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United States Department of Agriculture

Agricultural Research Service

William F. Pfender (Bill)

Research Plant Pathologist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
The use and role of predictive systems in disease management - (Peer Reviewed Journal)
Gent, D.H., Mahaffee, W.F., Mcroberts, N., Pfender, W.F. 2013. The use and role of predictive systems in disease management. Annual Review of Phytopathology. 51:267-89.
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.
Pathotype-specific QTL for stem rust resistance in Lolium perenne - (Peer Reviewed Journal)
Pfender, W.F., Slabaugh, M. 2013. Pathotype-specific QTL for stem rust resistance in Lolium perenne. Theoretical and Applied Genetics. 126:1213-1225.
Effects of the mycoparasite Sphaerellopsis filum on overwintering survival of stem rust in perennial ryegrass - (Peer Reviewed Journal)
Gordon, T.C., Pfender, W.F. 2012. Effects of the mycoparasite Sphaerellopsis filum on overwintering survival of stem rust in perennial ryegrass. Plant Disease. 96:1471-1481.
Sensitivity of disease management decision aids to temperature input errors associated with out-of-canopy and reduced time-resolution measurements - (Peer Reviewed Journal)
Pfender, W.F., Gent, D.H., Mahaffee, W.F. 2012. Sensitivity of disease management decision aids to temperature input errors associated with out-of-canopy and reduced time-resolution measurements. Plant Disease. 96:726-736.
QTL for resistance in Lolium perenne to a mixed population of Puccinia graminis subsp. graminicola: use of RAD (restriction site associated DNA) markers to rapidly populate a new linkage map - (Peer Reviewed Journal)
Pfender, W.F., Saha, M.C., Johnson, E.A., Slabaugh, M.B. 2011. QTL for resistance in Lolium perenne to a mixed population of Puccinia graminis subsp. graminicola: use of RAD (restriction site associated DNA) markers to rapidly populate a new linkage map. Theoretical and Applied Genetics. 122:1467-1480.
Decision Aids for Multiple-Decision Disease Management as Affected by Weather Input Errors - (Peer Reviewed Journal)
Pfender, W.F., Gent, D.H., Mahaffee, W.F., Coop, L.B., Fox, A. 2011. Decision Aids for Multiple-Decision Disease Management as Affected by Weather Input Errors. Phytopathology. 101:644-653.
Forecast and virtual weather driven plant disease risk modeling system - (Abstract Only)
Coop, L., Fox, A., Mahaffee, W.F., Gent, D.H., Pfender, W.F., Thomas, C. 2009. Forecast and virtual weather driven plant disease risk modeling system. American Phytopathological Society Abstracts. p. 873.
Five year field evaluation summary of the USDA stem rust model for perennial ryegrass - (Experiment Station)
Pfender, W.F., Mellbye, M.E., Silberstein, T.B., Gingrich, G.A. Five year field evaluation summary of the USDA stem rust model for perennial ryegrass. Seed Production Research at Oregon State University. 2009. p. 26-28.
Field assessment of a model for fungicide effects on within-plant spread of stem rust in perennial ryegrass seed crops - (Peer Reviewed Journal)
Pfender, W.F., Eynard, J. 2009. Field assessment of a model for fungicide effects on within-plant spread of stem rust in perennial ryegrass seed crops. Phytopathology. 99:696-703.
A Damage Function for Stem Rust of Perennial Ryegrass Seed Crops - (Peer Reviewed Journal)
Pfender, W.F. 2009. A Damage Function for Stem Rust of Perennial Ryegrass Seed Crops. Phytopathology. 99:498-505.
Comparative Analysis of Multiple Disease Resistance in Ryegrass and Cereal Crops - (Peer Reviewed Journal)
Jo, Y., Barker, R.E., Pfender, W.F., Warnke, S.E., Sim, S., Jung, G. 2008. Comparative Analysis of Multiple Disease Resistance in Ryegrass and Cereal Crops. Theoretical and Applied Genetics. 117(4):531-543.
The Effect of Fungicide Applications on Seed Yield in Perennial Ryegrass, and Evaluation of the Rust Model Decision Aid - (Experiment Station)
Mellbye, M.E., Silberstein, T.B., Gingrich, G.A., Pfender, W.F. 2008. The Effect of Fungicide Applications on Seed Yield in Perennial Ryegrass, and Evaluation of the Rust Model Decision Aid. Seed Production Research at Oregon State University. 127:46-48.
Emission rates, survival and modeled dispersal of viable pollen of creeping bentgrass - (Peer Reviewed Journal)
Pfender, W.F., Graw, R., Bradley, W., Carney, M., Maxwell, L. 2007. Emission rates, survival and modeled dispersal of viable pollen of creeping bentgrass. Crop Science.47:2529-2539.
