject oilseed rape en_US
dc.subject canola en_US
dc.subject swede midge en_US
dc.subject Contarinia nasturtii en_US
dc.title Impact of Crop Phenology and Infestation Timing on Damage and Pest Management of the Swede Midge, Contarinia nasturtii (Diptera: Cecidomyiidae), in Canola en_US
dc.type Thesis en_US
dc.degree.programme Environmental Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department School of Environmental Sciences en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.


Files in this item

Files Size Format View
Williams_Jonathon_201504_MSc.pdf 1.181Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record