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Jesse Haarmann

Botany and Plant Pathology 

  • Graduate Research Assistant

Jesse Haarmann is a 1st year Ph.D. student with Dr. Bill Johnson. He grew up in Effingham, Illinois on a corn, soybean, and hog farm. He completed a B.S. in Crop Science from the University of Illinois Urbana-Champaign in 2017, and an M.S. in Weed Science from Purdue University in 2019. Jesse’s Master’s thesis sought to identify how to maximize weed control with a sequential herbicide application in the situation of unsatisfactory control from the first POST contact herbicide application by looking at different application timings and POST herbicides. For his Ph.D. project, he will be studying PPO-inhibiting herbicides including a new PPO-inhibiting herbicide called trifludimoxazin that controls PPO inhibitor resistant weed biotypes. The goals of Jesse’s research project are to understand the mechanism by which this new herbicide controls PPO inhibitor resistant weeds as well as how the two different PPO isoenzymes contribute the PPO-inhibiting herbicide family’s mechanism of action.

Expected graduation: May 2022.

Botany and Plant Pathology, 915 West State Street, West Lafayette, IN 47907 USA, (765) 494-4614

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