Michael E. Gray

Professor Emeritus

Primary Disciplines

Education

  • B.A.: Biology, University of Northern Iowa, Cedar Falls, IA, 1977
  • M.S.: Entomology, Iowa State University, Ames, IA, 1982
  • Ph.D.: Entomology, Iowa State University, Ames, IA, 1986

Chapters in Books

  • Gray, M.E. & W.H. Luckmann. 1994. Integrating the cropping system for corn insect pest management. Chapter 12, pages 507-541 in Introduction to Insect Pest Management. R.L. Metcalf & W.H. Luckmann [eds.], John Wiley & Sons, Inc., NY.
  • Steffey, K.L., M.E. Gray & L.G. Higley. 1994. Introduction to identification and diagnosis of injury. Pages 17-34 in ESA Handbook of Soybean Insect Pests. Entomol. Soc. Am., Lanham, MD.
  • Gray, M.E., E. Levine & H. Oloumi-Sadeghi. 1998. Adaptation to crop rotation: western and northern corn rootworms respond uniquely to a cultural practice. Volume 2, pages 19-31 in Recent Res. Developments in Entomology. S.G. Pandalai [ed.], Research Signpost, Trivandrum, India.
  • Steffey, K.L., M.E. Rice & M.E. Gray. 1999. Identification of insects and diagnosis of injury. Pages 22-43 in Handbook of Corn Insects, K.L. Steffey, M.E. Rice, J. All, D.A. Andow, M.E. Gray & J.W. Van Duyn [eds.], Entomol. Soc. Am., Lanham, MD.
  • Gray, M.E. 2002. Crop rotations (insects and mites). Pages 169-171 in Encyclopedia of Pest Management. (ed.) David Pimentel, Marcel Dekker, Inc., New York, NY (ISBN 0-8247-0632-0).
  • Gerber, C.K., C.R. Edwards, L.W. Bledsoe, M.E. Gray, K.L. Steffey & L.D. Chandler. 2005. Application of the areawide concept using semiochemical-based insecticide baits for managing the western corn rootworm (Diabrotica virgifera virgifera LeConte) variant in the eastern Midwest. Pages 221-238. In Western Corn Rootworm: Ecology and Management. (Eds.) S. Vidal, U. Kuhlman & C.R. Edwards. CAB International, Wallingford, UK, (ISBN 0-85-199-817- 8).
  • Gray, M.E., S.T. Ratcliffe & M.E. Rice. 2009. The IPM paradigm: concepts, strategies and tactics. Chapter 1, pages 1-13. In Integrated Pest Management Concepts, Tactics, Strategies and Case Studies. (eds.) E.B. Radcliffe, W.D. Hutchison, and R.E. Cancelado, Cambridge University Press.

Selected Articles in Journals

  • Mekete, T., M.E. Gray, T.L. Niblack. 2009. Distribution, morphological description, and molecular characterization of Xiphinema and Longidorous spp. associated with plants (Miscanthus spp. and Panicum virgatum) used for biofuels. Global Change Biology Bioenergy. 1(4): 257-266.
  • Prasifka, J.R., J.D. Bradshaw, R.L. Meagher, R.N. Nagoshi, K.L. Steffey, and M.E. Gray. 2009. Development and feeding of fall armyworm on Miscanthus x giganteus and switchgrass. J. Econ. Entomol. 102(6): 2154-2159.
  • Agindotan, B.O., M.O. Ahonsi, L.L. Domier, M.E. Gray and C.A. Bradley. 2010. Application of sequence-independent amplification (SIA) for the identification of RNA viruses in bioenergy crops. J. Virological Methods. 169(1): 119-128.
  • Ahonsi, M.O., B.O. Agindotan, D.W. Williams, R. Arundale, M.E. Gray, T.B. Voigt, and C.A. Bradley. 2010. First report of Pithomyces chartarum causing a leaf blight of Miscanthus x giganteus in Kentucky. Plant Disease 94(4): 480.
