. Diseases of economic plants. Plant diseases. CEREALS 363. ance. The smutted grains are at first covered by a white, later gray, membrane. This membrane in time becomes broken by the winter exposure and frees the dark-colored spores. The disease was reported by Kellerman in 1891 as limited to sorghum grown from imported seed. It was then known in District of Columbia, Wis- consin, New York, Nebraska, and Kansas. It is widespread in Europe, Africa, and Asia, and was probably im- ported into the United States upon diseased seed. It was first recorded in the United States in 1884, and is now fou
. Diseases of economic plants. Plant diseases. CEREALS 363. ance. The smutted grains are at first covered by a white, later gray, membrane. This membrane in time becomes broken by the winter exposure and frees the dark-colored spores. The disease was reported by Kellerman in 1891 as limited to sorghum grown from imported seed. It was then known in District of Columbia, Wis- consin, New York, Nebraska, and Kansas. It is widespread in Europe, Africa, and Asia, and was probably im- ported into the United States upon diseased seed. It was first recorded in the United States in 1884, and is now found in almost all places where sorghum is grown. According to Clinton's estimates it may prevail upon from 4 to 32 per. cent of the plants. The same investigator found that the yield in juice was lessened about 30 per cent, owing to the smaller size of the smutted plants. As with oats, this smut can gain entrance to the host only during the very young seedling state, before the plants appear above ground. The mycelium of the causal fungus grows through the plant until flowering time without any symptoms of its presence. At blossoming time the fungus seeks the ovary, destroys it, and becomes evident as smut. Disinfection of the seed is an efficient remedy. The seed Fig. 158. — Three viewa of sorghum kernel smut. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870- joint author. New York, The Macmillan Company
Size: 2126px × 1175px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
