Additions to the Host Range of Fusarium oxysporum f. sp. radicis-lycopersici. J. G. Menzies, Agriculture Canada Research Station, Agassiz, British Columbia, Canada VOM 1A0. C. Koch, and F. Seywerd. Agriculture Canada Research Station, Agassiz, British Columbia, Canada VOM 1A0. Plant Dis. 74:569-572. Accepted for publication 15 December 1989. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0569.

Forty-seven species and 11 varieties within five of those species from 15 botanical families were inoculated by a root-dip technique with four isolates of Fusarium oxysporum f. sp. radicis-lycopersici. Random sections from roots and crowns of symptomless plants and root and crown sections displaying lesions from infected plants were surface-sterilized and placed on Komada’s Fusarium-selective medium. Colonies formed on the selective medium were identified as F. o. f. sp. radicis-lycopersici with the use of a tomato seedling test on water agar. Thirty-seven of the 53 plant species and varieties were infected by at least one of the four F. o. f. sp. radicis-lycopersici isolates. Highly susceptible species, including Lycopersicon esculentum, were observed from the Solanaceae, Leguminosae, Cucurbitaceae, and Chenopodiaceae. Several symptomless hosts were identified.