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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-06-19-1285-RE
|2 doi
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|a eng
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| 100 |
1 |
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|a Warneke, Brent
|e verfasserin
|4 aut
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| 245 |
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|a Effect of Fungicide Mobility and Application Timing on the Management of Grape Powdery Mildew
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| 264 |
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|c 2020
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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 07.04.2020
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|a Date Revised 08.04.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Grape powdery mildew (GPM) fungicide programs consist of 5 to 15 applications, depending on region or market, in an attempt to achieve the high fruit quality standards demanded by the market. Understanding how fungicides redistribute and targeting redistributing fungicide to critical crop phenological stages could improve fungicide protection of grape clusters. This study evaluated fungicide redistribution in grapevines from major fungicide groups labeled for GPM control. Translaminar and xylem redistribution was examined by placing fungicide-impregnated filter disks on the adaxial or abaxial leaf surface of detached leaves for 10 min and then incubating for 48 h before inoculating the abaxial surface with conidia. Vapor redistribution used Teflon disks sprayed with fungicides and placed on the abaxial leaf surface of detached leaves 48 h before inoculation. Disease development was rated 10 days later. Translaminar movement through calyptra was tested using flowering potted vines. All fungicides tested redistributed through at least one mechanism. Fungicide timing at critical phenological stages (early, mid, and late bloom) was assessed in small plots of cultivar Pinot noir vines. The application of trifloxystrobin, quinoxyfen, or fluopyram at different bloom stages showed that applications initiated at end of bloom resulted in the lowest berry infection probabilities of 0.073, 0.097, and 0.020, respectively. The results of this study suggest that integrating two carefully timed applications of redistributing fungicides initiated at end of bloom into a fungicide program may be an effective strategy for wine grape growers in western Oregon to produce fruit with low GPM infection
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|a Journal Article
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|a Erysiphe necator
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| 650 |
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4 |
|a Vitis vinifera
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| 650 |
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4 |
|a disease management
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| 650 |
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4 |
|a fungicide mobility
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| 650 |
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4 |
|a fungicide redistribution
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| 650 |
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4 |
|a grape
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| 650 |
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4 |
|a grape powdery mildew
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| 650 |
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|a Fungicides, Industrial
|2 NLM
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|a Thiessen, Lindsey D
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|4 aut
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| 700 |
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|a Mahaffee, Walter F
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Plant disease
|d 1997
|g 104(2020), 4 vom: 01. Apr., Seite 1167-1174
|w (DE-627)NLM098181742
|x 0191-2917
|7 nnns
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|g volume:104
|g year:2020
|g number:4
|g day:01
|g month:04
|g pages:1167-1174
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|u http://dx.doi.org/10.1094/PDIS-06-19-1285-RE
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