Page Banner

United States Department of Agriculture

Agricultural Research Service

Stephen C. Alderman

Research Plant Pathologist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Using microbial community interactions within plant microbiomes to advance an evergreen agricultural revolution - (Book / Chapter) - (25-Jul-13)
Infection of Brachypodium distachyon by formae speciales of Puccinia graminis: early infection events and host-pathogen incompatibility - (Peer Reviewed Journal)
Figueroa, M., Alderman, S.C., Garvin, D.F., Pfender, W.F. 2013. Infection of Brachypodium distachyon by formae speciales of Puccinia graminis: early infection events and host-pathogen incompatibility. PLoS One. 8(2):e56857.
Identification of Anguina funesta from annual ryegrass (Lolium multiflorum) seed lots in Oregon - (Peer Reviewed Journal)
Meng, S., Alderman, S.C., Fraley, C., Ludy, R., Sun, F., Osterbauer, N. 2012. Identification of Anguina funesta from annual ryegrass (Lolium multiflorum) seed lots in Oregon. Plant Health Progress. 10:1094.
Survival, germination, and growth of Epichloe typhina and significance of leaf wounds and insects in infection of orchardgrass - (Peer Reviewed Journal)
Alderman, S.C. 2013. Survival, germination, and growth of Epichloe typhina and significance of leaf wounds and insects in infection of orchardgrass. Plant Disease. 97(3):323-328.
Fertilization of Epichloe typhina in cultivated Dactylis glomerata by factors besides Botanophila flies - (Proceedings)
Rao, S., Alderman, S.C., Kaser, J., Hoffman, G. 2012. Fertilization of Epichloe typhina in cultivated Dactylis glomerata by factors besides Botanophila flies. Proceedings of the International Symposium on Fungal Endophytes of Grasses. 122-126.
Occurrence and trends in weed seed contaminants in fine fescue seed lots in Oregon - (Peer Reviewed Journal)
Alderman, S.C., Elias, S.G., Hulting, A.G. 2011. Occurrence and trends in weed seed contaminants in fine fescue seed lots in Oregon. Seed Technology Journal. 33:7-21.
Transformation of Epichloë typhina by electroporation of conidia - (Peer Reviewed Journal)
Dombrowski, J.E., Baldwin, J.C., Alderman, S.C., Martin, R.C. 2011. Transformation of Epichloë typhina by electroporation of conidia. BMC Research Notes. 4:46.
Timing of occurrence of Claviceps purpruea ascospores in northeast Oregon - (Peer Reviewed Journal)
Alderman, S.C., Walenta, D.L., Hamm, P.B. 2010. Timing of occurrence of Claviceps purpruea ascospores in northeast Oregon. Plant Health Progress. doi:10.1094/PHP-2010-1123-01-RS.
Potential control of choke in orchardgrass with the fungus Dicyma pulvinata - (Experiment Station)
Alderman, S.C., Rao, S., Martin, R.C. 2010. Potential control of choke in orchardgrass with the fungus Dicyma pulvinata. Seed Production Research at Oregon State University. 129:6-8.
First report of Dicyma pulvinata on Epichloë typhina and its potential for E. typhina control - (Peer Reviewed Journal)
Alderman, S.C., Rao, S., Martin, R.C. 2010. First report of Dicyma pulvinata on Epichloë typhina and its potential for E. typhina control. Plant Health Progress. doi:10.1094/PHP-2010-0216-01-RS.
Summary of choke control studies-2008 - (Experiment Station)
Alderman, S.C., Rao, S., Spinney, R.L., Boren, P.K., Cacka, J.F. Summary of choke control studies-2008. Seed Production Research at Oregon State University. 2009. p. 19-25.
