Marssonina coronaria, new causal agent of leaf spots in apple trees with low chilling requirements in central Argentina .
During 2017-2018 years, a fungal disease caused signifi cant early defoliation on cvs `Caricia,`Princesa ́ and `Eva ́ apples trees in the center-east of the Province of Santa Fe. The symptomatology was consistent with that reported for Marssonina spp. With the purpose of characterizing the etiology...
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| Autores principales: | , , , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Universidad Nacional del Litoral
2020
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| Materias: | |
| Acceso en línea: | https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9452 |
| Aporte de: |
| Sumario: | During 2017-2018 years, a fungal disease caused signifi cant early defoliation on cvs `Caricia,`Princesa ́ and `Eva ́ apples trees in the center-east of the Province of Santa Fe. The symptomatology was consistent with that reported for Marssonina spp. With the purpose of characterizing the etiology of the disease, 9 isolates were obtained; being 4 characterized morphometrically and molecularly. After 60 days, the colonies reached 10 mm in diameter, with irregular margins and brown coloration. Conidia were hyaline, slightly curved, obovoid, unequally two-celled. The size was 15.23 ± 1.49 μm x 5.47 ± 0.52 μm. The isolates were identifi ed with 100% identity as Marssonina coronaria based on ITS gene phylogenetic analyses. The pathogenicity of the isolates was confi rmed. All inoculations produced symptoms and the pathogen was re-isolated, corresponding its characteristics with those initially mentioned. This study is the fi rst report of M. coronaria affecting apple leaves in Argentina and provides useful information to design management strategies. |
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