Margaret Ellis, Ph.D.


Assistant Professor in Plant Pathology
Office: Ag 223
Phone: (559) 278-1692

Office Hours:  Monday 9 am-12 pm or by appointment

Current Courses:

Fall: PLTH 104 (Plant Nematology); PLTH 106 (Plant Pathology);
Spring: PLTH 109 (Diagnosis and Control of Plant Diseases); PLANT 170T (Mycology); Plant 150 Crop Improvement



Ph.D. in Plant Pathology from The Ohio State University, December 2011

M.S. in Plant Pathology from Michigan State University, December 2007

B.S. in Biology from the University of Illinois Urbana-Champaign, May 2003

Current Student Research Projects:

Josue Diaz (Graduate Student and Harvey-Jordan Fellowship Recipient) - Evaluation of the potential interaction of Fusarium oxysporum f. sp. vasinfectum with Rhizoctonia solani on disease development of cotton and evaluation of fungicide chemistries for the management of these fungal pathogens.

Mala To (Graduate Student) - Development of a DNA extraction method from epidemiologically meaningful amounts of soil for quantification of nematodes using quantitative PCR.

Vivian Maier (Undergraduate Student) – Research on Fusarium oxysporum f.sp. vasinfectum race 4.  Vivian has been awarded an undergraduate USDA-NLGCA internship for her work on her project.


Cruz Jimenez, D.R., Ellis, M.L., Munkvold, G.P., and Leandro, L.F., 2018. Isolate x cultivar interactions, in-vitro growth and fungicide sensitivity of Fusarium oxysporum isolates causing seedling disease on soybean. Plant Disease. Accepted.

Lanubile, A., Ellis, M.L., Marocco, A., and Munkvold, G.P. 2016. Association of effector Six6 with vascular wilt symptoms caused by Fusarium oxysporum on soybean. Phytopathology. 106: 1404-1412.

Stasko, A.K., Wickramasinghe, D., Nauth, B.J., Acharya, B., Ellis, M.L., Taylor, C.G., McHale, L.K., and Dorrance, A.E. 2016. High-density mapping of resistance QTL toward Phytophthora sojae, Pythium irregulare, and Fusarium graminearum in the same soybean population. Crop Science. doi:10.2135/cropsci2015.12.0749.

Ellis, M.L., Lanubile, A., Garcia, C. and Munkvold, G.P. 2016.  Association of putative fungal effectors in Fusarium oxysporum with wilt symptoms in soybean.  Phytopathology.  106: 1404-1412.

Ellis, M.L., Cruz Jimenez, D.R., Leandro, L.F., and Munkvold, G.P. 2014. Genotypic and phenotypic characterization of fungi in the Fusarium oxysporum species complex from soybean roots. Phytopathology. 104:1329-1339.

Ellis, M.L., and Munkvold, G.P. 2014. Trichothecene genotype of Fusarium graminearum isolates from soybean seedlings and root diseases in the United States. Plant Disease. 98: 1012.

Matthiesen, R.L., Ahmad, A.A., Ellis, M.L., and Robertson, A.E. 2014. First report of Pythium schmitthenneri causing maize seedling blight in Iowa. Plant Disease. 98: 994.

Díaz Arias, M.M, Munkvold, G.P, Ellis, M.L., and Leandro, L.F. 2013. Distribution and frequency of Fusarium species associated with soybean roots in Iowa. Plant Disease. 97:1557-1562.

Ellis, M.L., McHale, L.K., Paul, P.A., St. Martin, S.K., and Dorrance, A.E. 2013. Soybean germplasm resistant to Pythium irregulare and molecular mapping of resistance quantitative trait loci derived from the soybean accession PI 424354. Crop Science. 53:1008-1021.

Ellis, M.L., Díaz Arias, M.M., Cruz Jimenez, D.R., Munkvold, G.P, and Leandro, L.F. 2013. First report of Fusarium commune causing damping-off, seed rot, and seedling root rot on soybean (Glycine max) in the United States. Plant Disease. 97:284.

Ellis, M.L., Díaz Arias, M.M., Leandro, L.F., and Munkvold, G.P. 2012. First report of Fusarium armeniacum causing seed rot and root rot on soybean (Glycine max) in the United States. Plant Disease. 96:1693.

Ellis, M.L., Wang, H., Paul, P.A., St. Martin, S.K., McHale, L.K., and Dorrance, A.E. 2012. Identification of soybean genotypes resistant to Fusarium graminearum and genetic mapping of resistance quantitative trait loci in the cultivar Conrad. Crop Science. 52:2224-2233.  

Ellis, M.L., Broders, K.D., Paul, P.A., and Dorrance, A.E. 2012. Two new species of Pythium, P. schmitthenneri and P. selbyi pathogens of corn and soybean in Ohio. Mycologia. 104: 477-487.

Ellis, M.L., Broders, K.D., Paul, P.A., and Dorrance, A.E. 2011. Infection of soybean seed by F. graminearum and effect of seed treatments on disease under controlled conditions. Plant Disease. 95:401-407.

Zelaya-Molina, L.X., Ellis, M.L., Berry, S.A., and Dorrance, A.E. 2010. First report of Phytophthora sansomeana causing wilting and stunting on corn in Ohio. Plant Disease. 94: 125.

Broders, K.D., Lipps, P.E., Ellis, M.L., and Dorrance, A.E. 2009. Pythium delawarii-a new species isolated from soybean in Ohio. Mycologia. 101: 232-238.

Ellis, M.L. 2007. Distribution, identification, and population diversity of Armillaria spp. in Michigan cherry orchards. Thesis. The Michigan State University. East Lansing, Michigan.