Frequent occurrences of high levels of Fusarium mycotoxins have been recorded in Norwegian oat grain. To elucidate the influence of tillage operations on the development of Fusarium and mycotoxins in oat grain, we conducted tillage trials with continuous oats at two locations in southeast Norway. We have previously presented the content of Fusarium DNA detected in straw residues and air samples from these fields. Grain harvested from ploughed plots had lower levels of Fusarium langsethiae DNA and HT-2 and T-2 toxins (HT2 + T2) compared to grain from harrowed plots. Our results indicate that the risk of F. langsethiae and HT2 + T2 contamination of oats is reduced with increasing tillage intensity. No distinct influence of tillage on the DNA concentration of Fusarium graminearum and Fusarium avenaceum in the harvested grain was observed. In contrast to F. graminearum and F. avenaceum, only limited contents of F. langsethiae DNA were observed in straw residues and air samples. Still, considerable concentrations of F. langsethiae DNA and HT2 + T2 were recorded in oat grain harvested from these fields. We speculate that the life cycle of F. langsethiae differs from those of F. graminearum and F. avenaceum with regard to survival, inoculum production and dispersal.
|Original language||English (US)|
|State||Published - Nov 2022|
Bibliographical noteFunding Information:
This work was financed by the Norwegian Ministry of Agriculture and Food and the Foundation for Research Levy on Agricultural Products/Agricultural Agreement Research Fund/Research Council of Norway (research grant 199412/E50) with support from the industry partners Animalia, Bayer Crop Science, Braskereidfoss kornsilo, Felleskjøpet Agri, Felleskjøpet Rogaland og Agder, Fiskå Mølle, Flisa Mølle og Kornsilo, Graminor, Lantmännen Cerealia, Norgesfôr, Norgesmøllene, Norkorn.
© 2022 by the authors.
- Fusarium head blight
- reduced tillage
- straw residues