On the form name and race of Hypomyces solani (Rke. et Berth.) Snyd. et Hans. which is pathogenic to the mulberry trees

Abstract

The writers^{4, 5)} reported in 1957 that Hypomyces solani (Rke. et Berth.) Snyd. et Hans.[Fusarium solani (Mart.) Snyd. et Hans.]was another causal fungus of Fusarium blight of mulberry trees, and the strains of this fungus, isolated from mulberry stems, were divided into two groups (α and β). In this paper the host ranges and the form names of the two groups are dealt with.
The cross-inoculations were carried out among these fungi and 6 forms of F. solani, i. e. f. cucurbitae, f. eumartii, f. radicicola, f. phaseoli, f. pisi and f. batatas.
The α group of the fungus was pathogenic on mulberry stems, but was non-pathogenic to squash seedlings, potato stems, potato tubers, bean seedlings, pea seedlings and sweet potato sprouts. On the other hand, the 6 forms of F. solani proved to be non-pathogenic on mulberry stems though they were severely parasitic on their own hosts. From these results, the writers propose the following name for the α group of the fungus.
Hypomyces solani (Rke. et Berth.) Snyd. et Hans. f. mori Sakurai et Matuo, nom. nov.
[Fusarium solani (Mart.) Snyd. et Hans. f. mori Sakurai et Matuo, nom. nov.]
Hab. in vivis Mori, cetra ut in typo⁷⁾.
The β group of the fungus was pathogenic not only on mulberry stems (less virulent than α group) but also to pea seedlings and sweet potato sprouts and most vigorously to potato tubers. So the writers designate the β group Hypomyces solani (Rke. et Berth.) Snyd. et Hans. f. radicicola race 2[Fusarium solani (Mart.) Snyd. et Hans. f. radicicola race 2], and call the former f. radicicola, which causes the dry rot of potato tubers and is non-pathogenic on mulberry trees, F. solani (Mart.) Snyd. et Hans. f. radicicola race 1.
The type cultures are deposited in Fac. Tex. Seric., Shinshu Univ., Ueda, Japan, which were isolated from mulberry trees suffered from the blight disease.