In the year 1997 distinct injures on winter wheat cv. Kobra were stated strongly resembling symptoms of infection caused by Fusarium. On prematurely ripening plants a partial or total yellowing of ears was observed, and lower parts of internodes showed brown discoloration. It was stated after careful examination that culms and ears were infested with numerous mites, Tyrophagus longior (Gerv.), not by species of Fusarium. The mites probably contributed to decrease in grain yield. Kernels were small and underdeveloped which influenced the decrease of quality of seeding material.