Agronomic Factors Influencing the Scale of <em>Fusarium</em> Mycotoxin Contamination of Oats

• DOI: 10.20944/preprints202110.0266.v1
• Publication Date: 2021-10-20T08:08:44Z
• Authors: Oluwatobi Kolawole; Karl DeRuyck; Brett Greer; Julie Meneely; Fiona Doohan; Martin Danaher; Christopher Elliott
• Keywords: cereals; 2. Zero hunger; agronomy; QH301-705.5; name=SDG 2 - Zero Hunger; agricultural practices; 04 agricultural and veterinary sciences; 15. Life on land; 630; Article; <i>Fusarium</i>; agricultural_sciences_agronomy; 0404 agricultural biotechnology; Fusarium; statistical analysis; mycotoxins; /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger; mycotoxigenic fungi; /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger; name=SDG 2 - Zero Hunger; Biology (General); oats

Seven agronomic factors (crop season, farming system, harvest date, moisture, county, oat variety, and previous crop) were recorded for 202 oat crops grown across Ireland, and samples were analysed by LC-MS/MS for four major Fusarium mycotoxins: deoxynivalenol (DON), zearalenone (ZEN), T-2 toxin and HT-2 toxin. Type A trichothecenes were present in 62% of crops, with 7.4% exceeding European regulatory limits. DON (6.4%) and ZEN (9.9%) occurrences were rela-tively infrequent, though one and three samples were measured over their set limits respectively. Overall, the type of farming system and the previous crop were the main factors identified to significantly influence mycotoxin prevalence or concentration. Particularly, adherence to an organic farming system and growing oats after a previous crop of grass were found to decrease contamination by type A trichothecenes. These are important findings and may provide valuable insights for many other types of cereals crops as Europe moves towards a much greater organic based food system.