Fusarium species complex infecting oat in Manitoba.

Citation

Banik, M., Beyene, M. and Wang. X. 2016. Fusarium species complex infecting oat in Manitoba. 2016 annual meeting of Canadian phytopathology society. Delta beausejour hotel, Moncton, Canada, June 12-15.

Résumé

In recent years, Fusarium head blight (FHB) emerged to be one of the most important diseases on oat, especially in Canadian Prairies. Several Fusarium species can infect oat and produce different mycotoxins in contaminated grains which cause immunosuppression and various health issues when consumed by human and animals. This has raised concerns among industries and producers since oat has become desirable for human consumptions due its high nutritional value. Of special interest among Fusarium mycotoxins are the trichothecenes (e.g., T-2 and HT-2 toxins produced by F. sporotrichioides), deoxynivalenol (DON, mainly produced by F. graminearum and F. culmorum) as well as beauvericin and enniatin (mainly produced by F. poae). In this study, we surveyed Fusarium species infecting oat in Manitoba from 2014 to 2016. Oat samples were collected from commercial oat fields in Manitoba. Species identification was performed based on morphological characteristics and species-specific PCR. Fusarium biomass in contaminated grain was assessed by real time qPCR using primer sets specific to F. poae, F. graminearum and F. sporotrichioides. In addition, we inoculated two oat varieties (Legget and Dancer) with F. poae, F. graminearum and F. sporotrichioides either individually or in combinations. The preliminary results indicate F. poae is the most common Fusarium species found in field samples and the presence of synergistic effects when oat kernels are infected by more one Fusarium species indicating that Fusarium species infecting oat is more diverse than Fusarium species infecting wheat and mycotoxins other than DON should be considered.

Date de publication

2016-06-12

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