  • Bradshaw, J.D., J.R. Prasifka, K.L. Steffey, and M.E. Gray. 2010. First report of field populations of two potential aphid pests of the bioenergy crop Miscanthus x giganteus. Florida Entomologist 93(1): 135-137.
  • Prasifka, J.R., J.D. Bradshaw, A.A. Boe, D.K. Lee, D. Adamski, and M.E. Gray. 2010. Symptoms, distribution and abundance of the stem-boring caterpillar, Blastobasis repartella (Dietz), in switchgrass. Bioenergy Research. 3(3): 238-242.
  • Ahonsi, M.O., B.O. Agindotan, M.E. Gray, and C.A. Bradley. 2011. First report of a basal stem rot and foliar blight caused by Pythium sylvaticum on Miscanthus sinensis in Illinois, USA. Plant Disease Note 95: 616.
  • Mekete, T., K. Reynolds, H.D. Lopez-Nicora, M.E. Gray and T.L. Niblack. 2011. Distribution and diversity of root-lesion nematode (Pratylenchus spp.) associated with Miscanthus x giganteus and Panicum virgatum used for biofuels, and species identification in a multiplex polymerase chain reaction. Nematology 13(6): 673-686.
  • Mekete, T., K. Reynolds, H. Lopez-Nicora, M. Gray and T.L. Niblack. 2011. Plant-parasitic nematodes are potential pathogens of Miscanthus x giganteus and Panicum virgatum used for biofuels. Plant Disease 95(4): 413-418.
  • Prasifka, J.R., J.E. Buhay, T.W. Sappington, E.A. Heaton, J.D. Bradshaw, and M.E. Gray. 2011. Stem-boring caterpillars of switchgrass in the Midwestern United States. Ann. Entomol. Soc. Am. 104(3): 507-514.
  • Prasifka, J.R., J.D. Bradshaw, S.T. Lee, and M.E. Gray. 2011. Relative feeding and development of armyworm on switchgrass and corn, and its potential effects on switchgrass grown for biomass. J. Econ. Entomol. 104(5): 1561-1567.
  • Prasifka, J.R., D.K. Lee, J.D. Bradshaw, A.S. Parrish, and M.E. Gray. 2012. Seed reduction in prairie cordgrass, Spartina pectinata Link., by the floret-feeding caterpillar Aethes spartinana (Barnes and McDunnough). BioEnergy Research 5: 189-196.
  • Villamil, M.B., M. Alexander, A.H. Silvis, and M.E. Gray. 2012. Producer perceptions and information needs regarding their adoption of bioenergy crops. Renewable and Sustainable Energy Reviews. 16: 3604-3612.
  • Prasifka, J.R., J.D. Bradshaw, and M.E. Gray. 2012. Potential biomass reductions to Miscanthus x giganteus by stem-boring caterpillars. Environ. Entomol: 41(4): 865-871.
  • Prasifka, J.R., and M.E. Gray. 2012. Research needs and potential effects of biomass crops on pest management. J. Integ. Pest Mngmt. 3(4). DOI: http://dx.doi.org/10.1603/IPM12011.
  • Agindotan, B.O., M.E. Gray, R.W. Hammond, and C.A. Bradley. 2012. Complete genome sequence of switchgrass mosaic virus, a member of a proposed new species in the genus Marafivirus. Archives of Virology. 157(9): 1825-1830.
  • Agindotan, B., N. Okanu, A. Oladeinde, T.Voigt, S. Long, M. Gray, and C. Bradley. 2013. Detection of Switchgrass mosaic virus in Miscanthus and other grasses. Can. J. Plant Pathology. 35(1): 81-86.
  • Ahonsi, M.O., K.A. Ames, M.E. Gray, and C.A. Bradley. 2013. Biomass reducing potential and prospective fungicide control of a new leaf blight of Miscanthus x giganteus caused by Leptosphaerulina chartarum. Bioenergy Research 6(2): 737-745.
