Some characteristics of isolates of Rhizoctonia solani from patch of wheat and barley

Abstract

<i>Rhizoctonia</i>-like fungi were isolated from the roots of discased wheat and barley plants sampled from the centre and periphery of bare patches and from apparently healthy plants from outside of the patches. Of the isolates recovered. 89% were multinucleate and belonged to <i>R. solani</i> anastomosis groups: AG-8, AG-2-2 and AG-4. The remaining isolates were binucleate <i>Rhizoctonia</i> spp. The multinucleate isolates of <i>R. solani</i> were all pathogenic. All the binucleate isolates were non-pathogenic. The AG-8 isolates of <i>R. solani</i> were obtained morę frequently from the plants within the patches than outside the patches. The highly virulent isolates of AG-8 were not found outside the patches. Isolates of anastomosis groups AG-2-2, AG-4 and saprotrophic isolates of AG-8 noted less frequently within the patches.

Determination of root rot diseases in wheat and barley cultivation areas in Kırşehir and Kırıkkale provinces

“…Başka bir çalışmada ise Polonya'da hastalıklı buğday ve arpa alanlarından izole edilen etmenlerin %89'u çok çekirdekli R. solani AG 8, AG 2-2 ve AG 4 olarak tespit edilmiştir. Bulaşık alan dışından izole edilen AG 8'ler hariç, R. solani AG'lerinin hepsi patojenik bulunmuştur (Frugal-Wegrzycka et al 1998). W. circinata var.…”