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Title: Plant extracts to control Alternaria alternata in Murcott tangor fruits
Other Titles: Extractos vegetales para el control de Alternaria alternata en frutos de tangor Murcott
Keywords: Alternaria brown spot
Plant disease control
Natural products
Scanning electron microscopy
Mancha marrón de Alternaria
Control de enfermedades vegetales
Productos naturales
Microscopia electrónica de barrido
Issue Date: 2011
Publisher: Asociacion Espanola de Especialistas en Micologia
Citation: CARVALHO, D. D. C. et al. Plant extracts to control Alternaria alternata in Murcott tangor fruits. Revista Iberoamericana de Micología, Barcelona, v. 28, n. 4, p. 173–178, Oct./Dec. 2011.
Abstract: Background: Alternaria alternata causes the Alternaria brown spot disease (ABS) in many tangerines and their hybrids worldwide. Plant extracts offer an alternative method for controlling this disease, which control is based on chemical fungicides. Aims: To identify plant species with antifungal properties against A. alternata, the causal agent of the ABS. Methods: Plant extracts prepared from leaves, barks, flowers, and stalks collected from 105 plant species in the State of Minas Gerais, Brazil, were tested for activity against the fungus A. alternata in vitro and in vivo. Results: The most promising extract was obtained from Anadenanthera colubrina, which reduced the disease on Murcott tangor fruits to levels obtained with commercial fungicides. Artemisia annua, Cariniana estrelensis, Ficus carica, and Ruta graveolens presented moderate in vitro antifungal activity, but no effects were observed on the disease when the extracts were applied to fruits inoculated with the fungus. Besides, A. colubrina was the most active extract against A. alternata in the in vitro assay. Conclusions: The results obtained in the in vitro and in vivo assays suggested that the fungal growth test, which uses 96-well polypropylene plates, seems to be appropriate for selecting potential plant species for testing new methods to control ABS
Appears in Collections:DCF - Artigos publicados em periódicos
LEMAF - Artigos publicados em periódicos

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