Canadian Corn Pest Coalition News Release April 27, 2023 In the fall of 2022, a European corn borer (ECB) population was collected near Truro, Nova Scotia near a field where a Cry1F-resistant ECB population was collected in 2018. Based on bioassay tests conducted by Drs. Jocelyn Smith and Yasmin Farhan at the University of Guelph, […]
The Canadian Bt Corn Trait Tables have been updated for March 2023. These tables include all registered Bt Corn Trait Packages and indicates which Bt proteins and herbicide tolerant traits they contain and pests they target. These tables also include known resistance status for each pest and Bt protein. English: Canadian Bt Corn Trait Table […]
The Canadian Bt Corn Trait Tables have been updated for April 2021. English: Canadian Bt Corn Trait Table for April 2021 French: Maïs Bt disponibles au Canada (Avril 2021) For information on which hybrids or products have obtained EU approval, visit the Canadian Seed Trade Association’s corn hybrid database at: https://seedinnovation.ca/hybrid/ Pour plus d’informations sur les hybrides […]
Over the last few years a number of corn insect pest populations have developed resistance to at least one Bt trait used in corn hybrids. From western bean cutworm (WBC) resistance to Cry1F, corn earworm (CEW) resistance reported to Cry1Ab, Cry1A.105 and Cry2Ab2, to the latest confirmation of European corn borer (ECB) resistance to Cry1F […]
Author: Jocelyn Smith, University of Guelph, Ridgetown Campus Growers in the high WBC risk areas (sandy soils) saw heavy infestations of WBC in 2013 and many were surprised by the survival and amount of damage by WBC on Bt corn. Bt corn hybrids that express the Cry 1F insecticidal protein such as the Herculex® and […]
Many questions are starting to come in regarding WBC. Just to help clarify what the action thresholds for western bean cutworm are, here is a quick summary: In Corn: Scout 10 plants in a row in 10 areas of the field. In non-Bt corn or transgenic corn that does not provide any protection against WBC […]
There are a few fields in the Bothwell/Cairo area that are already above threshold for western bean cutworm. The fields we are finding most of the eggs in are those that are the most advanced in growth stage for that area. The fields we have found eggs in so far have all been transgenic […]
Thanks for the Heads-up Bob Buis! Bob reports that he has seen a field with 5% of the plants cut by cutworm in the Lighthouse Cove (Tilbury) area. Cutting indicates that the cutworm larvae are bigger and more mature and may be difficult to control. Now that corn fields are emerging, they need to be scouted every […]