. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 100 DISEASES OF CBOPS. be steeped in a solution of copper sulphate or common salt. The Smut Fungus {Ustilago carbo, Fig. 39) pro- duces the well-known black and withered ears of corn. It attacks barley, wheat, and certain grasses, as well as oats. The disease is said to originate in the roots of the host-plants, and passes up the stems into the leaves and. Fig. 39.—The Smut op Coen [Ustilago carbo). A. Oats infested with Ustilago carbo (a). B. " Sori" on a portion of
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 100 DISEASES OF CBOPS. be steeped in a solution of copper sulphate or common salt. The Smut Fungus {Ustilago carbo, Fig. 39) pro- duces the well-known black and withered ears of corn. It attacks barley, wheat, and certain grasses, as well as oats. The disease is said to originate in the roots of the host-plants, and passes up the stems into the leaves and. Fig. 39.—The Smut op Coen [Ustilago carbo). A. Oats infested with Ustilago carbo (a). B. " Sori" on a portion of a glume of oats. 0. Spores x 330 (Zeiss' D., 3oo.). E & D. A spore germinating. panicles. The spikelets (Fig. 39 A) become covered with masses (sori) of black or primary spores, which work their way from within outwards, and ultimately rupture the epidermis of infested plants. The small globular spores are of a dark-brown colour, almost black (Fig. 39 C). These spores give rise to " buds " (Fig. 39 E), which ulti- mately form secondary spores, or conidia. The secondary spores are produced by what is known as the process of. 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
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Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
