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- Title
Inhibition of the mycelial growth and germination of Stromatinia cepivora by plant extracts and essential oils.
- Authors
FUGA, Cícero Augusto Guimarães; LOPES, Everaldo Antônio; VIEIRA, Bruno Sérgio; SOARES, Márcio Santos; de Barros FERNANDES, Regina Victória
- Abstract
Stromatinia cepivora is one of the major pathogens of Allium species worldwide. Assuming that substances produced by plants may be used in the management of this pathogen, the effect of plant extracts and essential oils on the mycelial growth and germination of S. cepivora was assessed in this study. The fungus was grown on PDA medium with aqueous and ethanolic extracts (20%, m:v) of mentrasto, rue, ginger, false saffron, garlic and citronella at the concentrations of 1 or 10 mL L-1 and the essential oils of citronella, rosemary, neem and Corymbia citriodora at 100, 200, 400, 800 or 1,200 μL L-1. None of the plant extracts reduced the germination of the sclerotia. All aqueous extracts at 10,000 μL L-1 reduced the growth of the fungus from 28.0% to 53.5%. At the 1,000 μL L-1, the ethanolic extracts of ginger, citronella, rue and false saffron reduced the mycelial growth of the pathogen up to 45.1%, especially the extract of ginger. The essential oils of all the plants suppressed the mycelial growth of S. cepivora at 800 and 1,200 μL L-1, especially the citronella and rosemary oils at 1,200 μL L-1, which caused 100% of inhibition. 5% of sclerotia germinated in PDA containing the oils at 1,200 μL L-1, regardless the plants. The extracts of mentrasto, rue, ginger, false saffron and citronella and especially the essential oils of citronella, rosemary, neem and C. citriodora at 1,200 μL L-1 have substances that inhibit the growth of S. cepivora.
- Subjects
MYCELIUM; GERMINATION; ASCOMYCETES; PLANT extracts; ESSENTIAL oils; ALLIUM
- Publication
Cientifica, 2018, Vol 46, Issue 3, p257
- ISSN
0100-0039
- Publication type
Article
- DOI
10.15361/1984-5529.2018v46n3p257-263