Spatial dynamics of T-2 and HT-2 toxins in Swedish oats

Abstract

The contents of T-2 and HT-2 toxins (T2+HT2) were analysed in 677 samples of oats delivered to silos in Sweden during the years 2020─2022. The spatial and temporal variation patterns in the prevalence of elevated T2+HT2 con-tents were explored and the covariation with temperature means or precipitation sums computed for windows of 15 days and T2+HT2 levels in the previous year were tested. There was a statistically significant spatial variation structure (Moran’s I; p< 0.05) in two of the years, and high T2+HT2 content was positively related to high content the previous year (p< 0.001). There were positive correlations between T2+HT2 content and warm weather in July and negative correlations with precipitation in May and July in two of the years. This is the first time a pronounced regional variability for T2+HT2 is presented. The results can be valuable when searching for safe regions to produce grains intended for food for infants. In a sampling campaign in 11 fields, it was found that T2+HT2-levels can vary substantially within fields.

Keywords

cereals; Fusarium toxins; spatial variability; weather variables; baby foods

Published in

Agricultural and Food Science
2024, volume: 33, number: 4, pages: 296–306

SLU Authors

• Persson, Kristin

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Other Agricultural Sciences not elsewhere specified

Publication identifier

• DOI: https://doi.org/10.23986/afsci.146831

Permanent link to this page (URI)

https://res.slu.se/id/publ/139819