. Bulletin. Plant diseases -- United States. Bull. 20, Div. Veg. Phys. & Path , U. S Dept of Agriculture. Plate XXVIII, CD t; > 3? O â > s 33 2 m ^ O X 3) B > !T 33 a CO I If '-'' â¬â *â. ' â¢.* >-"r- ^j. 1 iL T ' JSHf .(*â *^4S**'^ ^ s«''*«^^***, 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 United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O.

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