A Ten-Year Trend Analysis of Fusarium Mycotoxins in Croatian Maize (2014–2024)

Maize is one of the most important agricultural crops that has been cultivated in the Republic of Croatia for centuries. Fusarium mycotoxins as secondary metabolites of molds that naturally contaminate maize crops can have negative effects on human and animal health, but also on economic aspects. The aim of this study was to monitor the trend of natural occurrence of Fusarium mycotoxins in maize crops from Croatia during a period of 10 years, from 2014 to 2024. A total of 1285 maize samples were analyzed for the contents of zearalenone (ZEN), deoxynivalenol (DON), fumonisins B (FUM) and T-2/HT-2 toxin (T-2/HT-2) using validated ELISA methods. A high occurrence of the analyzed mycotoxins was found in all years examined, e.g., for ZEN 15–64%, DON 47–95%, FUM 60–96% and T-2/HT-2 24–89%. In addition, their concentrations ranged from 3.2–10,990 μg/kg, 18–25,000 μg/kg, 29–18,180 μg/kg and 9–595 μg/kg, respectively. The mycotoxin concentrations were found to differ from year to year, with an increasing trend observed for FUM and T-2/HT-2 in terms of concentrations and an increasing trend in the occurrence of all mycotoxins, with the exception of T-2/HT-2.