. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 75. Violet Diseases. a. Alternaria leaf spot, b. Spore stages of Al- ternaria viola c. pure culture of A. viola (a-c after Dorsett).. 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 Taubenhaus, Jacob Joseph, 1884-1937. New York : E. P. Dutton

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