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Publications

2017

Nelson, A., S. Savary, L. Willocquet, S.J. Petrybridge, A. Mila, P. Esker, and N. McRoberts. 2017. Crop pests: Crop-health survey aims to fill data gaps. Nature 541:464 (Correspondence, doi:10.1038/541464a).

2016

Mallowa, S.O., E.J. Braun, A.E. Robertson, and P.D. Esker. 2016. Fungicides on our field corn - A case study on foliar fungicide use decisions in the US Corn Belt. The Plant Health Instructor DOI: 10.1094/PHI-T-2016-0607-01.

Esker, P. 2016. Anthracnose stalk rot, Section 6.1 in: A Farmer’s Guide to Corn Diseases, K. Wise, D. Mueller, A. Sisson, D. Smith, C. Bradley and A. Robertson (eds). APS Press, St. Paul, MN.

Esker, P. 2016. Anthracnose leaf blight, Section 4.1 in: A Farmer’s Guide to Corn Diseases, K. Wise, D. Mueller, A. Sisson, D. Smith, C. Bradley and A. Robertson (eds). APS Press, St. Paul, MN.

Garrett, K.A., M. Nita, E.D. DeWolf, P.D. Esker, L. Gomez-Montano, and A.H. Sparks. 2016. Plant pathogens as indicators of climate change. pages 325-338 in: Climate Change: Observed Impacts on Planet Earth, 2nd Ed. T.M. Letcher (ed). Elsevier, Amsterdam.

2015

Madden, L.V., D.A. Shah, and P.D. Esker. 2015. Does the P value have a future in plant pathology? Phytopathology 105:1400-1407.

Willyerd, K., C. Bradley, V. Chapra, S. Conley, P. Esker, L. Madden, K. Wise, and P. Paul. 2015. Revisiting fungicide-based management guidelines for leaf blotch diseases in soft red winter wheat. Plant Disease 99:1434-1444.

Mallowa, S.O., P.D. Esker, P. Paul, C. Bradley, S. Conley, and A. Robertson. 2015. Effect of maize hybrid and foliar fungicides on yield under low foliar disease severity conditions. Phytopathology 105:1080-1089.

Marburger, D., S. Conley, P. Esker, J. Lauer, and J.-M. Ané. 2015. Yield response to crop/genotype rotations and fungicide use to manage Fusarium-related diseases. Crop Science 55:889-898.

Murillo-Williams, A., P. Esker, T. Allen, C. Stone, and R. Frederick. 2015. First report of Phakopsora pachyrhizi causing soybean rust in Costa Rica. Plant Disease 99:418.

Kandel, Y.R., C.A. Bradley, K.A. Wise, M.I. Chilvers, A.U. Tenuta, V.M Davis, P.D. Esker, D.L. Smith, M.A. Licht, and D.S. Mueller. 2015. Effect of glyphosate on sudden death syndrome of soybean under different field conditions. Plant Disease 99:347-354.

Marburger, D., V. Muthusubramanian, S. Conley, P. Esker, J. Lauer, and J.-M. Ané. 2015. Crop rotation and management effect on Fusarium graminearum, F. oxysporum, and F. virguliforme populations. Crop Science 55:1-12.

2014

Weidenbenner, N.H., S.C. Rowntree, E.W. Wilson, J.J. Suhre, S.P. Conley, S.N. Casteel, V.M. Davis, B.W. Diers, P.D. Esker, J.E. Specht, and S.L. Naeve. 2014. Fungicide management does not affect the rate of genetic gain in soybean. Agronomy Journal 106:2043-2054.

Matamoros Castillo, R., A. Brenes Angulo, P. Esker, and L. Gómez Alpizar. 2014. Evaluación agronómica de trece genotipos de camote (Ipomoea batatas). Agronomía Costarricense 38:67-81.

