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.mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox biography vcard"><tbody><tr><th colspan="2" class="infobox-above" style="font-size:125%;"><div class="fn">Clara Henriette Hasse</div></th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Clara_H_Hasse.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Clara_H_Hasse.jpg/220px-Clara_H_Hasse.jpg" decoding="async" width="220" height="319" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/0/04/Clara_H_Hasse.jpg 1.5x" data-file-width="283" data-file-height="410" /></a></span></td></tr><tr><th scope="row" class="infobox-label">Born</th><td class="infobox-data">1880</td></tr><tr><th scope="row" class="infobox-label">Died</th><td class="infobox-data">10 October 1926<br /><div style="display:inline" class="deathplace"><a href="/wiki/Muskegon,_Michigan" title="Muskegon, Michigan">Muskegon</a>, Michigan</div></td></tr><tr><th scope="row" class="infobox-label">Alma mater</th><td class="infobox-data"><a href="/wiki/University_of_Michigan" title="University of Michigan">University of Michigan</a></td></tr><tr><th scope="row" class="infobox-label">Known for</th><td class="infobox-data">Identified the cause of <a href="/wiki/Citrus_canker" title="Citrus canker">citrus canker</a></td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"><b>Scientific career</b></td></tr><tr><th scope="row" class="infobox-label">Fields</th><td class="infobox-data category"><a href="/wiki/Botanist" class="mw-redirect" title="Botanist">Botanist</a> focused on <a href="/wiki/Plant_pathology" title="Plant pathology">plant pathology</a></td></tr><tr><th scope="row" class="infobox-label">Institutions</th><td class="infobox-data">Bureau of Plant Industry, <a href="/wiki/U.S._Department_of_Agriculture" class="mw-redirect" title="U.S. Department of Agriculture">U.S. Department of Agriculture</a>; Florida Agricultural Experiment Station</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Author_citation_(botany)" title="Author citation (botany)">Author abbrev. (botany)</a></th><td class="infobox-data">C.H.Hasse</td></tr><tr style="display:none"><td colspan="2"> </td></tr></tbody></table> <p><b>Clara Henriette Hasse</b> (1880 – 10 October 1926) was an American <a href="/wiki/Botanist" class="mw-redirect" title="Botanist">botanist</a> whose research focused on <a href="/wiki/Plant_pathology" title="Plant pathology">plant pathology</a>. She is known for identifying the cause of <a href="/wiki/Citrus_canker" title="Citrus canker">citrus canker</a>, which was threatening crops in the <a href="/wiki/Deep_South" title="Deep South">Deep South</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Biography">Biography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Clara_H._Hasse&action=edit&section=1" title="Edit section: Biography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Hasse attended the University of Michigan. While at U of M, she was appointed an assistant in botany in 1902.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> 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.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> After graduating from the <a href="/wiki/University_of_Michigan" title="University of Michigan">University of Michigan</a> in 1903 with a PhB,<sup id="cite_ref-:0_3-0" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> she went to <a href="/wiki/Washington,_D.C." title="Washington, D.C.">Washington, D.C.</a>, to take up an appointment as assistant <a href="/wiki/Horticulturist" class="mw-redirect" title="Horticulturist">horticulturist</a> and botanist in the <a href="/wiki/Bureau_of_Plant_Industry_(United_States)" class="mw-redirect" title="Bureau of Plant Industry (United States)">Bureau of Plant Industry</a> at the <a href="/wiki/U.S._Department_of_Agriculture" class="mw-redirect" title="U.S. Department of Agriculture">U.S. Department of Agriculture</a> under <a href="/wiki/Erwin_Frink_Smith" title="Erwin Frink Smith">Erwin Frink Smith</a>, the USDA's pathologist-in-charge.<sup id="cite_ref-:0_3-1" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Hasse was one of the twenty assistants that Smith hired during his tenure at the USDA. She later worked at the <a href="/w/index.php?title=Florida_Agricultural_Experiment_Station&action=edit&redlink=1" class="new" title="Florida Agricultural Experiment Station (page does not exist)">Florida Agricultural Experiment Station</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Hasse died at her home in <a href="/wiki/Muskegon,_Michigan" title="Muskegon, Michigan">Muskegon</a>, Michigan, aged 46.