MSU Weed Science - Department of Crop and Soil Sciences
Jun 27th, 2016

Field Crops Entomology Program
Michigan State University

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For MSU weed control information, visit our sister site, MSUWEEDS.COM
For regional field crops information, visit Purdue's Chat 'n Chew Cafe

Handy Bt Corn Trait Table - updated for 2016

Keep track of Bt corn traits, efficacy, and refuge requirements for this season by printing or downloading the HANDY Bt TRAIT TABLE, updated in April 2016. Note that there are two versions of the table, one for the northern corn belt (green-shaded area) and another for the southern cotton region (white-shaded area), which differ in refuge requirements.

Choose the version:    NORTHERN corn belt       *****      SOUTHERN cotton-region

For general questions about the bulletin, specific questions about requirements in the corn belt, or corrections to the table, contact Chris DiFonzo with Michigan State University ( Contact Chris as well for permission and assistance in reprinting the bulletin with your university or company logo, or as an insert in a trade publication. For specific questions about requirements in the southern USA, contact Pat Porter with Texas A&M (

Free neonicotinoid seed treatment bulletin

Neonicotinoid seed treatments are applied to more than 80% of corn, and 40% of soybean, acres in the United States. Soybean entomologists from 12 different universities recently prepared a bulletin discussing the efficacy of neonic seed treatments and where they provide the most benefit. The bulletin also discusses some of the risks (off-target movement in soil and water, impacts on natural enemies and other non-targets) of widespread neonic use. This bulletin is free and can be downloaded as a pdf by clicking on the following: Effectiveness of neonicotinoid seed treatments in soybean