Evaluation of Streptomyces Aureofaciens and Rhodotorulaglutinis Against Ochratoxin A Producing Aspergillusnigrin Grapevines

OchratoxinA (OTA) is a mycotoxin, produced by filamentous fungi, toxic to humans and animals and naturally found in a wide range of different agricultural products, includingfruits (grapevines).Members of Aspergillussection Nigri(black aspergilli) are mainly responsible for OTA accumulation in seeds. This research investigate the biological control of ochratoxin A (OTA) production by A. niger, using, that proved variable antagonistic activity against A. niger. A general inhibition effect was observed with tested Rhodotorulaglutinis strain followed by Streptomyces aureofaciens. A field experiment conducted during 2011 and 2012 vintages in a vineyard indicated that yeast spraying was found to be very efficient for reducing A. niger development. Grape berries sprayed with either with Streptomyces aureofaciens orRhodotorulaglutinis. Rhodotorulaglutinis completely inhibited OchratoxinAproducingA. niger for 40 days of storage.