. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 397 advances. These spores are 20-35 * T5â22/*> an<i a spore ger- minates by the production of the characteristic promycelium, di- vided ordinarily into four cells, each producing its sporidium. The germination of the teleutospore would seem to take place ordinarily several weeks prior to the appearance of the spermogonium and aecidium, both of which arise only from teleutosporic infection. Sydow accepts the separation of the rust of clovers into two spe-
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 397 advances. These spores are 20-35 * T5â22/*> an<i a spore ger- minates by the production of the characteristic promycelium, di- vided ordinarily into four cells, each producing its sporidium. The germination of the teleutospore would seem to take place ordinarily several weeks prior to the appearance of the spermogonium and aecidium, both of which arise only from teleutosporic infection. Sydow accepts the separation of the rust of clovers into two spe- cies. The absence of stages O, I, also the more numerous germ- pores in II, distinguish the form on red clover from that on Fig. 196. Uromyces appendiculatus: Rust of Beans. (Photograph by H. H. Whetzel) As a rule, control measures seem to be unnecessary; at any rate no practical preventive methods are known. V. RUST OF BEANS Uromyces appendiculatus (Pers.) Lev. De Bary, A. Recherches sur Ie developpement de quelques champignons parasites. Ann. d. Sci. nat. Bot. (Se"r. 4) 20: 68-99. 1863. Whetzel, H. H. Bean Rust. Cornell Agl. Exp. Sta. Built. 239: 298-299. figs. 1â 13-115- i9°6- This fungus is widely distributed, occurring on the bean {Phaseo- lus vulgaris) and other related species. It is also reported in south- ern latitudes on relatives of the cowpea, such as Dolichos omatus,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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