. Diseases of field crops. Plant diseases. Diseases of Field Crops 55 gus Pythium arrhenomanes, increases, spreads, and persists in the soil so that susceptible plants can no longer be grown. The disease is confined mainly to milo. Resistant strains of milo have been developed for planting on soil in- fested with this disease. Information regarding seed may be obtained. Fig. 34.—A, Loose smut of sorghum; B, kernel smut of sorghum. (From Bui. 511.) from the Division of Agronomy, College of Agriculture, Davis. Suscep- tible varieties should not be planted on soil where root rot is present. Rust.


. Diseases of field crops. Plant diseases. Diseases of Field Crops 55 gus Pythium arrhenomanes, increases, spreads, and persists in the soil so that susceptible plants can no longer be grown. The disease is confined mainly to milo. Resistant strains of milo have been developed for planting on soil in- fested with this disease. Information regarding seed may be obtained. Fig. 34.—A, Loose smut of sorghum; B, kernel smut of sorghum. (From Bui. 511.) from the Division of Agronomy, College of Agriculture, Davis. Suscep- tible varieties should not be planted on soil where root rot is present. Rust.—A true rust, Puccinig, purpurea, causes purple spots on the leaves, with small, dark-brown, spore pustules of the fungus. The sweet sorghums are much more susceptible than the milo varieties. There are no methods of control for this disease. Smut.—In closed-kernel smut, caused by Sphacelotheca sorghi ( 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 Smith, Ralph E. (Ralph Eliot), 1874-1953. Berkeley, Calif. : College of Agriculture, University of California


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