. Diseases of economic plants. Plant diseases. 302 Diseases of Economic Plants The grains, usually only a few in each head, become en- larged, spherical, 5 mm. or more thick, and coated with a dark green powder. Some- times a yellow color prevails instead of the green. In sec- tion the interior is seen to be filled with a compact white mass bordered by a brownish yellow zone, then by the green coating. Though the disease has been known in Louisiana for ten or. Fig. 159. — Rice showing "; After Fulton. more years, and is present to some extent in most fields, it is not cons
. Diseases of economic plants. Plant diseases. 302 Diseases of Economic Plants The grains, usually only a few in each head, become en- larged, spherical, 5 mm. or more thick, and coated with a dark green powder. Some- times a yellow color prevails instead of the green. In sec- tion the interior is seen to be filled with a compact white mass bordered by a brownish yellow zone, then by the green coating. Though the disease has been known in Louisiana for ten or. Fig. 159. — Rice showing "; After Fulton. more years, and is present to some extent in most fields, it is not considered serious, since rarely more than per cent of the heads, and only a few grains per head, are affected. Black-smut^''^ (Tilletia horrida Tak.). — A dark, unsalable flour, made from rice in the region of Georgetown, S. C, was reported in 1898. Anderson found that many heads of rice from these fields bore as much as 25 per cent of smutted grains. This smut was probably imported from Japan in infected seed, but due to the immediate action of Anderson and Walker the pest seems to have been completely stamped. 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- [from old catalog]; Hall, John Galentine, 1870- [from old catalog] joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
