The issue of moulds and, thus, contamination with mycotoxins is very topical, particularly in connexion with forages from grass stands used at the end of the growing season. Deoxynivalenol (DON), zearalenone (ZEA), fumonisins (FUM) and aflatoxins (AFL) are among the most common mycotoxins. The aim of the paper was to determine concentrations of mycotoxins in selected grasses (Lolium perenne, Festulolium pabulare, Festulolium braunii) and their mixtures with Festuca rubra an/or Poa pratensis during the growing season as a marker of grass safety, which was assessed according to content of the aforementioned mycotoxins. During the growing season grass forage was contaminated with mycotoxins, most of all by DON and ZEA. The contents of AFL and FUM were zero or below the limit of quantification. Moreover, the level of the occurrence of mould was quantified as ergosterol content, which was higher at the specific date of cut. All results were statistically processed and significant changes were discussed.

• Keywords
• aflatoxins, contamination, deoxynivalenol, forage, fumonisins, grass, mycotoxins, zearalenone,
• MeSH
• Aflatoxins analysis   MeSH
• Enzyme-Linked Immunosorbent Assay MeSH
• Ergosterol analysis   MeSH
• Festuca chemistry   microbiology   MeSH
• Fumonisins analysis   MeSH
• Fungi isolation & purification   MeSH
• Poisons analysis   MeSH
• Lolium chemistry   microbiology   MeSH
• Food Contamination analysis   MeSH
• Animal Feed analysis   microbiology   toxicity   MeSH
• Poaceae chemistry   microbiology   MeSH
• Mycotoxins analysis   MeSH
• Poa chemistry   microbiology   MeSH
• Food Microbiology MeSH
• Seasons MeSH
• Trichothecenes analysis   MeSH
• Zearalenone analysis   MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Geographicals
• Czech Republic MeSH
• Names of Substances
• Aflatoxins MeSH
• deoxynivalenol MeSH Browser
• Ergosterol MeSH
• Fumonisins MeSH
• Poisons MeSH
• Mycotoxins MeSH
• Trichothecenes MeSH
• Zearalenone MeSH