Determination of antagonistic effect of bio-agents against cereal damping-off caused by Fusarium graminearum in wheat

Abstract The antagonistic effect of the isolates of Gliocladium roseum, Saccharomyces cerevisiae, Sordaria fimicola, and their mixtures, at different concentrations against the cereal damping-off pathogen, Fusarium graminearum, was examined in vitro and in vivo (foliar, seed, soil, seed + soil) treatments on the susceptible wheat cultivars “Gun 91 and Sultan 95.” The 3 isolates inhibited growth of F. graminearum at a concentration of 1 × 109 spores/ml with inhibition rates of 84, 88, and 91%, respectively under in vitro conditions. For in vivo assays, the mixture of S. cerevisiae + S. fimicola exhibited a considerable antagonistic activity even at a concentration of 1 × 105 spores/ml. Particularly, at the seed + soil treatment of the mixture, the pathogen was almost completely suppressed with an inhibition rate above 96% at concentrations of 1 × 108 and 1 × 109 spores/ml for both wheat cultivars, and the percentage of emerged seedlings reached nearly 100%. The results verified that the mixture of S. cerevisiae + S. fimicola had a high potential, as a promising biocontrol agents and an eco-friendly alternative, to be used against the cereal damping-off caused by F. graminearum, to reduce the use of systemic fungicides.

Abstract licence: CC BY-NC-ND

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