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231225s2000 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS.2000.84.12.1345B
|2 doi
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|a eng
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| 100 |
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|a Rivera, M C
|e verfasserin
|4 aut
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|a First Report of Colletotrichum gloeosporioides on Chinese Rose in Argentina
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|c 2000
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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 Chinese rose (Hibiscus rosa-sinensis L.) is a shrub frequently planted in Argentina. In November 1999, dieback and anthracnose symptoms were detected on stems and leaves of plants cv. Hawaii cultivated in Buenos Aires. Disease prevalence was 50%. Pieces of infected tissues were surface-sterilized for 1 min in 2% NaOCl, plated on potato-dextrose agar and incubated at 24 ± 2°C. The isolate that was consistently recovered from diseased tissues was identified as Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., based on morphological characteristics (1,2). Teleomorph stage was not observed. Inoculation for pathogenicity testing was carried out by spraying a conidial suspension (6.5 × 106 conidia per ml) on plants with previously punctured leaves and pruned stems. Inoculated plants with unwounded tissues, as well as noninoculated controls, were included. Five replications of each treatment were done. Plants were incubated in moist chambers at 24°C. Whitish areas of 0.3 to 0.5 cm diameter surrounded by a purple halo developed on all punctured leaves within 10 days. Stem blight and leaf drop were observed. The center of the lesions was covered by black acervuli 14 days after inoculation. Unwounded and noninoculated controls remained symptomless. The pathogen was reisolated from inoculated leaves, completing Koch's postulates. This is the first report of C. gloeosporioides causing disease on Chinese rose in Argentina. References: (1) J. A. Bailey and M. J. Jeger, eds. 1992. Colletotrichum. CAB International, Surrey, England. (2) B. C. Sutton. 1980. The Coelomycetes. CMI, Kew
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|a Journal Article
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| 700 |
1 |
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|a Wright, E R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Carballo, S
|e verfasserin
|4 aut
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|i Enthalten in
|t Plant disease
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|g 84(2000), 12 vom: 31. Dez., Seite 1345
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|g volume:84
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|g number:12
|g day:31
|g month:12
|g pages:1345
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|u http://dx.doi.org/10.1094/PDIS.2000.84.12.1345B
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