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231225s2015 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-12-14-1253-RE
|2 doi
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|a pubmed24n0977.xml
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|a (NLM)30699510
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|a DE-627
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|a eng
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| 100 |
1 |
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|a Frederick, Zachary A
|e verfasserin
|4 aut
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| 245 |
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|a The Effect of Delayed-Dormant Chemical Treatments on Demethylation Inhibitor (DMI) Sensitivity in a DMI-resistant Population of Venturia inaequalis
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|c 2015
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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 Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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| 520 |
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|a Demethylation inhibitor (DMI) fungicides are an effective means to manage apple scab caused by Venturia inaequalis. Unfortunately, practical resistance to DMI fungicide chemistries is prevalent in populations in New York and the New England states. Management practices that delay the development of DMI resistance in V. inaequalis populations are highly desired by regional apple producers. Trials were conducted in a New York apple orchard during the 2011 and 2012 growing seasons to determine the impact of delayed-dormant (after bud break, but prior to green tissue) chemical treatments on the DMI sensitivity of a V. inaequalis population with stable resistance to DMI fungicides. Delayed-dormant treatment programs consisted of either an application of a copper fungicide, a manganese sanitation product, a DMI fungicide (myclobutanil), or no fungicide. Sensitivity to the DMI fungicide myclobutanil was evaluated for a minimum of 25 V. inaequalis single lesion conidial isolates from each of four replicated treatment blocks. In both years, mean percent relative growth on myclobutanil amended media for V. inaequalis isolates from the copper treatment program were significantly (P < 0.05) lower than isolates from blocks did not receive a delayed dormant fungicide treatment. The effect of the manganese treatment was inconsistent between years. V. inaequalis isolates collected from the myclobutanil treatment program were not significantly (P > 0.05) different in myclobutanil sensitivity from isolates collected from the blocks that did not receive a delayed dormant fungicide treatment. Overall, the results suggest that delayed dormant treatments of copper may favorably impact the myclobutanil sensitivity for a population of V. inaequalis with resistance to DMI fungicides, and should be considered as a standard management practice in apple production
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|a Journal Article
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1 |
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|a Villani, Sara M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cox, Kerik D
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant disease
|d 1997
|g 99(2015), 12 vom: 31. Dez., Seite 1751-1756
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|x 0191-2917
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|g volume:99
|g year:2015
|g number:12
|g day:31
|g month:12
|g pages:1751-1756
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| 856 |
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|u http://dx.doi.org/10.1094/PDIS-12-14-1253-RE
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