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Fusarium species and enniatin mycotoxins in wheat, durum wheat, triticale and barley harvested in France

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Abstract

Contamination with enniatins A, A1, B and B1 was investigated in 1240 samples of small grain cereals (470 wheat, 260 durum wheat, 282 spring barley, 172 triticale and 56 winter barley) from the French harvests of 2012 to 2014. Associations with Fusarium avenaceum, F. tricinctum and F. poae were assessed, with the identification of Fusarium species by real-time PCR and mycotoxin quantification by LC–MS/MS. Enniatins were common in the fields sampled. Enniatin concentrations varied between years but were consistently highest on spring barley (mean values of 199 to 1316 μg/kg) and triticale (mean values from 131 to 1218 μg/kg), and lower on wheat (mean values from 47 to 142 μg/kg) and durum wheat (mean values from 55 to 596 μg/kg). The concentrations of the various enniatins were strongly correlated with each other (Pearson’s correlation coefficient of 0.61 to 0.98). Enniatin B was the most frequent (68% of the total enniatin content), followed by enniatin B1 (22%), enniatin A1 (7%) and enniatin A (3%). Fusarium species were quantified by calculating arithmetic mean total DNA levels. F. tricinctum was the most abundant (0.177 pg/ng total DNA), followed by F. avenaceum (0.141 pg/ng total DNA) and F. poae (0.091 pg/ng total DNA). Total DNA levels for each species, and the predominant species varied between years and crops. Small grain cereal species (p value < 0.001), harvest year (p value = < 0.001) and the presence of F. avenaceum (p value < 0.001), F. tricinctum (p value < 0.001) or F. poae (p value = 0.017) affected enniatin content. F. tricinctum was the leading enniatin producer on durum wheat (29% to 45%) and spring barley (23 to 37%). F. avenaceum produced large amounts of enniatins on durum wheat (13% to 17%) and wheat (1% to 18%) and was the leading producer on triticale (30% to 55%). F. poae made a minor contribution on all crops, never accounting for more than 2% of total enniatin content. Enniatins are, thus, highly prevalent in French small grain cereals and are mostly produced by F. avenaceum and F. tricinctum.

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Data availability

The raw datasets generated and analysed in this study are very large and are not publicly available: they are the property of ARVALIS-Institut du végétal. All data generated or analysed during this study are included in this published article in the form of descriptive tables.

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Acknowledgments

We thank FranceAgriMer and all the farmers involved for their commitment to this study.

We also thank the ARVALIS-Institut du végétal technical team in Villerable for cleaning and preparing all the samples analysed.

Funding

We thank FranceAgriMer for the financial support.

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Correspondence to Béatrice Orlando.

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Orlando, B., Grignon, G., Vitry, C. et al. Fusarium species and enniatin mycotoxins in wheat, durum wheat, triticale and barley harvested in France. Mycotoxin Res 35, 369–380 (2019). https://doi.org/10.1007/s12550-019-00363-x

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  • DOI: https://doi.org/10.1007/s12550-019-00363-x

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