Seasonal production of infective ascospores of the choke pathogen, Epichloe typhina, in orchardgrass in the Willamette Valley - (Experiment Station)
Kaser, J.M., Rao, S., Alderman, S.C. Seasonal production of infective ascospores of the choke pathogen, Epichloe typhina, in orchardgrass in the Willamette Valley. Seed Production Research at Oregon State University. 2009. p. 11-15.
Monitoring of ergot (Claviceps purpurea) ascospore release to better time fungicide application in NE Oregon grass seed production - (Experiment Station)
Walenta, D.L., Hamm, P.B., Alderman, S.C. Monitoring of ergot (Claviceps purpurea) ascospore release to better time fungicide application in NE Oregon grass seed production. Seed Production Research at Oregon State University. 2009. p. 34-38.
Choke in orchardgrass: research update and potential control - (Experiment Station)
Alderman, S.C., Rao, S. 2008. Choke in orchardgrass: research update and potential control. Seed Production Research at Oregon State University. 127:22-23.
Ascosporic fertilization of Epichloe typhina in Dactylis glomerata seed production fields in Oregon and implications for choke management Reprint Icon - (Peer Reviewed Journal)
Alderman, S.C., Rao, S. 2008. Ascosporic fertilization of Epichloe typhina in Dactylis glomerata seed production fields in Oregon and implications for choke management. Plant Health Progress.doi:10.1094/PHP-2008-0421-01-BR
Tilletia vankyi, a new species of reticulate-spored bunt fungus with non-conjugating basidiospores infecting species of Festuca and Lolium - (Peer Reviewed Journal)
Carris, L.M., Castlebury, L.A., Huang, G., Alderman, S.C., Luo, J., Bao, X. 2007. Tilletia vankyi, a new species of reticulate-spored bunt fungus with non-conjugating basidiospores infecting species of Festuca and Lolium. Mycological Research. 111:1386-1398.
Occurrence of Ustilago striiformis in Dactylis glomerata seed production fields in Oregon - (Peer Reviewed Journal)
Alderman, S.C., Ocamb, C.M., Mellbye, M.E., Sedegui, M.S. 2007. Occurrence of Ustilago striiformis in Dactylis glomerata seed production fields in Oregon. Plant Health Progress.10.1094/PHP-2007-1023-01-RS.
Update on occurrence of stripe smut and bunt in grasses grown for seed - (Experiment Station)
Alderman, S.C., Ocamb, C.M., Mellbye, M.E., Sedegui, S.M. 2007. Update on occurrence of stripe smut and bunt in grasses grown for seed. Seed Production Research at Oregon State University. Department of Crop & Soil Science Ext/CrS P 50.
Occurrence of a Tilletia Sp. in Chewings Fescue Fields in Oregon - (Experiment Station)
Alderman, S.C., Carris, L.M. 2006. Occurrence of a tilletia sp. in chewings fescue fields in Oregon. Seed Production Research at Oregon State University. EXT/CrS 125, 4/06 P. 31.
Regional Development of Orchardgrass Choke Disease and Estimation of Seed Yield Loss - (Peer Reviewed Journal)
Pfender, W.F., Alderman, S.C. 2006. Regional development of orchardgrass choke disease and estimation of seed yield loss. Plant Disease.90:240-244.
Diseases and Other Difficulties in Seed Production - (Monograph)
Alderman, S.C., Pfender, W.F., Ocamb, C. 2005. Diseases and other difficulties in seed production. Tall Fescue Information System.Tall Fescue On-Line Monograph:Article#11. Available: http://forages.oregonstate.eud/is/tfis/monograph.html
Quantitative Assessment of Anguina Sp. and Rathayibacter Rathayi in Orchardgrass Seed Production Fields in Oregon and Estimates of Yield Loss - (Peer Reviewed Journal) - (15-Jul-05)
Transformation of Epichloe Typhina by Electroporation of Conidia - (Abstract Only)
Dombrowski, J.E., Baldwin, J.C., Alderman, S.C. 2005. Transformation of epichloe typhina by electroporation of conidia. In: Plant Biology Annual Meeting.July 16-20, 2005, Seattle, WA. Abstract # 1094.
