Stephen Thompson

Area of Expertise: 
Insect Resistance Management
M.S. in Entomology from Iowa State University

I am characterizing the genetics of western corn rootworm strains that have been selected for survival on maize expressing the Cry34/35Ab1 insecticidal proteins.  I also work full time for DuPont-Pioneer.

Dr. Jennifer Maxwell

Area of Expertise: 
Insect Resistance Management and Insect Pathology
Postdoctoral Research Associate

During her time as a postdoctoral scientist at Iowa State University, Dr. Maxwell studied a diversity of topics, including fitness costs of Bt resistance in western corn rootworm and European corn borer, tritrophic interactions among soil-borne entomopathogens, corn and western corn rootworm, and the application of integrated refuges and Bt pyramids to manage the evolution of resistance.

Patrick Weber

Agricultural Specialist III

I conduct field trials testing both commercial and pre-commercial products for management of insect pests of corn.  Much of my work focuses on western and northern corn rootworm, but I also have studied products targeting corn earworm, European corn borer, fall armyworm, seedcorn maggot and wireworm.  I conduct trials on Iowa State University Research farms and in farmers' fields.


Clifton, E. H., Jaronski, S. T., Hodgson, E. W. and Gassmann, A. J.  In Press.  Abundance of soil-borne entomopathogenic fungi in organic and conventional fields in the Midwestern USA with an emphasis on the effect of herbicides and fungicides on fungal persistence.  PLoS ONE.

Ingber, D. A. and Gassmann, A. J.  In Press.  Inheritance and fitness costs of resistance to Cry3Bb1 corn by western corn rootworm (Coleoptera: Chrysomelidae).  Journal of Economic Entomology. Read more about Publications

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