. College botany; structure, physiology and economics of plants. Botany. Fig. 133.—Wheat rust; (a) cross-section showing the secial stage on the .barberry; (6) urediniospore; (c) teliospore: (d), germinating' tehospore showing sporidia; (e) pycnidia. The Profo-hasidiomycetes is divided into the Usitila-ginales or smuts and the Uredinales or rusts. The smuts (Fig. 132) attack many plants, but may be characterized by the com smut, TJstila-go maydis. The mycelium works within the host and finally causes swollen, tumor-like growths, which may ap'pear on any part of the plant. When mature, these ma
. College botany; structure, physiology and economics of plants. Botany. Fig. 133.—Wheat rust; (a) cross-section showing the secial stage on the .barberry; (6) urediniospore; (c) teliospore: (d), germinating' tehospore showing sporidia; (e) pycnidia. The Profo-hasidiomycetes is divided into the Usitila-ginales or smuts and the Uredinales or rusts. The smuts (Fig. 132) attack many plants, but may be characterized by the com smut, TJstila-go maydis. The mycelium works within the host and finally causes swollen, tumor-like growths, which may ap'pear on any part of the plant. When mature, these masses are filled with spores which germinate the following spring, producing short filaments. Each filament pro- duces spores which are capable of infecting young plants. The smuts are very destructive to many of our cultivated plants. The grain smuts are among the most important causes of plant diseases and destroy many millions of dollars' worth of gi-ain every year. The rusts (Fig. 133) may be illustrated by the wheat rust,. 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 Cook, Melville Thurston, 1869-1952. Philadelphia and London, J. B. Lippincott Company
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
