Dr. David W. Onstad

David's picture
Research Scientist,
Corteva Agriscience
Address: Corteva Agriscience, Johnston, IA 50131
Phone: 515-468-8638
Email(s): david.onstad@corteva.com, dwonstad@gmail.com


Appointment: Adjunct Faculty


  1. B.S. in Biological Science, California State University, Sacramento
  2. M.S. in Environmental Systems Engineering, Cornell University
  3. Ph.D. in Entomology, Cornell University (minor in plant pathology)


I work in Iowa at Corteva Agriscience where I create and analyze mathematical models to evaluate resistance management strategies for insect pests and plant pathogens. Before 2012, I was a professor at the University of Illinois where I taught applied ecology and focused on IPM. I have created models of more than 30 species of plants, insects, and diseases, including honey bees, predators, parasitoids, insect pathogens and plant diseases. I have performed research on alfalfa, maize, soybean, broccoli, apple orchards, woodlands, and a few other systems. I am Vice-President of the Plant-Insect Ecosystem Section of the Entomological Society of America and will become President in November 2020. The second edition of my book, Insect Resistance Management: biology, economics and prediction, was published by Academic Press in 2014. The third edition is in preparation. My latest book, The Economics of Integrated Pest Management of Insects, was co-edited with Phil Crain and published by CABI in 2019.

My long-term interests include promotion of entomology in museums, schools, universities, and many other facilities and institutions in society. I also expect to focus on forecasting how entomology and IPM should change to significantly contribute to society and agriculture as the world changes beyond 2040.


Entomology News at Nebraska

Breaking Entomological News...

  • Student working with a laptop for online degreeOnline students in the online Master's of Science (MS) degree program will benefit from a reduced credit-hour requirement and a reduced time requirement following changes by the UNL Graduate College and the Entomology Department. Starting next fall, students may earn an online MS degree for 30 credits, instead of 36 credits, under the Option B.  The new degree plan must be completed within five years, instead of 10 years.  More details about this change may be found on the IANR News website.
  • Dr. Gary Brewer
  • Dr. Gary Brewer, professor of Entomology has a new Push-Pull Strategy to manage Stable Flies.  These flies cause billions in economic losses for the US and the world. Brewer explains the Strategy on this YouTube Video. 
  • Annie KruegerAnnie Krueger, Ph.D. candidate in Entomology, was featured in the IANR Student Spotlight this week. Annie is from Stevensville, MD, and plans to graduate this August. She is mentored by Dr. Troy Anderson

  • Dr. Doug GolickDr. Doug Golick, associate professor of Entomology, received a $19,259 grant from the Nebraska Environmental Trust (NET) in April. He received one of 23 grants that were awarded to faculty at the University of Nebraska-Lincoln. Golick will study Milkweed as a teaching tool in the classroom. 
  • Dr. Autumn SmartThe Economics of Honey Bee (Hymenoptera: Apidae) Mgt. & Overwintering Strategies of Colonies Used to Pollinate Almonds,” co-authored by Dr. Autumn Smart, was chosen as a runner-up in the 2019-20 Readers' Choice Award for the Journal of Economic Entomology. Congratulations Autumn!
  • Matthew GreinerMS student Matt Greiner (mentored by Ana Vélez) was awarded 1st place in the student paper competition at the recent Ozark-Prairie SETAC meeting. The victory will provide him with funds to attend the national SETAC meeting in November. Way to go, Matthew!