THE OCCURRENCE OF FUSARIUM SPECIES IN CANADA: III. TAXONOMY OF FUSARIUM SPECIES IN THE SEED OF VEGETABLE, FORAGE, AND MISCELLANEOUS CROPS

Abstract

A taxonomic study was made of isolates of Fusarium obtained from a microbiological examination of seed from a total of 44 species and botanical varieties of cultivated plants. These plants may be classed as vegetable, forage, and miscellaneous crops. Most of the seed samples originated from stocks produced in Canada, but some were seed from other countries. A total of 16 species, varieties, and forms of Fusarium, classified in eight sections of the genus, were encountered among the isolates that were obtained from seed; they are F. poae (Pk.) Wr., F. sporotrichioides Sherb., F. arthrosporioides Sherb., F. avenaceum (Fr.) Sacc, F. semitectum Berk. & Rav., F. acuminatum Ell. & Ev., F. compactum (Wr.) Gordon, F. equiseti (Cda.) Sacc, F. culmorum (W. G. Sm.) Sacc, F. graminearum Schwabe, F. sambucinum Fuckel, F. sambucinum var. coeruleum Wr., F. moniliforme Sheld. em. S. & H., F. oxysporum Schlecht. em. S. & H., F. oxysporum f. lini (Bolley) S. & H., F. solani (Mart.) App. & Wr. em. S. & H. From the seed of a total of 44 species and botanical varieties of host plants, F. equiseti was identified among isolates from 34; F. poae and F. oxysporum each from 18; F. acuminatum from 17; F. avenaceum from 16; F. culmorum, from 10; F. sambucinum and F. moniliforme each from five; F. graminearum and F. sambucinum var. coeruleum each from four; F. solani from three; F. sporotrichioides from two; F. arthrosporioides, F. semitectum, F. compactum, and F. oxysporum f. lini each from one. The origin of the seed samples of each host is given.