Die Bedeutung von Unkräutern für die Übertragung von Rhizoctonia solani Kühn: IV. Die rolle der Unkräuter bei der Überwinterung des Erregers

Abstract

In Model trials the overwintering of Rhizotonia solani Kuehn in different substrates with and without naturally infected plant materials has been studied. The results we obtained demonstrate that R. solani is able to overwinter like mycelium or sclerotia in sand and soil without organic debris. We observed a higher parasitic activity of the fungus in soil than in sand. The survival of the pathogen in soil is more promoted by addition of naturally infected roots of weeds than by burying of colonized potato tubers.