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Research">Research</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Clara_H._Hasse&action=edit&section=2" title="Edit section: Research"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Her paper "<i><a href="/w/index.php?title=Pseudomonas_citri&action=edit&redlink=1" class="new" title="Pseudomonas citri (page does not exist)">Pseudomonas citri</a></i>, the cause of Citrus canker", published in the <i>Journal of Agricultural Research</i> in 1915, was the first to identify the cause of <a href="/wiki/Citrus_canker" title="Citrus canker">citrus canker</a>. While originally it was believed that citrus canker was of fungoid origin, Hasse found that bacteria are at its source.<sup id="cite_ref-Hasse_7-0" class="reference"><a href="#cite_note-Hasse-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Hasse isolated the bacteria, now known as <i><a href="/wiki/Xanthomonas" title="Xanthomonas">Xanthomonas</a> axonopodis</i> pv. <i>citri</i><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><i>.</i> Her work was included in Department of Agriculture bulletins to index the diseases of economic plants.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>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."<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Partial_bibliography">Partial bibliography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Clara_H._Hasse&action=edit&section=3" title="Edit section: Partial bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://naldc.nal.usda.gov/download/IND43965477/PDF#:~:text=The%20cells%20in%20the%20canker,conditions%20of%20temperature%20and%20moisture.&text=As%20a%20result%20the%20diseased,above%20the%20normal%20leaf%20surface.">"Pseudomonas citri, the cause of Citrus canker"</a>, <i>Journal of Agricultural Research</i>, vol. IV, no. 1, April 15, 1915, pp. 97-100</li></ul> <style data-mw-deduplicate="TemplateStyles:r1213917922">.mw-parser-output .botanist-bordered{border:0 solid #ddd;border-width:2px 0;padding:0.5em 0}.mw-parser-output .botanist .nickname{font-weight:bold}</style><div class="metadata botanist-bordered"><span class="botanist">The standard <a href="/wiki/List_of_botanists_by_author_abbreviation_(A)" title="List of botanists by author abbreviation (A)">author abbreviation</a> <span class="vcard"><span class="fn n"><span class="nickname">C.H.Hasse</span></span></span> is used to indicate this person as the author when <a href="/wiki/Author_citation_(botany)" title="Author citation (botany)">citing</a> a <a href="/wiki/Botanical_name" title="Botanical name">botanical name</a>.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></span></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Clara_H._Hasse&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFUniversity_of_Michigan._Board_of_Regents." class="citation web cs1">University of Michigan. Board of Regents. <a rel="nofollow" class="external text" href="https://quod.lib.umich.edu/u/umregproc/ACW7513.1901.001?rgn=main;view=fulltext">"Proceedings of the Board of Regents (1901-1906)"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Proceedings+of+the+Board+of+Regents+%281901-1906%29&rft.au=University+of+Michigan.+Board+of+Regents.&rft_id=https%3A%2F%2Fquod.lib.umich.edu%2Fu%2Fumregproc%2FACW7513.1901.001%3Frgn%3Dmain%3Bview%3Dfulltext&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMichigan2000" class="citation book cs1">Michigan, University of (2000). <a rel="nofollow" class="external text" href="http://name.umdl.umich.edu/AAS3302.0001.001"><i>The University of Michigan, an encyclopedic survey ... Wilfred B. Shaw, editor</i></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+University+of+Michigan%2C+an+encyclopedic+survey+...+Wilfred+B.+Shaw%2C+editor.&rft.date=2000&rft.aulast=Michigan&rft.aufirst=University+of&rft_id=http%3A%2F%2Fname.umdl.umich.edu%2FAAS3302.0001.001&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-:0-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRossiter1980" class="citation journal cs1">Rossiter, Margaret W. (September 1980). "<span class="cs1-kern-left"></span>"Women's Work" in Science, 1880-1910". <i>Isis</i>. <b>71</b> (3). The University of Chicago Press on behalf of The History of Science Society: 381–398. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1086%2F352540">10.1086/352540</a>. <a href="/wiki/JSTOR_(identifier)" class="mw-redirect" title="JSTOR (identifier)">JSTOR</a> <a rel="nofollow" class="external text" href="https://www.jstor.org/stable/230118">230118</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:143706974">143706974</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Isis&rft.atitle=%22Women%27s+Work%22+in+Science%2C+1880-1910&rft.volume=71&rft.issue=3&rft.pages=381-398&rft.date=1980-09&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A143706974%23id-name%3DS2CID&rft_id=https%3A%2F%2Fwww.jstor.org%2Fstable%2F230118%23id-name%3DJSTOR&rft_id=info%3Adoi%2F10.1086%2F352540&rft.aulast=Rossiter&rft.aufirst=Margaret+W.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMichigan1900" class="citation book cs1">Michigan, University of (1900-01-01). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=kec_AAAAYAAJ"><i>Calendar of the University of Michigan for ...