. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 398 THE AGRICULTURAL NEWS. Decemcek 10, 1910. FUNGUS NOTES. MISCELLANEOUS FUNGI EXAMINED. RECENTLY Specimens of three interesting fungi have been received recently at the Head Otiice from Mrs. Patterson in St. Vin- cent. They of smut of Guinea corn (Ustilaqo sorghi (Link.) Pass), leaf spot of beet due to Cerco^^ora betiriAa, Sacc, and rust of grape leaves {Uredo vitis, Thumen), USTILAGO soRGHi. This fungus attacks the flowers of several species of the genus Sorghum, and of cultivated sorghums such as Gui
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 398 THE AGRICULTURAL NEWS. Decemcek 10, 1910. FUNGUS NOTES. MISCELLANEOUS FUNGI EXAMINED. RECENTLY Specimens of three interesting fungi have been received recently at the Head Otiice from Mrs. Patterson in St. Vin- cent. They of smut of Guinea corn (Ustilaqo sorghi (Link.) Pass), leaf spot of beet due to Cerco^^ora betiriAa, Sacc, and rust of grape leaves {Uredo vitis, Thumen), USTILAGO soRGHi. This fungus attacks the flowers of several species of the genus Sorghum, and of cultivated sorghums such as Guinea corn {A iidropoijon Sorghum, var. imlgare). It occurs in Europe and America as well as in the West Indies. The parts affected are the ovary and stamens. The former becomes swollen and projects some- what beyond the surrounding glumes or floral leaves. It takes the form of a round-ended cylinder, white at the base and brown from the middle upwards. The brown colour is due to the fact that the upper part of the ovary has been trans- formed into a sac containing a mass of the YlG. 37. Ustil.^go .sorohi. patch of grey dead tissue, bounded by a red spherical brown spores of the fungus. Hyperti'ophied Ovule attacked by the brown border. In some instances, the spots After these spores are ripe, the wall of Fungus. become numerous, and run into —- this sac ruptures, and the spores are shed freely into the air. When this happens, it is ating and producing the fungus again. According to Brefeld, the brown spares will only germinate in a nutri- tive solution, when they give rise to a promycelium and .small lateral conidia, in the usual way. The first form of germiuation is, however, n:ore probably that occurring under natural conditions, as, in such circumstances, the spores would not be able to obtain artificial culture media in which to germinate. CERCOtiPORA BETicoLA. fungus attacks severa different varieties of the beet in Europe and America. Tlie specimens sent were the l
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