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Characterization of ethametsulfuron-methyl and group 2 herbicide resistance in ALS resistant wild mustard (Sinapis arvensis L.) populations in Manitoba

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dc.contributor.author Dexter, Jody Elaine en_US
dc.date.accessioned 2012-06-08T19:03:34Z
dc.date.available 2012-06-08T19:03:34Z
dc.date.issued 2004 en_US
dc.identifier (Sirsi) AQL-1868 en_US
dc.identifier.uri http://hdl.handle.net/1993/7846
dc.description.abstract Wild mustard (Sinapis arvensis L.) is a common and competitive weed of field and horticultural crops and occurs across all of the Canadian provinces. Since 1989, wild mustard has been effectively controlled in argentine canola (Brassica napus L.), polish canola (Brassica rapa L.) and commercial brown mustard (Brassica juncea L.) by ethametsulfuron-methyl. In 2000, splaying with ethametsulfuron failed to control 20 geographically separate wild mustard populations in conventional canola crops in southem Manitoba. Escaping patches of wild mustard were sampled in August of 2000 and ethametsulfuron herbicide resistance was confirmed at the whole plant level in a greenhouse trial. Subsamples of four acetolactate synthase (ALS) inhibitor resistant wild mustard populations (and a known susceptible population) were selected for indoor, whole-plant, dose response experiments to characterize the patterns and levels of cross-resistance to several ALS inhibitor herbicides and to the group 4 herbicide 2,4-D. ALS inhibitor herbicides used in these indoor dose-response experiments included ethametsulfuron, thifensulfuron, and imazethapyr. Furthermore, the insecticide malathion, which is a known inhibitor of Cytochrome P450 enzymes, was tank-mixed with ethametsulfuron in an additional dose-response experiment. In 2002, one ALS inhibitor resistant wild mustard population was evaluated in a separate field experiment to determine the efficacy of group 2 herbicides in competition with a competitive canola crop. The results of the greenhouse experiments show that that pattems of resistance to ethametsulfuron varied among biotypes with one biotype showing a very high level of resistance... en_US
dc.format.extent vii, 117 leaves : en_US
dc.language en_US
dc.rights en_US
dc.rights info:eu-repo/semantics/openAccess
dc.title Characterization of ethametsulfuron-methyl and group 2 herbicide resistance in ALS resistant wild mustard (Sinapis arvensis L.) populations in Manitoba en_US
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Plant Science en_US


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