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Influence of agronomic factors on fusarium and mycotoxins spectra winter wheat in Poland

Zuzanna Sawinska: Departament of Agronomy, Poznan University of Life Sciences

<div>Fusarium head blight is one of the most important cereal diseases worldwide. Cereals differ in terms of the main occurring Fusarium species and the infection is influenced by various factors, such as weather and cropping measures. Little is known about Fusarium species in winter wheat in Poland, hence harvest samples from growers were collected in 2016 and 2017, along with information on respective cropping factors. The incidence of different Fusarium species was obtained by using a seed health test and mycotoxins were quantified by GC-MS/MS. With these techniques, the most dominant species, in 2016 is F. poae and in 2017 is F. graminearum, and the most prominent mycotoxin, deoxynivalenol (DON), were identified. Between the two main Poland fungicide protection systems, extensive and intensive, we observed differences with the fusarium lowest incidence and toxin accumulation in fungicide application on flowering (BBCH 65-69) winter wheat. We observed that wheat samples from fields with maize as previous crop had a substantially higher Fusarium incidence and elevated mycotoxins accumulation compared with other previous crops. Further factors increasing Fusarium infection and NIV concentration were high nitrogen fertilisation. Results from the current study can be used to develop optimized cropping systems that reduce the risks of mycotoxin contamination.</div>