Clara H. Hasse

Clara Henriette Hasse (1880 - 10 Ọktoba 1926)bụ onye America na-ahụ maka ihe ọkụkụ nke nyocha ya lekwasịrị anya na pathology osisi. A maara ya maka ịchọpụta ihe kpatara citrus canker, nke na-eyi ihe ọkụkụ egwu na Deep South..

 Akụkọ ndụ 
Hasse attended the University of Michigan. While at U of M, she was appointed an assistant in botany in 1902. Hasse was a founding member of the Women's Research Club at U of M as women were not allowed in the Research Club at the time. After graduating from the University of Michigan in 1903 with a PhB, 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.

 Nnyocha 
Akwụkwọ ya "Pseudomonas citri, ihe kpatara citrus canker", nke e bipụtara na Journal of Agricultural Research na 1915, bụ onye mbụ chọpụtara ihe kpatara citrus canker. Ọ bụ ezie na mbụ a kwenyere na citrus canker sitere na fungoid, Hasse chọpụtara na nje bacteria dị na isi iyi ya.. Hasse wepụrụ nje bacteria, nke a maara ugbu a dị ka Xanthomonas axonopodis pv. citri. E tinyere ọrụ ya na akwụkwọ akụkọ nke Ngalaba Ọrụ Ugbo iji gosipụta ọrịa nke osisi akụ na ụba.

Thomas Swann Harding na-ekwu na nyocha a mere ka "n'ụzọ nchịkwa nke gbochiri ọrịa a ikpochapụ ihe ọkụkụ citrus na Florida, Alabama, Mississippi, na Texas" 

 Akụkụ nke akwụkwọ 

 "Pseudomonas citri, ihe na-akpata ọrịa kansa Citrus", Journal of Agricultural Research, mpịakọta. IV, nke 1, April 15, 1915, peeji nke 97-100

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