. Diseases of economic plants. Plant diseases. 388 DISEASES OF ECONOMIC PLANTS dies, and shrivels. The rust is conveyed from plant to plant throughout the summer by spores of this stage. The teleutospores may appear in the same sori with the uredospores or in separate sori, and in either event come. Fig. 166. — Clover leaf showing sori of rust. Original. later in the season. They are recognized by their darker brown color. The cluster-cup stage, which is less abun- dant and less injurious than the other stages, may often pass unnoticed. It appears first as pale swollen regions upon the leaf or
. Diseases of economic plants. Plant diseases. 388 DISEASES OF ECONOMIC PLANTS dies, and shrivels. The rust is conveyed from plant to plant throughout the summer by spores of this stage. The teleutospores may appear in the same sori with the uredospores or in separate sori, and in either event come. Fig. 166. — Clover leaf showing sori of rust. Original. later in the season. They are recognized by their darker brown color. The cluster-cup stage, which is less abun- dant and less injurious than the other stages, may often pass unnoticed. It appears first as pale swollen regions upon the leaf or petiole. These regions soon show the characteristic cups with orange-colored spores. The cluster- cup stage, though not known on red clover, predominates. 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
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
