Last summer while investigating a cotton disease in Texas, Mr. R. D. Blackshaw called my attention to a disease among some of his Le Conte pear trees.
Proceedings of the Iowa Academy of Sciences
©1889 Iowa Academy of Science, Inc.
Pammel, L. H.
"Some Fungous Diseases of Fruit Trees in Iowa,"
Proceedings of the Iowa Academy of Science, 1(Pt. 1), 91-92.
Available at: https://scholarworks.uni.edu/pias/vol1/iss1/41