  • Agindotan, B.O., J.R. Prasifka, M.E. Gray, C.H. Dietrich, and C.A. Bradley. 2013. Transmission of Switchgrass mosaic virus by Graminella aureovittata. Can. J. Plant Pathol. 35(3): 384-389.
  • Pallipparambil, G.R., G. Cha, and M.E. Gray. 2014. A comparative life-table analysis of Sipha flava (Hemiptera: Aphididae) on two biofuel hosts, Miscanthus x giganteus and Saccharum spp. J. Econ. Entomol. 107(3): 1069-1075.
  • Steffey, K.L. & M.E. Gray. 1992. Extension-research synergism: enhancing the continuum from discovery to delivery. Am. Entomol. 38: 204-205.
  • Gray, M.E. & C.R. Edwards. 1993. Role of the Extension specialist in developing a crop management system. Am. Entomol. 39: 204-205.
  • Gray, M.E. 1994. Identifying our ESA clientele: can they identify us? Amer. Entomol. 40: 200-201.
  • Czapar, G.F., M.P. Curry & M.E. Gray. 1995. Survey of integrated pest management practices in central Illinois. J. Prod. Agric. 8: 483-486.
  • Gray, M.E. 1995. Status of CES-IPM programs: results of a national IPM coordinators survey. Am. Entomol. 41: 136-138.
  • Gray, M.E. & K.L. Steffey. 1998. Status of extension entomology programs: a national assessment. Am. Entomol. 44: 9-13.
  • Gray, M.E. 2001. The role of extension in promoting IPM programs. Amer. Entomol. 47(3): 134-137.
  • Ratcliffe, S.T., and M.E. Gray. 2004. Will the USDA IPM Centers and the National IPM Roadmap increase IPM accountability? - Responses to the 2001 General Accounting Office Report. Am. Entomol. 50(1): 6-9.
  • Gray, M.E. 2011. Relevance of traditional integrated pest management (IPM) strategies for commercial corn producers in a transgenic agroecosystem: a bygone era? J. Agricultural and Food Chemistry. 59(11): 5852-5858
  • Ahonsi, M.O., K.A. Ames, M.E. Gray, and C.A. Bradley. 2013. Biomass reducing potential and prospective fungicide control of a new leaf blight of Miscanthus x giganteus caused by Leptosphaerulina chartarum. Bioenergy Research 6(2): 737-745.
  • Hodgson, E.W., R. Wright, M. Gray, T. Hunt, K. Ostlie, and D.A. Andow. 2015. Farmer responses to resistance issues in corn rootworm to Bt corn: qualitative analysis of focus groups. J. Extension. 53(2): 2RIB7.
  • Gray, M.E., J.R. Coats & J.J. Tollefson. 1984. Effect of an insecticide and a herbicide combination on corn rootworm (Coleoptera: Chrysomelidae) damage. J. Econ. Entomol. 77: 465-467.
  • Gray, M.E. & J.J. Tollefson. 1987. Influence of tillage and western and northern corn rootworm (Coleoptera: Chrysomelidae) egg populations on larval populations and root damage. J. Econ. Entomol. 80: 911-915.
  • Gray, M.E. & J.J. Tollefson. 1988. Survival of the western and northern corn rootworms (Coleoptera: Chrysomelidae) in different tillage systems throughout the growing season. J.Econ. Entomol. 81: 178-183.
  • Gray, M.E. & J.J. Tollefson. 1988. Emergence of the western and northern corn rootworms (Coleoptera: Chrysomelidae) from four tillage systems. J. Econ. Entomol. 81: 1398-1403.
  • Gray, M.E. & J.J. Tollefson. 1988. Influence of tillage systems on western and northern corn rootworm (Coleoptera: Chrysomelidae) egg populations. J. Kans. Entomol. Soc. 61: 186-194.
