Postdoctoral Scientists and Staff

Benjamin D Brenizer

Area of Expertise: 
Crop pest management
Research Associate I

I worked in Dr. Gassmann's lab for three and a half years while obtaining my B.S. in Animal Ecology. I then spent a year as an intern at DM Crop Research Group, where I gained valuable experience in raising corn rootworm, raising fall armyworm, helping with soil sampling, collecting adult corn rootworm from tent studies, doing stand counts in corn and soybeans, and assisting with planting and harvesting of research plots. Currently I work in Dr. Gassmann's lab rearing corn rootworm for researching Bt resistance.

Dr. Ram Shrestha

Postdoctoral Research Associate

My current research projects are focused on characterization of field-evolved Bt resistance in western corn rootworm (WCR) (Diabrotica virgifera virgifera). I am involved in monitoring and quantifying evolution of Bt-resistance and cross-resistance (for Cry3Bb1, mCry3A, and Cry34/35Ab) in WCR field populations from various locations in Iowa. We use single plant bioassays, seedling mat bioassays, diet bioassays and field experiments to measure Bt 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.

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