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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/540| Chemical management in fungicide sensivity of Mycosphaerella fijiensis collected from banana fields in México | |
| BRISIA ALEJANDRA AGUILAR BARRAGAN OLGA ELIZABETH ODRIOZOLA CASAS GLORIA MARGARITA MACEDO RAYGOZA TETSUYA OGURA GILBERTO MANZO SANCHEZ ANDREW CHRISTOPHER JAMES KAY IGNACIO RODRIGO ISLAS FLORES MIGUEL JUAN BELTRAN GARCIA | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| DOI: 10.1590/S1517-83822014000100051 | |
| BANANA FUNGICIDES MYCOSPHAERELLA FIJIENSIS SENSITIVITY SIGATOKA | |
| Mycosphaerella fijiensis (Morelet) requires numerous applications of fungicides per year. However this has led to fungicide resistance in the field. The present study evaluated the activities of six fungicides against the mycelial growth by determination of EC50 values of strains collected from fields with different fungicide management programs: Rustic management (RM) without applications and Intensive management (IM) more than 25 fungicide application/year. Results showed a decreased sensitivity to all fungicides in isolates collected from IM. Means of EC50 values in mg L-1 for RM and IM were: 13.25 ± 18.24 and 51.58 ± 46.14 for azoxystrobin, 81.40 ± 56.50 and 1.8575 ± 2.11 for carbendazim, 1.225 ± 0.945 and 10.01 ± 8.55 for propiconazole, 220 ± 67.66 vs. 368 ± 62.76 for vinclozolin, 9.862 ± 3.24 and 54.5 ± 21.08 for fludioxonil, 49.2125 ± 34.11 and 112.25 ± 51.20 for mancozeb. A molecular analysis for β-tubulin revealed a mutation at codon 198 in these strains having an EC50 greater than 10 mg L-1 for carbendazim. Our data indicate a consistency between fungicide resistance and intensive chemical management in banana fields, however indicative values for resistance were also found in strains collected from rustic fields, suggesting that proximity among fields may be causing a fungus interchange, where rustic fields are breeding grounds for development of resistant strains. Urgent actions are required in order to avoid fungicide resistance in Mexican populations of M. fijiensis due to fungicide management practices. | |
| 2014 | |
| Artículo | |
| Brazilian Journal of Microbiology, 45(1), 359-364, 2014 | |
| Inglés | |
| Aguilar-Barragan, A., García-Torres, A. E., Odriozola-Casas, O., Macedo-Raygoza, G., Ogura, T., Manzo-Sánchez, G., ... & Beltrán-García, M. J. (2014). Chemical management in fungicide sensivity of Mycosphaerella fijiensis collected from banana fields in México. Brazilian Journal of Microbiology, 45(1), 359-364. | |
| BIOLOGÍA Y QUÍMICA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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