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David Onstad

David Onstad

  • Affiliate Professor


  • B.S., Biology, California State University, Sacramento, 1979
  • M.S., Environmental Engineering, Cornell University, 1982
  • Ph.D., Entomology, Cornell University, 1985

Area of Expertise

  • Insect Resistance Management
  • Insect Epizootiology
  • Economics of IPM
  • Modeling of Insect Populations

More Information

Dr. David Onstad is an affiliate professor of entomology at Iowa State University and a senior research scientist at Corteva Agriscience in Johnston, IA. His research at Corteva focuses on predicting the evolution of resistance by pests to pesticidal traits in maize and soybean and to chemical pesticides. In the past he has also modeled the evolution of rotation-resistance by corn rootworm. He has modeled over 30 species of insects, pathogens, and crops, including the usual maize and soybean pests and pests of wheat, alfalfa, broccoli, apple and forest trees. He has also modeled predators, parasitoids, insect and plant pathogens, and honey bee colonies. He created and managed the Ecological Database of the World's Insect Pathogens. The second edition of his book, Insect Resistance Management: Biology, Economics and Prediction, was published in 2014. His new book, Economics of Integrated Pest Management of Insects, was published by CABI in 2019. He believes that great science depends on critical reviews of the literature, a full dose of scepticism, and a joy of exploring nature.