Plant Pathology and Microbiology

Plant Pathology and Microbiology / Dr. Mark Gleason

Dr. Mark Gleason

  Dr. Mark Gleason
Professor, Extension Plant Pathologist

313 Bessey Hall
Iowa State University
Ames, IA 50011
Phone: 515-294-0579

Lab homepage
Courses Taught

Sus Ag 530, Ecologically Based Pest Management. Co-instructors: Matt Liebman (Agronomy) and Matt O’Neal (Entomology). Graduate course. Alternate fall semesters.

Pl P/Ent/Hort 511, Integrated Management of Tropical Crops. Co-instructors: Donald Lewis (Entomology) and Gail Nonnecke (Horticulture). Graduate/undergraduate course. Alternate spring semesters.

Pl P/Ent/Hort 452/552, Integrated Management of Turfgrass Diseases and Insect Pests. Co-instructor: Donald Lewis. Graduate/undergraduate course. Alternate spring semesters.

Pl P/Hort /Ent 252. Distance-learning course: Integrated Management of Turfgrass Diseases and Insect Pests. To be offered via the Web in Spring 2008.

Hort 424/524, Sustainable and Environmental Horticulture. Co-instructor: Gail Nonnecke. Graduate/undergraduate course. Alternate fall semesters.

Pl P 691, Field Plant Pathology. Graduate course. Alternate summer semesters.

Sus Ag 600, Colloquium in Sustainable Agriculture. Graduate course. Fall and spring semesters.

Research Areas

Sustainable production of fruit, vegetable, and ornamental crops

Diversity and ecology of fungi in the sooty blotch and flyspeck complex on apple in the U.S. and worldwide

Development of best IPM practices for Midwest apple growers

Application of weather data measurements and model-based estimates to disease-warning systems

Epidemiology and management of bacterial wilt of cucurbits and its insect vectors

Ecology, resistance screening, and biogeography of the hosta petiole rot fungus, Sclerotium rolfsii var. delphinii

Development of an improved assay to detect the anthracnose fruit rot pathogen, Collectotrichum acutatum, on symptomless strawberry plants

Other Professional Positions and Activities

2005-2008: Education program for Amish and Mennonite growers of high-value crops in Iowa.  Workshops, field days, troubleshooting clinics, Resource Notebooks, and reference collections for Amish and Mennonite groups in eastern and souther Iowa.

2005-2008: Widening the road: Helping Iowa growers and agricultural professionals acquire innovations and collaborations from counterparts in Costa Rica.


Duttweiler, K.B., Sun, G., Batzer, J.C., Harrington, T.C., and Gleason, M.L. 2007. A RFLP-based technique for identifying fungi in the sooty blotch and flyspeck complex on apples. Plant Disease: Submitted. Zhang, R., Wang, Q., Sun, G.Y., Mao, Q., and Gleason, M.L. 2007. First report of race 3 of Bipolaris zeicola on corn in China. Plant Disease: Accepted.

Zhang, R., Wang, Q., Sun, G.Y., Mao, Q., and Gleason, M.L. 2007. First report of race 3 of Bipolaris zeicola on corn in China. Plant Disease: Accepted.

Xu, Z., Gleason, M.L., Mueller, D.S., Bradley, C.A., Buck, J.W., Benson, D.M., Esker, P.D., Dixon, P.M., and Monteiro, J.E.B.A. 2007. Overwintering of Sclerotium rolfsii and Sclerotium rolfsii var. delphinii in North Dakota, Iowa, North Carolina, and Georgia. Plant Disease: Submitted.

Sentelhas, P.C., Dalla Marta, A., Orlandini, S., Santos, E.A., Gillespie, T.J., and Gleason, M.L. 2007. Suitability of relative humidity as an estimator of leaf wetness duration. Agricultural and Forest Meteorology: Submitted.

Batzer, J.C., Gleason, M.L., Taylor, S.E., Koehler, K.J., and Monteiro, J. E. B. M. 2007. Spatial heterogeneity of leaf wetness duration in apple trees and its influence on performance of a warning system for sooty blotch and flyspeck. Plant Disease: Accepted pending revision.

Batzer, J.C., Díaz Arias, M.M., Harrington, T.C., Gleason, M.L., Groenevald, J.C., and Crous, P.W. 2007. Four species of Zygophiala (Schizothyriaceae, Capnodiales) are associated with the sooty blotch and flyspeck complex on apple. Mycologia: Accepted.

Yue, C., Jensen, H.H., Mueller, D.S., Nonnecke, G.R., Bonnet, D., and Gleason, M.L. 2007. Estimating consumers' valuation of organic and cosmetically damaged apples. HortScience:Accepted.

Sun, G., Zhang, Z., Zhang, M., Zhang, R., and Gleason, M.L. 2007. A new species of Dissoconium from China. Mycotaxon: Accepted.

Sentelhas, P.C., Gillespie, T.J., Gleason, M.L., Monteiro, J.E.B.M., Pezzopane, R.M., and Pedro, M.J., Jr. 2006. Evaluation of a Penman-Monteith approach to provide “standard” and crop leaf wetness duration estimates. Agricultural and Forest Meteorology 141:105-117.

Mueller, D.S., Gleason, M.L., Sisson, A.J., and Massman, J.M. 2006. Effect of row covers on suppression of bacterial wilt of muskmelon in Iowa. Plant Health Progress. doi: 10.1094/PHP-2006-1020-02-RS.

Sun, G., Zhang, M., Zhang, R., Ma, H., and Gleason, M.L. 2006. Wallemia – a genus newly recorded from China. Mycotaxon 95: 277-280.

Kim, K.-S., Taylor, S.E., and Gleason, M.L. 2006. Forecasting site-specific leaf wetness duration for input to disease-warning systems. Plant Disease 90:650-656.

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Department Highlights

Jacquelyn Jackson

Graduate Program: Interdepartmental Genetics

"Why did you choose Iowa State? I chose Iowa State because of the great programs it had to offer in my field of interest and because of the wonderful faculty I met while visiting the campus. I liked the atmosphere of the Plant Pathology Department and loved the campus and town. " Read More