Pear-blight. Pot experiments in control of pear blight by fertilizers and chemicals. Tow of the six trees shown were inoculated and blighted. Dept. grounds, Washington, September, 1894.

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Unknown. “Pear-blight. Pot experiments in control of pear blight by fertilizers and chemicals. Tow of the six trees shown were inoculated and blighted. Dept. grounds, Washington, September, 1894..” Special Collections, USDA National Agricultural Library. Accessed October 15, 2024, https://www.nal.usda.gov/exhibits/speccoll/items/show/279.