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Corn Rootworm IPM

Regional Working Group


  • 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.

  • 2023 Ontario Summary

    2023 Ontario Corn Rootworm Trap Network Report

    Results from the 2023 Ontario corn rootworm (CRW) trap sites monitored through the Adult Corn Rootworm (CRW) Trap Monitoring Network have been summarized in the infographic below. Thank you to all the trap participants for monitoring their traps this year. These sites are helping us to identify fields and counties with potential resistant corn rootworm populations and understand the rootworm risk for 2024 in continuous corn fields. A big thanks to Dan Bihari, Senior GIS Specialist, OMAFRA for developing and maintaining the trap network site and to our sponsors including Grain Farmers of Ontario (GFO), Agricultural Biotechnology Stewardship Technical Committee (ABSTC) and OMAFRA for funding trap supplies.

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