Abstract
In an approach toward the identification of ecofriendly compounds for fusarium head blight biocontrol, the in vitro antifungal activity of 5-n-alkylresorcinol (AR) extracts, obtained from durum wheat intact kernels, was tested. In comparison with ethyl acetate and acetone extracts containing AR, total inhibition of Fusarium graminearum spore germination was observed with cyclohexane extract, which also exhibited a significant fungistatic activity against F. graminearum, Fusarium culmorum, Fusarium avenaceum, and Fusarium poae. Additionally, the study of the influence of such variables as predrying of seeds and durum wheat genotype on AR cyclohexane extract properties allowed the association of its highest antifungal activity with the AR homologue composition and, in particular, with the presence of a higher C21:0/C23:0 ratio. The interesting finding of this study suggests a potential application of the AR homologues in crop protection systems and could be an important step toward the development of commercial formulations suitable to the prevention of fungal diseases.
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