Isolation of mycoparasite Verticillium biguttatum from sclerotia of Rhizoctonia solani in the United Kingdom

Verticillium biguttatum was isolated from sclerotia of Rhizoctonia solani removed from black scurf- infected potato tubers which had been field-grown in the UK. Two isolates were identified by means of morphological and physiological characteristics, together with their ability to overgrow cultures of R. solani. A Dutch isolate M73 was used for comparison