1994 Volume 60 Issue 4 Pages 448-453
The forma specialis and cultural and morphological characters of a F. oxysporum, the dry rot pathogen of taro (Colocasia esculenta), were examined. No forma specialis which corresponded to the family Araceae has been reported. The host range of the dry rot pathogen differed from that of the following 17 formae speciales: lycopersici race 2, melongenae, cucumerinum, melonis, niveum, lagenariae, conglutinans, cepae, allii, asparagi, arctii, batatas, spinaciae, fabae, fragariae, radicis-lycopersici and raphani. As a result, it was proposed to establish a new forma specialis, Fusarium oxysporum f. sp. colocasiae, and rename the disease “wilt” to differentiate this disease from taro dry rot caused by F. solani f. sp. radicicola.