</i></a> The University.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Calendar+of+the+University+of+Michigan+for+...&rft.pub=The+University&rft.date=1900-01-01&rft.aulast=Michigan&rft.aufirst=University+of&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dkec_AAAAYAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://siarchives.si.edu/collections/siris_arc_297438">"Clara H. Hasse (1880?-1926)"</a>. <i>Collection Record</i>. Smithsonian Institution Archives<span class="reference-accessdate">. Retrieved <span class="nowrap">30 March</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Collection+Record&rft.atitle=Clara+H.+Hasse+%281880%3F-1926%29&rft_id=http%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_arc_297438&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><i>The Michigan Alumnus</i> (1926), Volume 33, p. 284</span> </li> <li id="cite_note-Hasse-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-Hasse_7-0">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://archive.org/stream/journalofagricul04unit#page/n143/mode/2up">PSEUDOMONAS CITRI, THE CAUSE OF CITRUS CANKER (archive.org book reader)</a><a rel="nofollow" class="external text" href="https://archive.org/stream/journalofagricul04unit/journalofagricul04unit_djvu.txt">PSEUDOMONAS CITRI, THE CAUSE OF CITRUS CANKER (archive.org text version)</a>, Clara Hasse, Journal of Agricultural Research, 2015-10, Volume 4, p. 97.</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJordan1918" class="citation book cs1">Jordan, Edwin Oakes (1918). <i>A text-book of general bacteriology</i>. Philadelphia and London: W. B. Saunders company. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.5962%2Fbhl.title.68463">10.5962/bhl.title.68463</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=A+text-book+of+general+bacteriology&rft.place=Philadelphia+and+London&rft.pub=W.+B.+Saunders+company&rft.date=1918&rft_id=info%3Adoi%2F10.5962%2Fbhl.title.68463&rft.aulast=Jordan&rft.aufirst=Edwin+Oakes&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.apsnet.org/edcenter/disandpath/prokaryote/pdlessons/Pages/CitrusCanker.aspx">"Citrus canker"</a>. <i>Citrus canker</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2020-05-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Citrus+canker&rft.atitle=Citrus+canker&rft_id=https%3A%2F%2Fwww.apsnet.org%2Fedcenter%2Fdisandpath%2Fprokaryote%2Fpdlessons%2FPages%2FCitrusCanker.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKillough1926" class="citation journal cs1">Killough, Hugh Baxter (1926). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=5MlFAQAAIAAJ">"Department Bulletin No. 1366"</a>. <i>United States Department of Agriculture</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=United+States+Department+of+Agriculture&rft.atitle=Department+Bulletin+No.+1366&rft.date=1926&rft.aulast=Killough&rft.aufirst=Hugh+Baxter&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D5MlFAQAAIAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFThomas_Swann_Harding1947" class="citation book cs1">Thomas Swann Harding (1947). <a rel="nofollow" class="external text" href="https://archive.org/details/in.ernet.dli.2015.201994"><i>Two Blades Of Grass</i></a>. Norman University Of Oklahoma Press. p. <a rel="nofollow" class="external text" href="https://archive.org/details/in.ernet.dli.2015.201994/page/n375">324</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Two+Blades+Of+Grass&rft.pages=324&rft.pub=Norman+University+Of+Oklahoma+Press&rft.date=1947&rft.au=Thomas+Swann+Harding&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fin.ernet.dli.2015.201994&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFInternational_Plant_Names_Index" class="citation cs1"><a href="/wiki/International_Plant_Names_Index" title="International Plant Names Index">International Plant Names Index</a>. <a rel="nofollow" class="external text" href="http://www.ipni.org/ipni/advAuthorSearch.do?find_abbreviation=C.H.Hasse"><i> C.H.Hasse</i></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=+C.H.Hasse&rft.au=International+Plant+Names+Index&rft_id=http%3A%2F%2Fwww.ipni.org%2Fipni%2FadvAuthorSearch.do%3Ffind_abbreviation%3DC.H.Hasse&rfr_id=info%3Asid%2Fen.wikipedia.org%3AClara+H.+Hasse" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Clara_H._Hasse&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Hasse, Clara H. <a rel="nofollow" class="external text" href="https://naldc.nal.usda.gov/download/IND43965477/PDF">"Pseudomonas citri, the cause of Citrus canker"</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304093223/http://naldc.nal.usda.gov/download/IND43965477/PDF">Archived</a> 2016-03-04 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>. <i>Journal of Agricultural Research</i>, Vol. IV, No. I, 15 April 1915</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul 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