  • Boetel, M.A., D.D. Walgenbach, G.L. Hein, B.W. Fuller & M.E. Gray. 1992. Oviposition site selection of the northern corn rootworm (Coleoptera: Chrysomelidae). J. Econ. Entomol. 85: 246-249.
  • Gray, M.E., A.S. Felsot, K.L. Steffey & E. Levine. 1992. Planting time application of soil insecticides and western corn rootworm (Coleoptera: Chrysomelidae) emergence: implications for long-term management programs. J. Econ. Entomol. 85: 544-553.
  • Gray, M.E., G.L. Hein, M.A. Boetel & D.D. Walgenbach. 1992. Western and northern corn rootworm (Coleoptera: Chrysomelidae) egg densities at three soil depths: implications for future ecological studies. J. Kansas Entomol. Soc. 65: 354-356.
  • Steffey, K.L., M.E. Gray & D.E. Kuhlman. 1992. Extent of corn rootworm (Coleoptera: Chrysomelidae) larval damage in corn after soybeans: search for the expression of the prolonged diapause trait in Illinois. J. Econ. Entomol. 85: 268-275.
  • Gray, M.E., K.L. Steffey & H. Oloumi-Sadeghi. 1993. Participatory on-farm research in Illinois cornfields: an evaluation of established soil insecticide rates and prevalence of corn rootworm (Coleoptera: Chrysomelidae) injury. J. Econ. Entomol. 86: 1473-1482.
  • Levine, E. & M.E. Gray. 1994. Use of cucurbitacin vial traps to predict corn rootworm (Coleoptera: Chrysomelidae) larval injury in a subsequent crop of corn. J. Entomol. Sci. 29: 590-600.
  • Gray, M.E. & K.L. Steffey. 1995. On-farm validation of pherocon AM trap utility for corn rootworms (Coleoptera: Chrysomelidae): outlook for producer acceptance in Illinois. J. Sustainable Agriculture VII, Issue 2/3: 121-135.
  • Buhler, W., C.R. Edwards, L.W. Bledsoe, C. Gerber, M.E. Gray & K.L. Steffey. 1998. Areawide pest management of western corn rootworm in Indiana and Illinois - turning the first corner. Pflanzenschutzberichte: Band 57 Heft 2: 69-74.
  • Gray, M.E. & K.L. Steffey. 1998. Corn rootworm (Coleoptera: Chrysomelidae) larval injury and root compensation of 12 maize hybrids: an assessment of the economic injury index. J. Econ. Entomol. 91: 723-740.
  • O'Neal, M.E., M.E. Gray & C.A. Smyth. 1999. Population characteristics of a western corn rootworm (Coleoptera: Chrysomelidae) strain in east-central Illinois corn and soybean fields. J. Econ. Entomol. 92: 1301-1310.
  • O'Neal, M.E., M.E. Gray, S. Ratcliffe & K.L. Steffey. 2001. Predicting western corn rootworm (Coleoptera: Chrysomelidae) larval injury to rotated corn with Pherocon AM traps in soybeans. J. Econ. Entomol. 94(1): 98-105.
  • Onstad, D.W., C.A. Guse, J.L. Spencer, E. Levine & M.E. Gray. 2001. Modeling the dynamics of adaptation to transgenic corn by western corn rootworm (Coleoptera: Chrysomelidae). J. Econ. Entomol. 94(2): 529-540.
  • Onstad, D.W., C.A. Guse, J.L. Spencer, E. Levine & M.E. Gray. 2001. Modeling the dynamics of adaptation to transgenic corn by western corn rootworm (Coleoptera: Chrysomelidae). J. Econ. Entomol. 94(2): 529-540.
  • Levine, E., J.L. Spencer, S.A. Isard, D.W. Onstad & M.E. Gray. 2002. Adaptation of the western corn rootworm to crop rotation: evolution of a new strain in response to a management practice. Am. Entomol. 48(2): 94-107.
