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Corn rootworms are important pests for this crop, especially the larvae that attach to the roots and can indirectly induce yield losses. Good integrated crop management reduces the risk of damage. In this video, you will be able to learn

The Canadian Bt Corn Trait Tables have been updated for April 2021. The tables list information about trade names, Bt proteins, refuge requirements, and more for products approved in Canada in French.

The Canadian Bt Corn Trait Tables have been updated for April 2021. The tables list information about trade names, Bt proteins, refuge requirements, and more for products approved in Canada. 

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.

The Handy Bt Trait Table provides a helpful list of trait names (below) and details of trait packages (over) to make it easier to understand company seed guides, sales materials, and bag tags.

A monitoring network was established this year to monitor corn rootworm adults in Iowa cornfields, similar to the moth trapping network we manage in the spring each year.

With several severe weather events in Iowa this month, reports of lodged corn are coming our way. Often times, a small part of the field is flattened and would be difficult to see from the edge.

Corn rootworm egg hatch in Iowa occurs from late May to the middle of June, with an average peak hatching date of June 6 in central Iowa. In 2020, the expected hatching date will be behind the average due to cool spring temperatures.

Today, with Ashley Dean and Angie Rieck-Hinz, I met Warren Pierson at FEEL to look for corn rootworm larvae. I predicted peak corn rootworm egg hatch for central Iowa this week based on accumulating degree days.

The latest version of the table is always posted at https://www.texasinsects.org/bt-corn-trait-table.html For questions & corrections: Ben Phillips, Michigan State University (phill406@msu.edu) Contributor: Pat Porter, Texas A&M University