Suhre, J.J., N.H. Weidenbenner, S.C. Rowntree, E.W. Wilson, S.L. Naeve, S.P. Conley, S.N. Casteel, B.W. Diers, P.D. Esker, J.E. Specht, and V.M. Davis. 2014. Soybean yield partitioning changes revealed by genetic gain and seeding rate interactions. Agronomy Journal 104:1631-1642.

Sikora et al. (53 authors). 2014. A coordinated effort to manage soybean rust in North America: a success story in soybean disease monitoring. Plant Disease 98:864-875.

Mourtzinis, S., S.C. Rowntree, J.J. Suhre, N.H. Weidenbenner, E.W. Wilson, V.M. Davis, S.L. Naeve, S.N. Casteel, B.W. DIers, P.D. Esker, J.E. Specht, and S.P. Conley. 2014. The use of reflectance data for in-season soybean yield prediction. Agronomy Journal 106:1159-1168.

Rowntree, S., J. Suhre, N. Weidenbenner, E. Wilson, V. Davis, S. Naeve, B. Diers, P. Esker, and S. Conley. 2014. Physiological and phenological responses of historical soybean cultivars to earlier planting. Crop Science 54:804-816.

Marburger, D., S. Conley, P. Esker, A. MacGuidwin, and D. Smith. 2014. Relationship between Fusarium virguliforme and Heterodera glycines in commercial soybean (fields in Wisconsin. Plant Health Progress doi:10.1094/PHP-RS-13-0107.

Wilson, E.W., S.C. Rowntree, J.J. Suhre, N.H. Weidenbenner, S.P. Conley, V.M. Davis, B.W. Diers, P.D. Esker, S.L. Naeve, and S.N Casteel. 2014. Genetic gain X management interactions in soybean: II. Nitrogen utilization. Crop Science 54:340-348.

Garrett, K. G., A.H. Sparks, and P. D. Esker. 2014. An introduction to key distributions and models in epidemiology using R. Chapter 1 in: Exercises in Plant Disease Epidemiology, 2nd Edition. K. L. Stevenson and M. J. Jeger (Eds.).

2013

Frost, K.E., P.D. Esker, R. Van Haren, L. Kotolski, and R.L. Groves. 2013. Seasonal patterns of aster leafhopper (Macrosteles quadrilineatus) abundance and aster yellows phytoplasma infectivity in Wisconsin carrot fields. Environmental Entomology 42:491-502.

Frost, K.E., P.D. Esker, R. Van Haren, L. Kotolski, and R.L. Groves. 2013. Factors influencing aster leafhopper (Macrosteles quadrilineatus) abundance and aster yellows phytoplasma infectivity in Wisconsin carrot fields. Environmental Entomology 42:477-490.

Rowntree, S.C., J.J. Suhre, N.H. Weidenbenner, E.W. Wilson, V.M. Davis, S.L. Naeve, S.N. Casteel, B.W. Diers, P.D. Esker, J. E. Specht, and S.P. Conley. 2013. Genetic gain x management interactions in soybean: I planting date. Crop Science 53:1128-1138.

2012

Esker, P.D., S. Savary, and N. McRoberts. 2012. Crop loss analysis and global food supply: focusing now on required harvests. CAB Reviews 7, No. 052.

Peltier, A., C. Bradley, M. Chilvers, D. Malvick, D. Mueller, K. Wise, and P. Esker. 2012. Sclerotinia stem rot of soybean: Biology and control. Journal of Integrated Pest Management 3(2), DOI:http://dx.doi.org/10.1603/IPM11033.

Willyerd, K.T., C. Li, L.V. Madden, C.A. Bradley, G.C. Bergstrom, L.E. Sweets, M. McMullen, J.K. Ransom, A. Grybauskas, L. Osborne, S.N. Wegulo, D.E. Hershman, K. Wise, W.W. Bockus, D. Groth, R. Dill-Mackey, E. Milus, P.D. Esker, K.D. Waxman, E.A. Adee, S.E. Ebelhar, B.G. Young, and P.A.Paul. 2012. Efficacy and Stability of integrating fungicide and cultivar resistance to manage Fusarium head blight and deoxynivalenol in wheat. Plant Disease 96:957-967.

