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.
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.
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.
Keweshan, R. S., Head, G. P., and Gassmann, A. J. In Press. Effects of pyramided Bt corn and blended refuges on western corn rootworm and northern corn rootworm (Coleoptera: Chrysomelidae). Journal of Economic Entomology.
Deitloff, J., Dunbar, M. W., Ingber, D. A., Hibbard, B. E., and Gassmann, A. J. In Press. Effects of refuges on the evolution of resistance to transgenic corn by western corn rootworm. Pest Management Science. Read more about Publications