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

Abstract Ochrato xinA (OTA) is a mycotoxin, produced by filamentous fungi, to xic 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 accu mulation in seeds. This research investigate the biological control of ochrato xin A (OTA) production by A. niger, using, that proved variab le antagonistic activity against A. niger. A general inhibit ion 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 inhib ited Ochrato xinAproducingA. niger for 40 days of storage