Inhibitory activity of yeasts against soybean pathogenic fungi. In: Agrotrópica v. 32 n. 1 p. 75-80, 2020.

Abstract

The objective of this study was to evaluate the inhibitory activity of yeasts (Saccharomyces cerevisiae and Pichia fermentans) against soybean pathogenic fungi. The inhibitory activity of Pichia fermentans was previously confirmed against Candida spp. and a sensitive strain of S. cerevisiae to confirm its killer activity.Simple competition plate bioassays were performed using five soybean pathogenic fungi (Alternaria sp., Cercospora kikuchi, Colletotrichum dematium var. truncata, Fusarium oxysporum, and Macrophomina sp.) with a killer isolate of P. fermentans and a non-killer strain of S. cerevisiae. The yeasts tested inhibited 52 to 65% the growth of at least Alternaria sp., Cercospora kikuchi and Colletotrichum dematium var. truncata. This is the first record of the inhibition of Cercospora kikuchi and Colletotrichum dematium var. truncata using yeast strains