大麥及〓麥の腥黒穗病に就て(豫報)
1925 年 1 巻 6 号 p. 31-41
詳細
1925 年 1 巻 6 号 p. 31-41
In July, 1913, a stinking smut was first discovered on the barley (Hordeum sativum, Jessen var. vulgare) in Nagano prefecture and a few years later in Yamagata (1917?) and Gumma (1918) respectively. In May, 1923, not only the barley but also the naked barley (Hordeum sativum var. hexastichon=Hadaka-mugi) was reported as the host in Iwate prefecture.
The regions above mentioned are all comparatively the northern and colder portion of Japan and at present the smut is not known in other prefectures (southern). From this fact it seems that the disease has some relation to the climate.
By our investigations, it was concluded that this stinking smut, though it has first recognized in 1913, has no doubt occured since many years ago and was confused with the stinking smut of wheat (Tilletia Tritici and T. levis) by its similar odour and the covered smut of barley (Ushilago Hordei) by the resembrance of the affected ears.
By comparing with Tilletia Bornmülleri, T. Hordei, T. levis, T. Secalis, T texana, T. Trabuti, T. Tritici and T. Pancicii, we found our stinking smut fungus correspond to Tilletia Pancicii Bub. et Ran. which was originally described by Bubàk in 1909 (Zeitschr. f. d. landwirt. Versuchs. in Oesterreich Jg. 12, S. 545-549, 1909).
The result of macro-and microscopical studies is as follows:
Sori within the ovary, blakish brown in color, concealed by the glumes, compact and not dusty, when rubbed smell an offensive fishy odour. Spores mostly globose, 18.4-23.3μ. (mostly 21.3μ.) in diam. or subglobose to ellipsoid, 19.4-26.2μ long, 18.4-22.3μ broad. Epispore blakish brown, reticulated with raised ridges 1.9-3.9μ high, 1.9-5.9μ in diameter.
On Hordeum sativum, Jessen var. vulgare and hexastichon.
