death_place death_date fields workplaces birth_date known_for image article_title author_abbrev_bot name alma_mater
muskegon , michigan 10 october 1926 botanist focused on plant pathology bureau ; florida agricultural experiment station of plant industry , u.s. department of agriculture 1880 first to identify the cause of citrus canker clara h hasse.jpg clara h. hasse
 c.h.hasse clara henriette hasse university of michigan
clara h. hasse

clara henriette hasse -lrb- 1880 -- 10 october 1926 -rrb- 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 .
