Characterization of binucleate isolates of Rhizoctonia cerealis with respect to cereals in North Eastern Poland

In laboratory experiments number of nuclei, diameter of hyphae and influence of temperature on mycelium growth, colour of colony and forming of sclerotia by R. cerealis were observed. A total of isolates from sharp eyespot lesions on wheat and triticale had binucleate hyphal cells and dolipore septa. The optimum temperature for growth of R. cerealis was 25 degrees C, all isolates grew slower than R. solani. Binucleate isolates produced white or brown mycelium with zonation and sclerotia.