Pcr-Based Assays for the Detection of Endophytic Fungi in Grasses - (Abstract Only)
Baldwin, J.C., Dombrowski, J.E., Azevedo, M.D., Alderman, S.C., Banowetz, G.M. 2005. PCR-based assays for the detection of endophytic fungi in grasses. IN: Plant Biology Annual Meeting, July 16-20, 2005 in Seattle, WA. Abstract #1093.
The Botanophila-Epichloë Association in Cultivated Festuca in Oregon: Evidence of Simple Fungivory - (Peer Reviewed Journal)
Rao, S., Alderman, S.C., Takeyasu, J. 2005. The botanophila-epichloë association in cultivated festuca in oregon: evidence of simple fungivory. Entomologia Experimentalis et Applicata. v. 115. p. 427-433.
Yield Loss Estimates Associated with Panicle Diseases of Orchardgrass - (Experiment Station)
Alderman, S.C., Ocamb, C. 2005. Yield loss estimates associated with panicle diseases of orchardgrass. Seed Production Research at Oregon State University. p. 123.
Occurrence of Stripe Smut in Grass Seed Production Fields in the Willamette Valley During 2004 - (Experiment Station)
Alderman, S.C., Ocamb, C.M., Mellbye, M., Gingrich, G., Sedegui, S. 2005. Occurrence of stripe smut in grass seed production fields in the willamette valley during 2004. Seed Production Research at Oregon State University.
Impact on Seed Yield of New Thrips Pest in Bentgrass Seed Production Fields in the Willamette Valley - (Experiment Station)
Rao, S., Alderman, S.C. 2005. : impact on seed yield of new thrips pest in bentgrass seed production fields in the willamette valley. Seed Production Research at Oregon State University.
A DNA Assay for the Detection of Choke in Orchardgrass - (Experiment Station)
Baldwin, J.C., Dombrowski, J.E., Alderman, S.C. 2005. A DNA assay for the detection of choke in orchardgrass. Seed Production Research at Oregon State University. p. 19-20.
Identification of Rathayibacter Rathayi in Oregon and Maryland - (Abstract Only)
Postnikova, E., Agarkova, I., Riley, I.T., Alderman, S.C., Ocamb, C.M., Vidaver, A.K., Schaad, N.W. 2004. Identification of rathayibacter rathayi in oregon and maryland. Phytopathology Supplement; APSnet (Plant Pathology Online). v. 94(Supplement)S85.
Fusarium Species Associated with Tall Fescue Seed Production in Oregon - (Peer Reviewed Journal)
Ocamb, C.M., Alderman, S.C. 2004. Fusarium species associated with tall fescue seed production in oregon. Plant Health Progress. doi:10.1094/PHP-2004-0319-01-RS.
A Reevaluation of the Host Range and Geographical Distribution of Claviceps Species in the United States - (Peer Reviewed Journal)
Alderman, S.C., Halse, R.R., White, J.F. 2004. A reevaluation of the host range and geographical distribution of claviceps species in the united states. Plant Disease.88:63-81.
Evaluation of Resistance to Claviceps Purpurea in Kentucky Bluegrass Based on Incidence and Severity Estimates - (Peer Reviewed Journal)
Alderman, S.C., Barker, R.E. 2003. Evaluation of resistance to claviceps purpurea in kentucky bluegrass based on incidence and severity estimates. Plant Disease.87:1043-1047.
Red Clover Seed Production: Vi. Effect and Economics of Soil Ph Adjusted by Lime Application - (Peer Reviewed Journal)
STEINER, J.J., ALDERMAN, S.C. RED CLOVER SEED PRODUCTION: VI. EFFECT AND ECONOMICS OF SOIL PH ADJUSTED BY LIME APPLICATION. CROP SCIENCE. 2003. v. 43(2). p. 624-630.
