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Evaluation of Fungicides for Management of Blackleg Disease on Canola and QoI-fungicide Resistance in Leptosphaeria maculans in Western Canada

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dc.contributor.supervisor Fernando, Dilantha (Plant Science) en_US
dc.contributor.author Liu, Chang
dc.date.accessioned 2014-08-22T18:11:26Z
dc.date.available 2014-08-22T18:11:26Z
dc.date.issued 2014-08-22
dc.identifier.uri http://hdl.handle.net/1993/23857
dc.description.abstract Blackleg, caused by the fungus Leptosphaeria maculans, is one of the most important diseases on canola in western Canada. Severe epidemics can cause substantial losses of seed yields and quality. Fungicide application is an important disease management strategy, but little is known about the efficacy of fungicides against blackleg and possible impact on fungicide sensitivity of L. maculans after repeated uses. The results of present study showed that fungicides generally reduced the blackleg incidence and severity on the susceptible canola cultivar, and the QoI fungicides were more effective than the DMI fungicides. Early fungicide application at about 2-4 leaf stage provided a small yield improvement on the susceptible cultivar. Typical point mutation was not found in any of these QoI-insensitive L. maculans field isolates and polymorphism correlating with the QoI-insensitive phenotype was not observed either in the sequence of cytochrome b gene among the L. maculans isolates. en_US
dc.subject fungicide en_US
dc.subject blackleg en_US
dc.title Evaluation of Fungicides for Management of Blackleg Disease on Canola and QoI-fungicide Resistance in Leptosphaeria maculans in Western Canada en_US
dc.degree.discipline Plant Science en_US
dc.contributor.examiningcommittee Gan, Yantai (Plant Science) Tenuta, Mario (Soil Science) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2014 en_US


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