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Corn Rootworm IPM

Regional Working Group

News

  • 2023 Iowa CRW Efficacy Evaluations

    2023 Iowa Evaluation of Insecticides and Plant-Incorporated Protectants

    In Iowa, the species of corn rootworm (CRW) that are of economic importance include western corn rootworm (Diabrotica virgifera virgifera LeConte) and northern corn rootworm (D. barberi Smith and Lawrence), and these two species are the most damaging pests of corn, Zea mays, in the United States Corn Belt. Over the last two decades, Bt corn varieties have been made commercially available to protect corn from these pests. 

    The goal of this research program is to serve the agricultural community of Iowa by monitoring and evaluating the performance of registered and precommercial insecticides and transgenic corn hybrids. To achieve this goal, we maintain a viable, proactive, progressive and scientifically sound product evaluation program.

  • Canada Bt Trait Table announcement

    2024 Canadian Bt Trait Tables

    The Canadian “Bt” Corn Trait Tables for 2024 are now available:

    English:  Canadian Bt Corn Trait Table for April 2024

    French:  Maïs exprimant des protéines insecticides disponibles au Canada (Avril 2024)

    Bt is in quotes because RNAi (RNA interference) technology, which is not a Bt trait, is now offered in some of the packages for rootworm protection. 

  • 2024 Handy Bt Trait Table

    2024 Handy Bt Trait Table (U.S.)

    This 2-page document list the types of Bt present in all commercialized corn in the U.S.A. in a concise format. It presents the trade names for traits, Bt event, protein(s) expressed, targeted insects and herbicide traits.

    Now in its 22nd year, the Trait Table for field corn has become the standard as an authoritative reference to Bt toxins in corn. Dr. Chris DiFonzo at Michigan State University is the author, and questions or comments should be directed to her. 

  • 2023 Regional Corn Rootworm Monitoring Network Summary page

    2023 Regional Corn Rootworm Monitoring Network Summary

    Western corn rootworm (WCR) and northern corn rootworm (NCR) continue to dominate as
    economic pests throughout the U.S. and Canada. Recently, high corn rootworm
    populations and the development of resistance to Bt corn hybrids in some areas has sparked
    greater interest in scouting and alternative management of corn rootworms. In response,
    the Corn Rootworm IPM Regional Working Group was formed during the spring of 2021
    and continues to grow. Currently, we are made up of university, industry, and government
    personnel from at least 11 U.S. states and 5 Canadian provinces.

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