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BOTANY AND PLANT PATHOLOGY •. EXTENSION PLANT PATHOLOGY <br /> . re <br /> OREGON STATE UNIVERSITY <br /> , 1089 Cordley Hall • Corvallis, Oregon 97331 -2903 <br /> Telephone 541•737•3472 ' <br /> Fax 541•737•2412 <br /> Plant Clinic Diagnostic Service <br /> Date: 08/14/98 <br /> Plant clinic number: 98 -630 <br /> Client: Jeff Andersen, City of Eugene, Public <br /> Works Urban Forestry <br /> 1820 Roosevelt <br /> Eugene, OR 97104 <br /> Submitter: Ross Penhallegon <br /> Lane County Extension <br /> 950 W 13th Ave <br /> Eugene, OR 97402 -3999 <br /> Host: American elm <br /> DIAGNOSIS: <br /> Common name: Dutch Elm Disease <br /> Scientific name: Ophiostoma <br /> Confidence: Confirmed <br /> Notes: This sample had, as you noted on the sample form, typical DED symptoms: <br /> brown streaking in the wood. <br /> Isolations from these areas yielded the DED fungus. I'm sure you know what action <br /> needs to be taken. It is important to break any root grafts prior to taking down the tree. <br /> Call me if you have any questions. <br /> Melodie Putnam <br /> Diagnostic Plant Pathologist <br /> Agriculture, Home Economics, 4 -H Youth, Forestry, Community Develop - <br /> ment, Energy, and Extension Sea Grant Programs, Oregon State University, <br /> L ;United States Department of Agriculture, and Marion county cooperating. <br /> !The Extension Service offers its programs and materials equally to all people. <br />