Department of Botany and Plant Pathology

Melodie Putnam Senior Instructor, M.S., Wisconsin-Madison, 1984. putnamm@science.oregonstate.edu   Office/Lab: Cordley 1076/1089 Phone: 541-737-5542/3472

Research and Extension Area

Diagnosis of diseases and disorders of plants submitted to the OSU Plant Clinic; chemical and non-chemical control recommendations.

Description of Research

Diagnostic techniques, etiology of new diseases. We have on-going research projects looking at detection, epidemiology, and management of disease of ornamentals due to Rhodococcus fascians.

Publications

Kraus, J., Tzanetakis, I.E., Putnam, M.L. , and Martin, R.R. 2008. Complete nucleotide sequence of an isolate of coleus vein necrosis virus from verbena. Archives of Virology 153:381-384.

Jordan , R.L., Guaragna, M.A., Van Buren, T., and Putnam, M.L . 2008. First Report of a New Potyvirus, Tricyrtis virus Y , and Lily virus X Potexvirus, in Tricyrtis formosana in the United States . Plant Disease 92:648.

Jordan , R.L., Guaragna, M.A., and Putnam, M. 2008. Detection and Molecular Characterization of New and Emerging Potyviruses of Ornamental Plants. Acta Horticulturae (in press).

Depuydt, S., Putnam, M ., Hosters, M., and Vereecke, D. 2008. Rhodococcus fascians , an Emerging Threat for Ornamental Crops. In: Floriculture, Ornamental and Plant Biotechnology: Advances and Topical Issues, Vol V.  Global Science Books.

Putnam, M.L . and Miller, M.L. 2007. Rhodococcus fascians in herbaceous perennials. Plant Disease 91:1064-1076.

Putnam, M.L ., and Glawe, D.A. 2007. New North American records of anamorphic powdery mildew fungi (Erisiphales) parasitizing species of Leucothoë and Limnanthes. Pacific Northwest Fungi 2:1-6.

Guaragna, M.A., Jordan, R. and Putnam, M.L . 2006. First molecular evidence of the occurrence of a pea mosaic strain of Bean yellow mosaic virus in Verbena x hybrida. Acta Hort (ISHS) 722:305-312.

Putnam, M.L. and Miller, M. 2006. Is it crown gall or leafy gall?  Digger, 50:39-46.

Angeles, G., Adams , G.C., and M.L. Putnam . 2006. Effect of Neofabraea alba on bark and wood anatomy of Fraxinus spp. IAWA Journal 27:409-418.

Putnam, M.L. and G.C. Adams 2005. Phlyctema vagabunda causes coin canker of ash ( Fraxinus spp.) in North America . Plant Dis. 89:773

Putnam, M.L. 2005 . Allantophomopsis lycopodina - a new aerial pathogen of Lingonberry ( Vaccinium vitis-idaea ) Plant Pathology 54:258.

Putnam, M.L . 2004. First report of stem rot of rosemary caused by Sclerotinia sclerotiorum in the United States . Plant Pathology 53:252.

Guaragna, M.A., R.L. Jordan, and M.L. Putnam. 2004. First report of Bean yellow mosaic virus (Pea mosaic strain) in Verbena x hybrida. Plant Disease 88:574.

Glawe, D.A., J.R. Glass, and M.L. Putnam. 2004. First report of white rust of Lunaria annua caused by Albugo candida in North America. Plant Health Progress. Doi:10.1094?PHP-2004-0317-01-HN.

Rossman, A.Y., L.A. Castlebury, and M.L. Putnam. 2004. First report of ash anthracnose caused by Discula fraxinea in Oregon. Plant Disease 88:222.

Bronson, J.J., G.R. Stanosz, and M.L. Putnam. 2003. First report of Sirococcus conigenus on deodar cedar in Oregon. Plant Disease 87:1006

Putnam, M.L., and L. J. du Toit. 2003. First report of Alternaria blight caused by Alternaria panax on Ginseng (Panax quinquefolius L) in Oregon and Washington, USA. Plant Pathology 52:406.

David F. Farr, D. F. , L. A. Castlebury, A. Y. Rossman, and M. L. Putnam. (2002) A new species of Phomopsis causing twig dieback of Vaccinium vitis-idaea (lingonberry). Mycological Research 106:745-752.

Rossman, A.Y., L. A. Castlebury, G. C. Adams, and M. L. Putnam. (2002) Phlyctema vagabunda isolated from coin canker of ash trees in Michigan. Plant Disease 86:442.

Griesbach, J.A., M. Putnam, and D. Driesner. First Report of Garlic Rust Caused by Puccinia allii in Oregon. (2001) Plant Disease 85:919

Putnam, M.L. 2000. Leaf blight and stem dieback of St. John’s-wort caused by Diploceras
hypericinum in Oregon: First US report. Plant Disease 84:1250.

Stone, J.K., M.L. Putnam, and L.E. Petrini. 2000. First report of Anthostomella pedemontana from North America. Mycotaxon LXXIV:505-506.

Putnam, M.L. 1999. Bacterial blight, a new disease of Lobelia ricardii caused by Pseudomonas cichorii. Plant Disease 83:966.

Putnam, M.L. 1999. Chlorotic spotting on cherry leaves: possible causes. Crop Protection 18:589-594.

Putnam, M.L and F. Crowe. 1999. Verticillium dahliae, a cause of wilt in Echinacea purpurea. Plant Disease 83:877.

Putnam, M.L. 1999. A new foliar blight of Douglas-fir, grand fir, and noble fir caused by a binucleate Rhizoctonia-like fungus. Plant Disease 83:200.

Putnam, M.L. 1998. Pseudomonas syringae leaf blight, a new disease of Kalmia latifolia. Plant Disease 82:1171.

Reddick, B.B., M.L. Putnam, and L.F. Habera. 1997. Natural infection of field-grown daikon radish (Raphanus sativus L.) crops by turnip crinkle virus in North America. J. Phytopathology 145:379-381.