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William Pfender
Professor (Courtesy) PhD 1981, University of Wisconsin-Madison Office/Lab: USDA Forage Seed and Cereal Research Unit |
Integrated management for foliar diseases of grass grown for seed, with emphasis on host resistance and microbial ecology.
With a legislatively-mandated reduction in straw burning, the grass seed growers of the Pacific Northwest must develop new, sustainable cropping practices that incorporate alternative residue management practices. Our research will focus on management of foliar and root diseases in the grass seed crop and rotation crops that is consistent with profitable production and long term protection of the agricultural and natural resource. Current areas of concentration include stem rust management through a better understanding of host resistance and pathogen variability, rust forecasting for more efficient fungicide use , and investigation of leafspot diseases in several grass species grown under non-burn conditions.
Cindy Lipp
USDA-National Forage Seed Production Research Center
Pfender, W.F., V.P. Fieland, L.M. Ganio,and R.J.Seidler. 1996. Microbial community structure and activity in wheat straw after inoculation with biological control organisms. Appl. Soil. Ecol. 3:69-78
Pfender, W.F. 1996. Use of bioremediation bacteria to protect plants in pentachlorophenol-contaminated soil. J. Environ. Quality 25:1256-1260
Rodriguez, F. and W. F. Pfender. 1997 Antibiosis and antagonism of Sclerotinia homoeocarpa and Drechslera poae by Pseudomonas florescens Pf-5 in vitro and in planta. Phytopathology (in press)
S.C. Alderman, W.F. Pfender, R.E. Welty, M.E. Mellbye, R.L. Cook, J.W. Spatafora, and M. Putnam. 1997. First report of choke, caused by Epichloe typhina, on orchardgrass in Oregon. Plant Disease, 81: 1335.
W. Pfender and S. Vollmer.1999. Freezing temperature effect on survival of Puccinia graminis subsp. graminicola in Festuca arundinacea and Lolium perenne.Plant Disease: In Press
W. Pfender and S. Alderman. 1999. Geographical distribution and incidence of orchardgrass choke, caused by Epichloe typhina, in Oregon. Plant Disease: In Press.
Pfender, W. F. 2001. A temperature-based model for latent period duration in stem rust of perennial ryegrass and tall fescue. Phytopathology 91:111-116.
Pfender, W. 2001. Host range differences between populations of Puccinia graminis subsp. graminicola obtained from perennial ryegrass and tall fescue. Plant Disease 85:993-998.
Pfender,W. F. and Alderman, S. C. 2003. Evaluation of post-harvest burning and fungicides to reduce the polyetic rate of increase of choke disease in orchardgrass seed production. Plant Disease 87:375-379.
Pfender, W. F. 2003. Prediction of stem rust infection favorability, by means of degree-hour wetness duration, for perennial ryegrass seed crops. Phytopathology 93:467-477.
Pfender, W. 2004. Role of phenology in host susceptibility and within-plant spread of stem rust during reproductive development of perennial ryegrass. Phytopathology 94:308-316.
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 88:1017-1020.
Garrett, K. A., Madden, L. V., Hughes, G., and Pfender, W. 2004. New applications of statistical tools in plant pathology. Phytopathology 94:999-1003.
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.
Pfender, W. F. and Alderman, S. C. 2006. Regional development of orchardgrass choke disease and estimation of seed yield loss. Plant Disease 90:240-244.
Pfender, W. Graw, R., Bradley, W., Carney, M., and Maxwell, L. 2006. Use of a complex air pollution model to estimate dispersal and deposition of grass stem rust urediniospores at landscape scale. Agricultural and Forest Meteorology 139:138-153.
Jo, Y., Barker, R., Sim, S., Jung, G., and Pfender, W. Comparative analysis of pathogen-specific quantitative disease resistance genes in ryegrass with cereal crops. Submitted to Molecular Breeding.
Pfender, W. Graw, R., Bradley, W., Carney, M., and Maxwell, L. Emission rates, survival and modeled dispersal of viable pollen of Agrostis stolonifera. Submitted to Crop Science.
