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Management of Fusarium wilt in bunching spinach production in Ontario, Canada

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dc.contributor.advisor McDonald, Mary Ruth Collins, Brian 2016-04-11T18:33:28Z 2016-04-11T18:33:28Z 2016 2016-02-25 2016-04-11
dc.description.abstract Fusarium wilt, caused by the pathogen, Fusarium oxysporum f. sp. spinaciae, is a significant constraint to the summer production of bunching spinach in Ontario, Canada. Trials were conducted to: determine the range of spinach cultivar susceptibility, screen biological and synthetic fungicides for efficacy, and assess soil amendments and fumigants for the suppression of spinach Fusarium wilt. Most spinach cultivars have a basal level of resistance but none tested was immune. None of the 23 biological/synthetic fungicides tested was capable of effectively suppressing Fusarium wilt. Applications of synthetic fumigants (chloropicrin, dazomet, and metam sodium), as well as high rates of slow-release urea fertilizer, suppressed Fusarium wilt incidence and severity in field trials. Synthetic fumigants reduced the population of the pathogen in the soil, but only chloropicrin reduced the pathogen below detectable levels and prevented spinach vascular discolouration. These findings provide potential management strategies for spinach producing regions with warm summer temperatures. en_US
dc.language.iso en en_US
dc.subject spinach en_US
dc.subject Fusarium wilt en_US
dc.subject Fusarium oxysporum en_US
dc.subject fumigation en_US
dc.subject seed treatment en_US
dc.subject fungicide en_US
dc.subject cultivar en_US
dc.subject Fusarium oxysporum f. sp. spinaciae en_US
dc.subject chloropicrin en_US
dc.subject dazomet en_US
dc.subject metam sodium en_US
dc.subject limestone en_US
dc.subject compost en_US
dc.subject wilt en_US
dc.title Management of Fusarium wilt in bunching spinach production in Ontario, Canada en_US
dc.type Thesis en_US Plant Agriculture en_US Master of Science en_US Department of Plant Agriculture en_US
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