Document Detail

Plant extracts to control Alternaria alternata in Murcott tangor fruits.
MedLine Citation:
PMID:  21635961     Owner:  NLM     Status:  MEDLINE    
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.
Daniel Diego Costa Carvalho; Eduardo Alves; Renato Barbosa Camargos; Denilson Ferreira Oliveira; José Roberto Soares Scolforo; Douglas Antônio de Carvalho; Tereza Raquel Sâmia Batista
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-05-13
Journal Detail:
Title:  Revista iberoamericana de micología     Volume:  28     ISSN:  2173-9188     ISO Abbreviation:  Rev Iberoam Micol     Publication Date:    2011 Oct-Dec
Date Detail:
Created Date:  2011-09-30     Completed Date:  2012-02-24     Revised Date:  2012-08-31    
Medline Journal Info:
Nlm Unique ID:  9425531     Medline TA:  Rev Iberoam Micol     Country:  Spain    
Other Details:
Languages:  eng     Pagination:  173-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Revista Iberoamericana de Micología. Published by Elsevier Espana. All rights reserved.
Departamento de Fitopatologia, Universidade Federal de Lavras, Minas Gerais, Brazil.
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MeSH Terms
Alternaria / drug effects*,  growth & development*,  ultrastructure
Citrus / microbiology*
Microscopy, Electron, Scanning
Plant Diseases / prevention & control*
Plant Extracts / pharmacology*,  therapeutic use*
Reg. No./Substance:
0/Plant Extracts

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