  • Onstad, D.W., D.W. Crowder, S.A. Isard, E. Levine, J.L. Spencer, M.E. O'Neal, S.T. Ratcliffe, M.E. Gray, L.W. Bledsoe, C.D. DiFonzo, J.B. Eisley, and C.R. Edwards. 2003. Does landscape diversity slow the spread of rotation-resistant western corn rootworm (Coleoptera: Chrysomelidae)? Environ. Entomol. 32(5): 992-1001.
  • Onstad, D.W., D.W. Crowder, P.D. Mitchell, C.A. Guse, J.L. Spencer, E. Levine, and M.E. Gray. 2003. Economics versus alleles: balancing integrated pest management and insect resistance management for rotation-resistant western corn rootworm (Coleoptera: Chrysomelidae). J. Econ. Entomol. 96(6): 1872-1885.
  • Rondon, S.I., and M.E. Gray. 2003. Captures of western corn rootworm (Coleoptera: Chrysomelidae) adults with Pherocon AM and vial traps in four crops in east central Illinois. J. Econ. Entomol. 96(3): 737-747.
  • Mitchell, P.D., M.E. Gray, and K.L. Steffey. 2004. A composed-error model for estimating pest-damage functions and the impact of the western corn rootworm soybean variant in Illinois. American Journal of Agricultural Economics: 86(2): 332-344.
  • Rondon, S.I., and M.E. Gray. 2004. Ovarian development and ovipositional preference of the western corn rootworm (Coleoptera: Chrysomelidae) variant in east central Illinois. J. Econ. Entomol. 97(2): 390-396.
  • Crowder, D.W., D.W. Onstad, M.E. Gray, C.M.F. Pierce, A.G. Hager, S.T. Ratcliffe, and K.L. Steffey. 2005. Analysis of the dynamics of adaptation to transgenic corn and crop rotation by western corn rootworm (Coleoptera: Chrysomelidae) using a daily time-step model. J. Econ. Entomol. 98(2): 534-551.
  • Crowder, D.W., D.W. Onstad, M.E. Gray, P.D. Mitchell, J.L. Spencer, and R.J. Brazee. 2005. Economic analysis of dynamic management strategies utilizing transgenic corn for control of western corn rootworm (Coleoptera: Chrysomelidae). J. Econ. Entomol. 98(3): 961-975.
  • Kaster, L.V., and M.E. Gray. 2005. European corn borers and western corn rootworms: old and new invasive maize pests challenge farmers on European and North American continents. Maydica. 50:235-245. (Commemorative 50th Anniversary IPublication).
  • Schroeder, J.B., S.T. Ratcliffe, and M.E. Gray. 2005. Effect of four cropping systems on variant western corn rootworm (Coleoptera: Chrysomelidae) adult and egg densities and subsequent larval injury in rotated maize. J. Econ. Entomol. 98(5): 1587-1593.
  • Crowder, D.W., D.W. Onstad, and M.E. Gray. 2006. Planting transgenic insecticidal corn based on economic thresholds: consequences for integrated pest management and insect resistance management. J. Econ. Entomol. 99(3): 899-907.
  • Pierce, C.M.F. & M.E. Gray. 2006. Western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), oviposition: a variant's response to maize phenology. Environ. Entomol. 35(2): 423-434.
  • Pierce, C.M.F. & M.E. Gray. 2006. Seasonal oviposition of a western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), variant in east central Illinois commercial maize and soybean fields. Environ. Entomol. 35(3): 676-683.
  • Schroeder, J.B., M.E. Gray, S.T. Ratcliffe, R.E. Estes, and S.P. Long. 2006. Effects of elevated CO2 and O3 on a variant of the western corn rootworm (Coleoptera: Chrysomelidae). Environ. Entomol. 35(3): 637-644.
  • Gray, M.E., K.L. Steffey, R.E. Estes, and J.B. Schroeder. 2007. Responses of transgenic maize hybrids to variant western corn rootworm larval injury. J. Appl. Entomol. 131(6): 386-390.