Evaluation of Post-Harvest Burning Or Fungicides to Reduce Polyetic Epidemic Rate in Orchardgrass Choke Disease - (Peer Reviewed Journal)
PFENDER, W.F., ALDERMAN, S.C. EVALUATION OF POST-HARVEST BURNING OR FUNGICIDES TO REDUCE POLYETIC EPIDEMIC RATE IN ORCHARDGRASS CHOKE DISEASE. PLANT DISEASE. 2002. v.87. p. 375-379.
Use of a Seed Scarifier for Detection and Enumeration of Galls of Anguina and Rathayibacter Species in Orchard Grass Seed - (Peer Reviewed Journal)
ALDERMAN, S.C., BILSLAND, D.M., GRIESBACH, J.A., MILBRATH, G.M., SCHAAD, N.W., POSTNIKOVA, E. USE OF A SEED SCARIFIER FOR DETECTION AND ENUMERATION OF GALLS OF ANGUINA AND RATHAYIBACTER SPECIES IN ORCHARD GRASS SEED. PLANT DISEASE. 2003. v.87. p. 375-379.
Insects and Ergot in Kentucky Bluegrass Seed Production Fields in the Pacific Northwest - (Experiment Station) - (30-Sep-02)
Association of Insects and Ergot (Claviceps Purpurea) in Kentucky Bluegrassseed Production Fields - (Peer Reviewed Journal) - (31-Dec-01)
Neoclaviceps Monostipa: Features of An Enigmatic Clavicipitalean Fungus and the Phyletic Status of the Anamorphic Genus Ephelis - (Peer Reviewed Journal) - (28-Jul-00)
Integrated Pest Management of Diseases of Grasses Grown for Seed in Oregon - (Proceedings) - (30-Sep-99)
Geographical Distribution and Incidence of Orchardgrass Choke, Caused by Epichloe Typhina, in Oregon - (Peer Reviewed Journal) - (05-May-99)
Red Clover Seed Production: V. Root Health and Crop Productivity - (Peer Reviewed Journal) - (18-Feb-99)
Recent Occurrence and Potential Development of Blind Seed Disease in Oregon - (Peer Reviewed Journal) - (09-Oct-98)
Occurrence, Distribution and Impact of Ergot in Production of Kentucky Bluegrass Seed in Central Oregon - (Peer Reviewed Journal) - (16-Jul-97)
Red Clover Seed Production:iv. Root Rot Resistance under Forage and Seed Production Systems - (Peer Reviewed Journal) - (19-Nov-96)
Impace of Ergot on Kentucky Bluegrass Grown for Seed in Eastern Oregon - (Peer Reviewed Journal) - (20-Mar-96)
Italian Ryegrass and N Source Fertilization in Western Oregon in Two Contrasting Climatic Years. I. Growth and Seed Yield. - (Peer Reviewed Journal) - (15-Feb-96)
Italian Ryegrass and N Source Fertilization in Western Oregon in Two Contrasting Climatic Years. Ii. Plant N Accumulation and Soil N Status - (Peer Reviewed Journal) - (15-Feb-96)
A Reevaluation of Gloeotinia Temulenta and G. Granigena - (Peer Reviewed Journal) - (04-Jan-96)
Effect of Red Clover Cultivar Root Rot Resistance on Forage and Seed Production Systems - (Experiment Station) - (05-Dec-95)
Occurrence of Gloeotinia Temulenta on Tall Fescue in Oregon - (Peer Reviewed Journal) - (10-Nov-95)
Survival of Weed Seeds and Seed Pathogen Propagules in Composted Grass Seedstraw - (Peer Reviewed Journal) - (18-Aug-95)
Red Clover Cultivar Variability for Root Rot Resistance under Forage and Seed - (Abstract Only) - (26-Jun-95)
Last Modified: 4/18/2007
Footer Content Back to Top of Page