alan dyer

Alan Dyer, Associate Professor, PhD from University of Minnesota, 2002

Office: 208 Plant BioScience Building
Lab: 237 Plant BioScience Building

Office Phone:406-994-6535
Lab Phone: 406-994-7844

Fax: 406-994-7600
Email Dr. Dyer


The adoption of minimal tillage practices in Montana has enhanced the survival of residue and soil-borne pathogens of small grains. As pathogen populations increase, their negative impacts on small grains increase. By studying the survival of residue and soil-borne plant pathogens, we hope to define cultural practices that will mitigate the negative impacts of these pathogens.


Conduct research on fungal diseases of small grains. Teach introductory plant pathology (PS421) and team teach advanced plant pathology (PSPP 524) on alternating years. Advise graduate students in plant pathology


  • B.S. Plant Biology, Cornell University
  • M.S. Plant Pathology, University of Minnesota
  • Ph. D. Plant Pathology, University of Minnesota


  • American Phytopathological Society
  • American Association for the Advancement of Science


  • BIOM 421 - Introductory Plant Pathology
  • PS 524 - Advanced Plant Pathology (team taught)


Refereed Journals:

Moya, E.A., Jacobsen, B.J., Hogg, A.C., Dyer, A.T. 2011. Population dynamics between Fusarium pseudograminearum and Bipolaris sorokiniana in wheat stems using real-time qPCR. Plant Dis. (In press)

Moya, E.A., Rew, L.J., Jacobsen, B.J., Hogg, A.C., Dyer, A.T. 2011. Distribution and severity of Fusarium crown rot and common root rot of wheat in Montana using real-time qPCR and conventional isolation. Plant Dis. (In press)

Hogg, A.C., Johnston, R.H., Johnston, J.A., Klouser, L., Kephart, K.D., and Dyer, A.T. 2010. Monitoring Fusarium crown rot populations in spring wheat residues using quantitative real-time polymerase chain reaction. Phytopathology 100:49-57.

Dyer, A.T., Johnston, R.H., Hogg, A.C., and Johnston, J.A. 2009.  Comparison of pathogenicity of the Fusarium crown rot complex (F. culmorum, F. pseudograminearum and F. graminearum) on hard red spring and durum wheat.  Eur. J. Plant Pathol. 125:387-395.

Malvick, D.K., Grunwald, N. J. and Dyer, A.T.  2009. Population structure, races, and host range of Aphanomyces eutieches from alfalfa production fields in the central USA. Eur. J. Plant Pathol. 123:171-182.

Strausbaugh, C.A., Rearick, E., Camp, S., Gallian, J.J., and Dyer, A.T. 2008. Influence of beet  necrotic yellow vein virus on sugar beet storability. Plant Dis. 92:581-587.

Bruckner, P.L., Berg, J.E., Riveland, N., Eckhoff, J.L., Wichman, D.M., Kephardt, K.D., Carlson, G.R., Kushnak, G.D., Stougaard, R.N., Nash, D.L., Grey, W.E., Dyer, A.T., Jin, Y., and Chen, X., 2007. Registration of ‘Yellowstone’ wheat. Journal of Plant Registrations 1:18-19.

Dyer, A.T., Windels, C.E., Cook, R.D., and Leonard, K.J. 2007. Survival dynamics of Aphanomyces cochlioides’ oospores exposed to heat stress. Phytopathology 97:484-491

Hogg A.C., Johnston, R.H., and Dyer A.T. 2007. Applying real-time quantitative PCR to Fusarium crown rot of wheat. Plant Dis. 91:1021-1028. “Editor’s Pick”

Lanning, S.P., G. R. Carlson, D. Nash , D. M. Wichman, K. D. Kephart, R. N. Stougaard, G. D. Kushnak, J. L. Eckhoff, W. E. Grey, Dyer, A., and Talbert, L.E. 2006. Registration of “Vida” spring wheat. Crop Sci. 46: 2315-2316.

Dyer, A.T., Szabo, L.J., and Windels, C.E. 2004. Characterization and spatial distribution of Aphanomyces in sugarbeet fields. J. Sugar Beet Res. 40:1-16.

Dyer, A.T., and Windels, C.E. 2003. Viability and maturation of Aphanomyces cochlioides oospores. Mycologia 95:321-326.

Dyer, A.T., and Leonard K.J. 2000. Contamination, error and non-specific molecular techniques. Phytopathology 90:565-567.

Goodwin, S.B., Sujkowski, L.S., Dyer, A.T., Fry, B.A., and Fry W.E. 1995. Direct detection of gene flow and probable sexual reproduction of Phytophthora infestans in northern North America. Phytopathology 84:473-479.

Koh, Y.J., Goodwin, S.B., Dyer, A.T., Ogoshi, A., Sato, N., and Fry, W.E. 1994. Migrations and displacements of Phytopthora infestans populations in east Asian countries. Phytopathology 84:922-927.

