APPLIED ECONOMICS AND POLICY


Too much of a good thing: Lessons from compromised rootworm Bt maize in the U.S.


JINHUA ZHAO PROFESSOR


DAVID J. NOLAN DEAN Charles H. Dyson School


of Applied Economics and Management Cornell SC Johnson College of Business Cornell University


Co-authors • Jinhua Zhao Professor, David J. Nolan Dean, Charles H. Dyson School of Applied


Economics and Management, Cornell SC Johnson College of Business, Cornell University


• Christina DiFonzo, Michigan State University, East Lansing, MI • Ziwei Ye, School of Agricultural Economics and Rural Development, Renmin University, Beijing, China


• David A. Hennessy, Iowa State University, Ames, IA • Felicia Wu, Michigan State University, East Lansing, MI • Sean P. Conley, University of Wisconsin, Madison, WI • Aaron J. Gassmann, Iowa State University, Ames, IA • Erin W. Hodgson, Iowa State University, Ames, IA • Bryan Jensen, University of Wisconsin, Madison, WI • Janet J. Knodel, North Dakota State University, Fargo, ND • Bradley McManus, South Dakota State University, Brookings, SD • Lance J. Meinke, University of Nebraska, Lincoln, NE • Andrew Michel, Te Ohio State University, Wooster, OH • Bruce Potter, University of Minnesota, Lamberton, MN • Nicholas J. Seiter, University of Illinois, Urbana-Champaign, IL • Jocelyn L. Smith, University of Guelph, Ridgetown, ON, Canada • Joseph L. Spencer, University of Illinois, Urbana-Champaign, IL • Kelly J. Tilmon, Te Ohio State University, Wooster, OH • Robert J. Wright, University of Nebraska, Lincoln, NE • Christian H. Krupke, Purdue University, West Lafayette, IN


Summary Pest resistance is one of the major traits introduced into genetically modified


crops, which can reduce the need for chemical pesticides. When planted over entire landscapes, genetically-modified crops’ effectiveness declines, how- ever, and the cost-benefit ratio shifts as pests develop resistance. Te authors investigated how farmers’ choices to plant more than the optimum amount of Bt maize across the US corn belt suggests misperceptions of the costs and benefits.


CONTENTS TO MAIN | RESEARCH WITH IMPACT: CORNELL SC JOHNSON COLLEGE OF BUSINESS • 2025 EDITION 20


Corn Belt Science, 387, 6737, February 2025 LINK TO PAPER


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