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Summary Cereal grain colonization by pathogenic fungi is affected among other things by availability of pathogen inoculum, weather conditions during plant vegetation and employed cultivation systems. The aim of the study was to determine influence of cultivation method and forecrop on colonization of wheat grain by fungi of the genus Fusarium, and to assess the content of mycotoxins in collected grain. The experiment was carried out in the years 2012 and 2013 in the fields of the Field Experimental Station of the Institute of Plant Protection of the National Research Institute in Winna Gora. Spring wheat cultivar Żura was sown after four different forecrops: rape, beet, corn and wheat. Soil was prepared for the experiments with the traditional and reduced tillage system. During vegetation, wheat crop was protected with fungicides applied at different stages of plant development. The wheat grain collected in the experiments was placed on potato-dextrose-agar (PDA) medium to determine grain colonization by pathogenic fungi. The content of mycotoxins: deoxynivalenol (DON) and zearalenone (ZEA) in flour obtained from the collected grain was assessed with the ELISA method. The greatest colonization of spring wheat grain by fungi of the genus Fusarium in the both years of the research was observed in cultivation after beet. The content of deoxynivalenol and zearalenone in all the examined samples did not exceed the European Union maximum acceptable levels of mycotoxins in cereal products.

Influence of cultivation system and forecrop on colonization by fungi of the genus Fusarium and mycotoxin content in grain of spring wheat