Goeser, N.J., P.D. Mitchell, P.D. Esker, D. Curwen, G. Weis, and A.J. Bussen. 2012. Modeling long-term trends in potato growth and development in Wisconsin. Agronomy 2:14-27 (doi:10.3390/agronomy2010014).

Esker, P.D., and Conley, S.P. 2012. Probability of yield response and breaking-even for soybean seed treatments. Crop Science 52: 351-359.

2011

Swoboda, C.M., P. Pedersen, P.D. Esker, and G. Munkvold. 2011. Soybean yield response to plant distribution in Fusarium virguliforme infested soils. Agronomy Journal 103:1712-1716.

Conley, S. P., P. Pedersen, P. Esker, and J. Gaska. 2011. Soybean yield and Heterodera glycines response to rotation, tillage and source of genetic resistance. Agronomy Journal 103:1604-1609.

Lackermann, K. V., and P. D. Esker. 2011. Application of a rank-based method for improved cultivar selection in soft red winter wheat. Plant Disease 95:1407-1413.

Lackermann, K. V., Conley, S. P., Gaska, J. M., Martinka, M. J., and Esker, P. D. 2011. Effect of location, cultivar and disease severity on grain yield of soft red winter wheat in Wisconsin. Plant Disease 95:1401-1406.

Paul, P.A., L.V. Madden, C.A. Bradley, A. Robertson, G. Munkvold, G. Shaner, K. Wise, D. Malvick, T.W. Allen, A. Grybauskas, P. Vincelli, and P. Esker. 2011. Meta-analysis of yield response of hybrid field corn to foliar fungicides in the U.S. corn belt. Phytopathology 101:1122-1132.

Savary, S., A. Mila, L. Willocquet, P. Esker, O. Carrise, and N. McRoberts. 2011. Risk factors for crop health under global change and agricultural shifts: a framework of analyses using rice in tropical and subtropical Asia as a model. Phytopathology 101:696-709.

Jirak, J. C., and P. D. Esker. 2011. Tillage, crop rotation, and hybrid effects on residue and corn anthracnose occurrence in Wisconsin. Plant Disease 95:601-610.

2010

Ngugi, N. K., P. D. Esker, and H. Scherm. 2010. Meta-analysis to determine the effect of plant disease management measures: Review and case studies on soybean and apple. Phytopathology 101: 31-41.

Mueller, E. E., K. E. Frost, P. D. Esker, and C. Gratton. 2010. Seasonal phenology of Aphis glycines (Hemiptera: Aphididae) and other aphid species in cultivated bean and noncrop habitats in Wisconsin. Journal of Economic Entomology 103: 1670-1683.

Li, X., P. Esker, Z. Pan, A. P. Dias, L. Xue, and X. B. Yang. 2010. Uniqueness of soybean rust pathosystem: improved understanding of the risk in different regions of the world. Plant Disease 84: 796-806.

2009

Hughes, T. J., N. C. Koval, P. D. Esker, and C. R. Grau. 2009. Influence of monocropping brown stem rot-resistant and susceptible soybean cultivars on soil and stem populations of Phialophora gregata f.sp. sojae. Plant Disease 93: 1050-1058.

Scherm, H., R. S. C. Christiano, P. D. Esker, E. M. Del Ponte, and C. V. Godoy. 2009. Quantitative review of fungicide efficacy trials for managing soybean rust in Brazil. Crop Protection 28: 774-782.

Monteiro, J. E. B. A., P. C. Sentelhas, M. L. Gleason, P. D. Esker, and E. J. Chiavegato. 2009. Development of ramulosis disease of cotton under controlled environment and field conditions. Phytopathology 99: 659-665.

