Clara H. Hasse

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Clara Henriette Hasse
U.S. Department of Agriculture; Florida Agricultural Experiment Station
Author abbrev. (botany)C.H.Hasse

Clara Henriette Hasse (1880 – 10 October 1926) was an American

botanist whose research focused on plant pathology. She is known for identifying the cause of citrus canker, which was threatening crops in the Deep South
.

Biography

Hasse attended the University of Michigan. While at U of M, she was appointed an assistant in botany in 1902.

U.S. Department of Agriculture under Erwin Frink Smith, the USDA's pathologist-in-charge.[3] 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.[5] Hasse died at her home in Muskegon, Michigan, aged 46.[6]

Research

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. While originally it was believed that citrus canker was of fungoid origin, Hasse found that bacteria are at its source.[7] Hasse isolated the bacteria, now known as Xanthomonas axonopodis pv. citri[8][9]. Her work was included in Department of Agriculture bulletins to index the diseases of economic plants.[10]

Thomas Swann Harding credits this research with resulting "in control methods which prevented this disease from wiping out the citrus crop in Florida, Alabama, Mississippi, and Texas."[11]

Partial bibliography

The standard author abbreviation C.H.Hasse is used to indicate this person as the author when citing a botanical name.[12]

References

  1. ^ University of Michigan. Board of Regents. "Proceedings of the Board of Regents (1901-1906)".
  2. ^ Michigan, University of (2000). The University of Michigan, an encyclopedic survey ... Wilfred B. Shaw, editor.
  3. ^
    S2CID 143706974
    .
  4. ^ Michigan, University of (1900-01-01). Calendar of the University of Michigan for ... The University.
  5. ^ "Clara H. Hasse (1880?-1926)". Collection Record. Smithsonian Institution Archives. Retrieved 30 March 2012.
  6. ^ The Michigan Alumnus (1926), Volume 33, p. 284
  7. ^ PSEUDOMONAS CITRI, THE CAUSE OF CITRUS CANKER (archive.org book reader)PSEUDOMONAS CITRI, THE CAUSE OF CITRUS CANKER (archive.org text version), Clara Hasse, Journal of Agricultural Research, 2015-10, Volume 4, p. 97.
  8. doi:10.5962/bhl.title.68463
    .
  9. ^ "Citrus canker". Citrus canker. Retrieved 2020-05-02.
  10. ^ Killough, Hugh Baxter (1926). "Department Bulletin No. 1366". United States Department of Agriculture.
  11. ^ Thomas Swann Harding (1947). Two Blades Of Grass. Norman University Of Oklahoma Press. p. 324.
  12. ^ International Plant Names Index.  C.H.Hasse.

External links


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