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|a 10.1094/PDIS-94-3-0329
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|a eng
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|a Suzuki, F
|e verfasserin
|4 aut
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|a Changes in Fungicide Resistance Frequency and Population Structure of Pyricularia oryzae after Discontinuance of MBI-D Fungicides
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|c 2010
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| 336 |
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|a Text
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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
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|a Citation Status PubMed-not-MEDLINE
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|a The changes in fungicide resistance frequency and population structure of the rice blast fungus Pyricularia oryzae were monitored after the discontinuance of melanin biosynthesis inhibitor targeting scytalone dehydratase (MBI-D) fungicides use in Saga Prefecture, Japan. After discontinuance in 2003, the frequency of resistant isolates decreased from 71.8% in 2002 to 25% in 2003, and became undetectable in 2007. The initial marked decrease was due to a decline of isolates possessing the predominant haplotype, although the haplotypic diversity among resistant isolates remained high from 2003 to 2005. These results revealed that resistant isolates were less fit in comparison with sensitive isolates in the absence of MBI-D fungicide pressure under field conditions. Pairwise FST values indicated that the change in population structure after MBI-D discontinuance was explainable by a rapid change in the proportions of resistant and sensitive subpopulations. Depending upon the existence of fitness cost and rapid changes in population structure, it may be possible to reintroduce MBI-D fungicides in areas where resistance has already developed, although we speculate that fitness cost related to MBI-D resistance may be small based on our present results and previous findings
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|a Journal Article
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|a Yamaguchi, J
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|4 aut
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| 700 |
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|a Koba, A
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|4 aut
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| 700 |
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|a Nakajima, T
|e verfasserin
|4 aut
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| 700 |
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|a Arai, M
|e verfasserin
|4 aut
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| 773 |
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|t Plant disease
|d 1997
|g 94(2010), 3 vom: 13. März, Seite 329-334
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|g month:03
|g pages:329-334
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|u http://dx.doi.org/10.1094/PDIS-94-3-0329
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