Cheatham, M., M. Rouse, P. Esker, S. Igancio, W. Pradel, R. Raymundo, A. Sparks, G. Forbes, T. Gordon, and K. Garrett. 2009. Beyond yield: Plant disease in the context of ecosystem services. Phytopathology99: 1228-1236.

Pethybridge, S. J., D. H. Gent, P. D. Esker, W. W. Turechek, F. S. Hay, and F. W. Nutter, Jr. 2009. Site-specific risk factors for ray blight in Tasmanian pyrethrum fields. Plant Disease 93: 229-237.

2008

Del Ponte, E. M., and P. D. Esker. 2008. Meteorological factors and Asian soybean rust epidemics – A systems approach and implications for risk assessment. Scientia Agricola 65: 88-97.

Pethybridge, S. J., F. S. Hay, P. D. Esker, D. H. Gent, C. R. Wilson, T. Groom, and F. W. Nutter, Jr. 2008. Diseases of pyrethrum in Tasmania: Challenges and prospects for management. Plant Disease 92: 1260-1272.

Xu, Z., M. L. Gleason, D. S. Mueller, C. A. Bradley, J. W. Buck, D. M. Benson, P. D. Esker, P. M. Dixon, and J. E. B. A. Monteiro. 2008. Overwintering of Sclerotium rolfsii and Sclerotium rolfsii var. delphinii in North Dakota, Iowa, North Carolina, and Georgia. Plant Disease 92: 719-724.

Pethybridge, S. J., F. Hay, P. Esker, T. Groom, C. Wilson, and F. W. Nutter, Jr. 2008. Visual and radiometric assessments for yield losses caused by ray blight in pyrethrum. Crop Science 48: 343-352.

Esker, P. D., A. H. Sparks, L. Campbell, Z. Guo, M. Rouse, S. D. Silwal, S. Tolos, B. Van Allen, and K. A. Garrett. 2008. Ecology and epidemiology in R: Disease forecasting and validation. Online. The Plant Health Instructor. DOI:0.1094/PHI-A-2008-029-01.

Sparks, A. H., P. D. Esker, G. Antony, L. Campbell, E. E. Frank, L. Huebel, M. N. Rouse, B. Van Allen, and K. A. Garrett. 2008. Ecology and epidemiology in R: Spatial analysis. Online. The Plant Health Instructor DOI:10.1094/PHI-A-2008-0129-03.

Sparks, A. H., P. D. Esker, M. Bates, W. Dall’ Acqua, Z. Guo, V. Segovia, S. D. Silwal, S. Tolos, and K. A. Garrett. 2008. Ecology and epidemiology in R: Disease progress over time. Online. The Plant Health Instructor. DOI:10.1094/PHI-A-2008-0129-02.

Garrett, K. A., P. D. Esker, and A. H. Sparks. 2008. An introduction to the R programming environment. Online. The Plant Health Instructor. DOI:10.094/PHI-A-2008-0129–02.

2007

Pethybridge, S. J., F. Hay, P. Esker, C. Wilson, and F. W. Nutter, Jr. 2007. Use of a multispectral radiometer for non-invasive assessments of foliar disease caused by ray blight in pyrethrum. Plant Disease 91: 1397-1406.

Esker, P. D., K. S. Gibb, P. M. Dixon, and F. W. Nutter, Jr. 2007. An application of space-time analysis to improve the epidemiological understanding of the papaya-papaya yellow crinkle pathosystem. Online. Plant Health Progress. doi: 10.1094/PHP-2007-0726-02-RS.

Pethybridge, S. J., P. D. Esker, P. Dixon, F. S. Hay, T. Groom, C. R. Wilson, and F. W. Nutter, Jr. 2007. Quantifying loss caused by ray blight disease in Tasmanian pyrethrum fields. Plant Disease 91: 1116-1121.

