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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-06-22-1297-RE
|2 doi
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|a pubmed24n1225.xml
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|a (DE-627)NLM352841699
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|a (NLM)36774572
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Wang, Xiaopeng
|e verfasserin
|4 aut
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| 245 |
1 |
0 |
|a Defining Fungicide Resistance Mechanisms in the Corynespora cassiicola Population from Mississippi Soybean
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| 264 |
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|c 2023
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 31.08.2023
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|a Date Revised 13.12.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Target spot, caused by Corynespora cassiicola, is a common lower canopy soybean disease in the southern United States. Recently, target spot has resurged in importance especially following the identification of resistance to the quinone outside inhibitor (QoI) fungicides. As a result, a survey of C. cassiicola from soybean throughout Mississippi began in 2018. A total of 819 C. cassiicola monoconidial isolates were obtained from 228 fields in 75 counties. The molecular mechanism of QoI resistance was determined, which resulted from an amino acid substitution from glycine (G) to alanine (A) at position 143 using a PCR-RFLP method and comparing nucleotide sequences of the cytochrome b gene. Five previously defined geographic regions were used to present the distribution of the G143A substitution and included the Capital, Coast, Delta, Hills, and Pines. The Capital had the greatest proportion of G143A-containing isolates (95.0%), followed by the Coast (92.9%), Delta (89.8%), Pines (78.8%), and Hills (69.4%). In all, 85.8% of the C. cassiicola isolates carried the G143A substitution. In addition, the effective fungicide concentration (EC50) of randomly selected C. cassiicola isolates to azoxystrobin was used to characterize isolates as resistant (n = 14) (based on the presence of the G143A substitution and EC50 values >52 μg/ml) or sensitive (n = 11) (based on the absence of the G143A substitution and EC50 values <46 μg/ml). The EC50 values varied among isolates (P < 0.0001), with QoI-sensitive isolates exhibiting lower EC50 values than QoI-resistant isolates. The current study revealed that a reduction in sensitivity to QoI fungicides has likely resulted based on the percentage of C. cassiicola isolates containing the G143A substitution identified in Mississippi
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|a Journal Article
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|a Glycine max
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4 |
|a QoI resistance
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4 |
|a cereals and grains
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4 |
|a chemical
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| 650 |
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4 |
|a disease management
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| 650 |
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4 |
|a field crops
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| 650 |
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4 |
|a fungi
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| 650 |
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4 |
|a fungicide resistance
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| 650 |
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4 |
|a soybean
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| 650 |
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4 |
|a target spot
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| 650 |
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|a Fungicides, Industrial
|2 NLM
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| 650 |
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7 |
|a quinone
|2 NLM
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| 650 |
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7 |
|a 3T006GV98U
|2 NLM
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| 700 |
1 |
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|a Aboughanem-Sabanadzovic, Nina
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sabanadzovic, Sead
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tomaso-Peterson, Maria
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wilkerson, Tessie H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Allen, Tom W
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Plant disease
|d 1997
|g 107(2023), 8 vom: 15. Aug., Seite 2365-2374
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|x 0191-2917
|7 nnns
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| 773 |
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|g volume:107
|g year:2023
|g number:8
|g day:15
|g month:08
|g pages:2365-2374
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| 856 |
4 |
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|u http://dx.doi.org/10.1094/PDIS-06-22-1297-RE
|3 Volltext
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