  • Pierce, C.M.F. & M.E. Gray. 2007. Population dynamics of a western corn rootworm(Coleoptera: Chrysomelidae) variant in east central Illinois commercial maize and soybean fields. J. Econ. Entomol. 100(4): 1104-1115.
  • Gray, M.E., T.W. Sappington, N.J. Miller, J. Moeser, & M.O. Bohn. 2009. Adaptation and invasiveness of western corn rootworm: intensifying research on a worsening pest. Ann. Rev. Entomol. 54: 303-321.
  • Miller, N.J., T. Guillemaud, R. Giordano, B.D. Siegfried, M.E. Gray, L.J. Meinke, and T.W. Sappington. 2009. Genes, gene flow and adaptation of Diabrotica virgifera virgifera. Agricultural and Forest Entomology: 11: 47-60.
  • Tinsley, N.A., R.E. Estes, and M.E. Gray. 2013. Validation of a nested error component model to estimate damage caused by corn rootworm larvae. J. Appl. Entomol. 137(3): 161-169.
  • Prasifka, J.R., J.L. Spencer, N.A. Tinsley, R.E. Estes, and M.E. Gray. 2013. Adult activity and oviposition of corn rootworms, Diabrotica spp. (Coleoptera: Chrysomelidae), in Miscanthus, corn and switchgrass. J. Appl. Entomol. 137(7): 481-487.
  • Petzold-Maxwell, J.L., A.P. Alves, R.E. Estes, M.E. Gray, L.J. Meinke, E.J. Shields, S.D. Thompson, N.A. Tinsley, and A.J. Gassmann. 2013. Applying an integrated refuge to manage western corn rootworm (Coleoptera: Chrysomelidae): effects on survival, fitness, and selection pressure. J. Econ. Entomol. 106(5): 2195-2207.
  • Petzold-Maxwell, J.L., L.J. Meinke, M.E. Gray, R.E. Estes, and A.J. Gassmann. 2013. Effect of Bt maize and soil insecticides on yield, injury, and rootworm survival: implications for resistance management. J. Econ. Entomol. 106(5): 1941-1951.
  • Cullen, E.M., M.E. Gray, A.J. Gassmann, and B.E. Hibbard. 2013. Resistance to Bt corn by western corn rootworm (Coleoptera: Chrysomelidae) in the U.S. corn belt. J. Integ. Pest Mngmt. 4(3):
  • Kang, J., C.H. Krupke, A.F. Murphy, J.L. Spencer, M.E. Gray, and D.W. Onstad. 2014. Modeling a western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) maturation delay and resistance evolution in Bt corn. Pest Manag. Sci. 70: 996-1007.
  • Tinsley, N.A., J.L. Spencer, R.E. Estes, J.R. Prasifka, P.M. Schrader, B.W. French, and M.E. Gray. 2015. Larval mortality and development for rotation-resistant and rotation-susceptible populations of western corn rootworm on Bt corn. J. Appl. Entomology. 139: 46-54.
  • Frank, D.L., R. Kurtz, N.A. Tinsley, A.J. Gassmann, L.J. Meinke, D. Moellenbeck, M.E. Gray, L.W. Bledsoe, C.H. Krupke, R.E. Estes, P. Weber, and B.E. Hibbard. 2015. Effect of seed blends and soil-insecticide on western and northern corn rootworm emergence from mCry3A + eCry3.1Ab Bt maize. J. Econ. Entomol. 108(3): 1260-1270.
  • Estes, R.E., N.A. Tinsley, and M.E. Gray. 2015. Evaluation of soil-applied insecticides with Bt maize for managing corn rootworm larval injury. J. Appl. Entomology. DOI: 10.1111/jen.12233.
  • Tinsley, N.A., R.E. Estes, P.M. Schrader, and M.E. Gray. 2015. Evaluating multiple approaches for managing western corn rootworm larvae with seed blends. J. Appl. Entomology. 139: 76-86.