Garrett, K. A., P. D. Esker, A. H. Sparks, and L. C. Scharmann. 2007. Writing teaching documents as a class project. The Plant Health Instructor. DOI: 10.1094/PHI-T-2007-1226-01.

Esker, P. D., A. H. Sparks, M. Bates, W. Dall’ Acqua, E. E. Frank, L. Huebel, V. Segovia, and K. A. Garrett. 2007. Ecology and epidemiology in R: Modeling disease gradients. Online. The Plant Health Instructor. DOI:10.1094/PHI-A-2007-1226.03.

2006

Esker, P. D., J. Harri, P. M. Dixon, and F. W. Nutter, Jr. 2006. Comparison of models for forecasting of Stewart’s disease of corn in Iowa. Plant Disease 90:1353-1357.

Nutter, F. W., Jr., P. D. Esker, and R. A. Coelho Netto. 2006. Disease assessment concepts in Plant Pathology. European Journal of Plant Pathology 115:95-103.

Nutter, F. W., Jr., and P. D. Esker. 2006. The role of psychophysics in phytopathology. European Journal of Plant Pathology 114: 199-213.

Menelas, B., C. C. Block, P. D. Esker, and F. W. Nutter, Jr. 2006. Quantifying the feeding periods required by corn flea beetles to acquire and transmit Pantoea stewartii subsp. stewartii. Plant Disease 90: 319-324.

Esker, P. D., K. S. Gibb, A. Padovan, P. M. Dixon, and F. W. Nutter, Jr. 2006. Use of survival analysis to determine the postincubation time-to-death of papaya due to yellow crinkle disease in Australia. Plant Disease 90: 102-107.

2005

Pethybridge, S. J., P. D. Esker, F. Hay, C. Wilson, and F. W. Nutter, Jr. 2005. Spatiotemporal description of epidemics caused by Phoma ligulicola in Tasmanian pyrethrum fields. Phytopathology 95: 648-658.

Cook, K. A., R. A. Weinzierl, J. K. Pataky, P. D. Esker, and F. W. Nutter, Jr. 2005. Seasonal fluctuations in population densities of the corn flea beetle, Chaetocnema pulicaria (Melsheimer) (Coleoptera: Chrysomelidae) and the impact on the incidence of Stewart’s wilt in corn. J. Econ. Entomol. 98: 673-682.

2004

Esker, P. D., J. Obrycki, and F. W. Nutter, Jr. 2004. Trap height and orientation of yellow sticky traps affect capture of Chaetocnema pulicaria (Coleoptera: Chrysomelidae). J. Econ. Entomol. 97: 145-149.

2003

Esker, P. D. and F. W. Nutter, Jr. 2003. The temporal dynamics of corn flea beetle populations infested with Pantoea stewartii, the causal agent of Stewart's disease of corn. Phytopathology 93: 210-218.

2002

Esker, P. D., and F. W. Nutter, Jr. 2002. Assessing the risk of Stewart’s disease of corn through improved knowledge of the role of the corn flea beetle vector. Phytopathology 92: 668-670 (I. E. Melhus Graduate Student Symposium Award Paper).

Nutter, F. W., Jr., R. R. Rubsam, S. E. Taylor, J. A. Harri, and P. D. Esker. 2002. Use of geospatially-referenced disease and weather data to improve site-specific forecasts for Stewart’s disease of corn in the U.S. corn belt. Computers and Electronics in Agriculture 37(1-3): 7-14.

Esker, P.D., J. Obrycki, and F. W. Nutter, Jr. 2002. Temporal distribution of Chaetocnema pulicaria (Coleoptera: Chrysomelidae) populations in Iowa. J. Econ. Entomol. 95(4): 739-747.

2000

Nutter, F. W., Jr. and P. D. Esker. 2000. Disease assessment keys. Pages 323-326 in: Encyclopedia of Plant Pathology, Vol. 1. O. C. Maloy and T. D. Murray, eds. John Wiley and Sons, Inc., NY.