. Diseases of economic plants. Plant diseases. Pomaceous Fruits 33 tend only partly around the twigs. Old cankers are very rough, and may extend several centimeters longitudinally along the twig, thus giving it a flattened Pt^^. 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-. New York, Macmillan

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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921