The Effect of Fungicide Applications on Seed Yield in Perennial Ryegrass, and Evaluation of the Rust Model Decision Aid - (Experiment Station)
Mellbye, M.E., Silberstein, G.A., Gingrich, G.A., Pfender, W.F. 2007. The Effect of Fungicide Applications on Seed Yield in Perennial Ryegrass, and Evaluation of the Rust Model Decision Aid. Seed Production Research at Oregon State University. Department of Crop & Soil Science. Ext/CrS P 47-49.
Use of a complex air pollution model to estimate dispersal and deposition of grass stem rust urediniospores at landscape level - (Peer Reviewed Journal)
Pfender, W.F., Graw, R., Bradley, W., Carney, M., Maxwell, L. 2006. Use of a complex air pollution model to estimate dispersal and deposition of grass stem rust urediniospores at landscape level. Agricultural and Forest Meteorology.139:138-153.
Interaction of Fungicide Physical Modes of Action and Plant Phenology in Control of Stem Rust of Perennial Ryegrass Grown for Seed - (Peer Reviewed Journal)
Pfender, W.F. 2006. Interaction of fungicide physical modes of action and plant phenology in control of stem rust of perennial ryegrass grown for seed. Plant Disease.90:1225-1232.
Field Evaluation of the USDA Rust Model – Year II - (Experiment Station)
Gingrich, G.A., Mellbye, M.E., Pfender, W.F. 2006. Field evaluation of the USDA rust model – year II. Seed Production Research at Oregon State University. EXT CrS, 4/06 P 27-30.
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
Importance of Plant Phenology to Temporal Scale in Epidemics of Ryegrass Stem Rust - (Proceedings)
Pfender, W.F. 2005. Importance of plant phenology to temporal scale in epidemics of ryegrass stem rust. Plant Disease Epidemiology International Workshop Proceedings. p.61.
Effect of Autumn Planting Date and Stand Age on Severity of Stem Rust in Seed Crops of Perennial Ryegrass - (Peer Reviewed Journal)
Pfender, W.F. 2004. Effect of autumn planting date and stand age on severity of stem rust in seed crops of perennial ryegrass. Plant Disease.2004. v. 88. p. 1017-1020.
New Applications of Statistical Tools in Plant Pathology - (Peer Reviewed Journal)
Garrett, K.A., Madden, L.V., Hughes, G., Pfender, W.F. 2004. New applications of statistical tools in plant pathology. Phytopathology.v 94. p.999-1003.
Role of Phenology in Host Susceptibility and Within-Plant Spread of Stem Rust During Reproductive Development of Perennial Ryegrass - (Peer Reviewed Journal)
Pfender, W.F. Role of phenology in host susceptibility and within-plant spread of stem rust during reproductive development of perennial ryegrass. Phytopathology.2004.94:308-316.
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.
Prediction of Stem Rust Infection Favorability, by Means of Degree-Hour Wetness Duration, for Perennial Ryegrass Seed Crops - (Peer Reviewed Journal)
Pfender, W.F. Prediction of Stem Rust Infection Favorability, by Means of Degree-Hour Wetness Duration, for Perennial Ryegrass Seed Crops. Phytopathology. v. 93. p. 467-477.
Selection for Stem Rust Resistance in Tall Fescue and Its Correlated Response with Seed Yield - (Peer Reviewed Journal)
BARKER, R.E., PFENDER, W.F., WELTY, R.E. SELECTION FOR STEM RUST RESISTANCE IN TALL FESCUE AND ITS CORRELATED RESPONSE WITH SEED YIELD. CROP SCIENCE. 2003. v. 43(1). p.75-79.
Host Range Differences Between Populations of Puccinia Graminis Subsp. Graminicola Obtained from Perennial Ryegrass and Tall Fescue - (Peer Reviewed Journal) - (05-Jun-01)
Prediction of Stem Rust Infection Severity in Perennial Ryegrass, Based on Overnight and Post-Sunrise Degree-Hours of Moisture Duration - (Abstract Only)
PFENDER, W.F. PREDICTION OF STEM RUST INFECTION SEVERITY IN PERENNIAL RYEGRASS, BASED ON OVERNIGHT AND POST-SUNRISE DEGREE-HOURS OF MOISTURE DURATION. PHYTOPATHOLOGY. 2001. v. 91. p. S72.
A Temperature-Based Model for Latent Period Duration in Stem Rust of Perennial Ryegrass and Tall Fescue - (Peer Reviewed Journal) - (16-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)
Freezing Temperature Effect on Survival of Puccinia Graminis Subsp. Graminicola in Plants of Festuca Arundinacea and Lolium Perenne - (Peer Reviewed Journal) - (12-Feb-99)
Comparison of Fungicides and Initial Spray Dates in Control of Stem Rust Onperennial Ryegrass Grown for Seed - (Peer Reviewed Journal) - (10-Feb-98)
Last Modified: 3/31/2011
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