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Article

Fungicidal Activity of Plant Saponin CAY-1 for Fungi Isolated from Diseased Vitis Fruit and Stems

Anthony J. De Lucca, Maren Klich, Stephen Boue, Thomas E. Cleveland, Tien Sien, Thomas J. Walsh
Am J Enol Vitic. March 2008 59: 67-72; published ahead of print February 29, 2008 ; DOI: 10.5344/ajev.2008.59.1.67
Anthony J. De Lucca
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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  • For correspondence: adelucca@srrc.ars.usda.gov
Maren Klich
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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Stephen Boue
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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Thomas E. Cleveland
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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Tien Sien
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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Thomas J. Walsh
1Southern Regional Research Center, USDA, ARS, 1100 Robert E. Lee Blvd., New Orleans, LA 70124; 2National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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Abstract

Members of 10 fungal genera were isolated from diseased grape berries and stems collected in a local vineyard. These fungi were identified as Alternaria sp., Aspergillus japonicus, Cladosporium cladosporioides, Colletotrichum sp., Curvularia brachyspora, Epicoccum purpurascens, Greeneria uvicola, Nigrospora sphaerica, Trichoderma sp., Penicillium sclerotiorum and P. thomii. CAY-1, a fungicidal saponin in cayenne pepper (Capsicum frutescens) was significantly (p ≤ 0.05) lethal to the germinating (incubated 8 hr) but not the nongerminated (0 hr incubation) conidia of all the fungi except Alternaria and E. purpurascens at concentrations greater than 7.5 μM. CAY-1 was ineffective against the conidia of all the isolated fungi incubated 24 hr prior to mixing with the saponin. Results show that, in vitro, CAY-1 is lethal to these fungi only during their early germination cycle.

  • CAY-1
  • saponin
  • grapes
  • fungi
  • fungicidal
  • Aspergillus
  • Penicillium
  • Received June 2007.
  • Revision received October 2007.
  • Copyright © 2008 by the American Society for Enology and Viticulture
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Fungicidal Activity of Plant Saponin CAY-1 for Fungi Isolated from Diseased Vitis Fruit and Stems
Anthony J. De Lucca, Maren Klich, Stephen Boue, Thomas E. Cleveland, Tien Sien, Thomas J. Walsh
Am J Enol Vitic.  March 2008  59: 67-72;  published ahead of print February 29, 2008 ; DOI: 10.5344/ajev.2008.59.1.67

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Fungicidal Activity of Plant Saponin CAY-1 for Fungi Isolated from Diseased Vitis Fruit and Stems
Anthony J. De Lucca, Maren Klich, Stephen Boue, Thomas E. Cleveland, Tien Sien, Thomas J. Walsh
Am J Enol Vitic.  March 2008  59: 67-72;  published ahead of print February 29, 2008 ; DOI: 10.5344/ajev.2008.59.1.67
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