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Management of Fusarium Head Blight and Septoria tritici Blotch in Winter Wheat through the use of Host Resistance and Chemical Controls and the Investigation of Fusarium graminearum Chemotype Diversity, Aggressiveness and Toxicity

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dc.contributor.advisor Schaafsma, Art Dr.
dc.contributor.advisor Tamburic-Ilincic, Lily Dr
dc.contributor.author Muckle, Ashley E
dc.date.accessioned 2013-05-03T19:59:00Z
dc.date.available 2013-05-03T19:59:00Z
dc.date.copyright 2013-04
dc.date.created 2013-04-25
dc.date.issued 2013-05-03
dc.identifier.uri http://hdl.handle.net/10214/6615
dc.description.abstract Fusarium head blight (FHB) caused by Fusarium graminearum and Septoria tritici blotch (STB) caused by Septoria tritici are economically important wheat diseases in Ontario. Both reduce yield, FHB is associated with mycotoxin accumulation including deoxynivalenol (DON). Different F. graminearum chemotypes produce either DON/15-acetyldeoxynvialenol (ADON) or DON/3-ADON. The majority (97.5%) of F. graminearum isolates collected from commercial fields across Ontario were 15-ADON chemotype, the remaining were 3-ADON. In inoculated field experiments 3-ADON chemotypes were more aggressive and toxic compared with 15-ADON chemotypes as measured by FHB symptoms and DON content. In inoculated field experiments with a population derived from ‘RCATL33’ and ‘RC Strategy’ soft red winter wheat parents, genetic resistance was more effective than fungicide application at controlling FHB. Field trials with the hard red winter wheat population derived from ‘Maxine’ and ‘FTHP Redeemer’ parents revealed that STB and FHB phenotypic resistance had no negative impact on grain yield in the absence of disease. en_US
dc.language.iso en en_US
dc.subject Fusarium head blight en_US
dc.subject Fusarium graminearum en_US
dc.subject Septoria tritici en_US
dc.subject Triticum aestivum en_US
dc.subject fungicide en_US
dc.title Management of Fusarium Head Blight and Septoria tritici Blotch in Winter Wheat through the use of Host Resistance and Chemical Controls and the Investigation of Fusarium graminearum Chemotype Diversity, Aggressiveness and Toxicity en_US
dc.type Thesis en_US
dc.degree.programme Plant Agriculture en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Plant Agriculture en_US
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