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DE-627 |
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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-12-18-2282-RE
|2 doi
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|a pubmed24n0997.xml
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Rosenzweig, N
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Fungicide Sensitivity Monitoring of Alternaria spp. Causing Leaf Spot of Sugarbeet (Beta vulgaris) in the Upper Great Lakes
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| 264 |
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|c 2019
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 24.09.2019
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|a Date Revised 25.09.2019
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Alternaria leaf spot (ALS), caused by Alternaria spp., can occur wherever sugarbeet is grown. Infection by Alternaria spp. and disease management has historically been considered a minor issue in sugarbeet production in the United States. An increase of both incidence and severity in 2016 of ALS high enough to cause yield loss has been observed in Michigan. With a renewed need to consider potential management of this disease, the sensitivity was determined for populations of Alternaria spp. to three classes of fungicides currently labeled for management of leaf spot on sugarbeet, including demethylase inhibitor (DMI), quinone outside inhibitor (QoI), and organo-tin fungicides. Leaves with symptoms of ALS were sampled from sugarbeet fields in east-central Michigan and southwestern Ontario, Canada. Monoconidial isolates were obtained to determine sensitivity to each fungicide class above. A spiral gradient dilution method was used to estimate the fungicide effective concentration (in milligrams per liter) that caused a 50% inhibition of fungal growth in vitro for all isolates. Significant temporal shifts were detected in the frequencies of sensitivity phenotypes to DMI and QoI but not organo-tin fungicides from 2016 through 2017. Individual isolates of Alternaria spp. were recovered with cross-resistance to DMI and multiple resistance to DMI, QoI, and triphenyltin hydroxide fungicides. To our knowledge, this is the first report of a fungus other than Cercospora beticola with resistance to organo-tin fungicides. Fungicide sensitivity monitoring indicates that an effective integrated disease management approach combining fungicide efficacy trials and monitoring pathogen biology is essential for developing effective resistance management recommendations
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|a Journal Article
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| 650 |
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|a Fungicides, Industrial
|2 NLM
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1 |
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|a Hanson, L E
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mambetova, S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jiang, Q W
|e verfasserin
|4 aut
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| 700 |
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|a Guza, C
|e verfasserin
|4 aut
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| 700 |
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|a Stewart, J
|e verfasserin
|4 aut
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| 700 |
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|a Somohano, P
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant disease
|d 1997
|g 103(2019), 9 vom: 01. Sept., Seite 2263-2270
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|x 0191-2917
|7 nnns
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|g volume:103
|g year:2019
|g number:9
|g day:01
|g month:09
|g pages:2263-2270
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|u http://dx.doi.org/10.1094/PDIS-12-18-2282-RE
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