Shtienberg. D., Raposo, R., Bergeron, S.N., Legard, D.E., Dyer, A.T., and Fry, W.E. 1994. Incorporation of cultivar resistance in a reduced-sprays strategy to suppress early and late blights of potato. Plant Disease 78:23-26.

Sujkowski, L.S., Goodwin, S.B., Dyer, A.T., and Fry, W.E. 1994. Increased genotypic diversity via migration and possible occurrence of sexual reproduction of Phytophthora infestans in Poland. Phytopathology 84:201-207.

Fry, W.E., Goodwin, S.B., Dyer A.T., Matuszak, J.M., Drenth, A., Tooley, P.W., Sujkowski, L.S., Koh, Y.J., Cohen, B.A., Speilman, L.J., Deahl, K.L., Inglis, D.A., and Sandlan, K.P. 1993. Historical and recent migrations of Phytophthora infestans: chronology, pathways, and implications. Plant Disease 77:653-661.

Dyer, A.T., and Sinclair, W.A. 1991. Root necrosis and histological changes in surviving roots of white ash infected with mycoplasma like organisms. Plant Disease 75:814-819.

Sinclair, W.A., Iuli, R.J., Dyer, A. T., Marshall, P.T., Matteoni, J.A., Hibben, C.R., Stanosz, G.R., and Burns, B.S. 1990. Ash yellows- Geographic range and association with decline of white ash. Plant Disease 74:604-607.

Sinclair, W.A., Iuli, R.J., Dyer, A.T., and Larsen, A.O. 1989. Sampling and histological procedures for diagnosis of ash yellows. Plant Disease 73:432-435.

Recent Contributions to Meetings:

Keren, I.N., Menalled, F., Weaver, D., Dyer, A.T., and Robison-Cox, J. 2010. A total systems approach to modeling and pest management in wheat cropping systems. E.S.A. Annual Meeting.

Keren, I.N., Menalled, F., Weaver, D., Dyer, A.T., and Robison-Cox, J. 2009. Joint management of wheat stem sawfly(Cephus cinctus), Fusarium crown rot, and cheatgrass (Bromus tectorum): assessing the ecological basis of a total systems approach to pest management strategies. E.S.A. Annual Meeting.

Keren, I. F. Menalled, D. Weaver, A. Dyer, and J. Robison-Cox. 2009. A proposed analysis for the total system approach to pest management in agriculture. Annual Meeting of the Montana Chapter of the American Statistical Association. Butte, MT

Moya, E.A., Dyer, A., Hogg, A., and Jacobsen, B.J. 2009.  Determining the distribution and prevalence of Fusarium crown rot and common root rot in Montana wheat using real-time qPCR

Dyer, A.T. 2008.Fusarium population dynamics in wheat. USDA- Western Regional Project W2147. “Managing plant microbe interactions in soil to promote sustainable agriculture”.

Grey, W., Dyer, A. and Talbert, L. 2008. Responding to Fusarium Head Blight and Grain Deoxynivalenol in Montana. Midwest Association of Analytical Communities.

Hogg A.C., Johnston R.H., Dyer A.T. 2007. Monitoring Fusarium populations in no-till wheat cropping systems utilizing quantitative real-time PCR Phytopathology 97 (7): S47-S47 Suppl.

Johnson W.A., Johnston R.H., Dyer A.T. 2007. Root lesion nematode (Pratylenchus nelgectus) found in wheat fields in Montana Phytopathology 97 (7): S53-S53 Suppl.

Strausbaugh C.A., Rearick E., Camp S., Gallian J.J., Dyer (A.) T. 2007. Sugar beet storability and the influence of Beet necrotic yellow vein virus. Phytopathology 97 (7): S111-S111 Suppl.

Sun, Z., Weaver D.K., Grey, W.E., Dyer, A. and Morrill, W.L. 2006. Impact of the naturally-occurred Fusarium species on the overwintering larvae of wheat stem sawfly, Cephus cinctus (Hymenoptera: Cephidae). Abstract Annual Meeting, Entomological Society of America.

Extension Publications:

Burrows, M. Dyer, A., Grey, W. 2010. Small grain root and crown diseases. Montguide: Extension Distribution Center

Johnson, W.A., Johnston, R.H., Grey, W., Burrows, M., and Dyer, A.T. 2008. Root lesion nematodes in wheat. Montguide: Extension Distribution Center

Burrows, M., Grey, W., and Dyer, A. 2008. Fusarium head blight (scab) of wheat and barley. MontGuide: Extension Distribution Center

Dyer, A., Burrows, M., Johnston, R., and Tharp, C., 2007. Small Grain Seed Treatment Guide. Montguide #MT 199608 AG. Extension Distribution Center