Clara H. Hasse
|Clara Henriette Hasse|
|Died||10 October 1926
|Fields||Botanist focused on plant pathology|
|Institutions||Bureau of Plant Industry, U.S. Department of Agriculture; Florida Agricultural Experiment Station|
|Alma mater||University of Michigan|
|Known for||First to identify the cause of citrus canker|
|Author abbreviation (botany)||C.H.Hasse|
Clara Henriette Hasse (1880–10 October 1926) was an American botanist whose research focused on plant pathology. Her paper "Pseudomonas citri, the cause of Citrus canker", published in the Journal of Agricultural Research in 1915, was the first to identify the cause of citrus canker and led to the development of methods for controlling the disease which saved the citrus crops in Florida, Alabama, Texas and Mississippi from being wiped out.
After graduating from the University of Michigan in 1903, she went to Washington, D.C. to take up an appointment as assistant horticulturist and botanist in the Bureau of Plant Industry at the U.S. Department of Agriculture under Erwin Frink Smith, the USDA's pathologist-in-charge. Hasse was one of the twenty assistants that Smith hired during his tenure at the USDA. She later worked at the Florida Agricultural Experiment Station. Hasse died at her home in Muskegon, Michigan, aged 46.
- Harding, Thomas Swann (1980). Two Blades of Grass: A History of Scientific Development in the U.S. Department of Agriculture, p. 324. Ayer Publishing. ISBN 040512547X
- Rossiter, Margaret W. (September 1980). ""Women's Work" in Science, 1880-1910". Isis (The University of Chicago Press on behalf of The History of Science Society) 71 (3): pp. 381–398. Retrieved 04/11/2012.
- "Clara H. Hasse (1880?-1926)". Collection Record. Smithsonian Institution Archives. Retrieved 30 March 2012.
- The Michigan Alumnus (1926), Volume 33, p. 284
- "Author Query for 'C.H.Hasse'". International Plant Names Index.
- Hasse, Clara H. "Pseudomonas citri, the cause of Citrus canker". Journal of Agricultural Research, Vol. IV, No. I, April 15, 1915
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