Extension
HANDY Bt TRAIT TABLE
Created and updated annually by Dr. Chris DiFonzo with Michigan State University and Dr. Pat Porter with Texas A&M
Most corn hybrids planted in the U.S. have transgenic traits for insect management. The Handy Bt Trait Table provides a helpful list of trait names and details of specific trait packages to make it easier to understand and compare company seed guides, sales materials, and bag tags. Recent mergers resulted in name changes for several major seed companies. Trait packages are listed alphabetically, rather than by company name, to avoid having to frequently reorganize the table as the company mergers progress.
Bt resistance is arguably the most important issue facing growers planting Bt hybrids, as well as extension educators, independent crop scouts, and company agronomists responding to field calls. Problems continue to increase in regions where field failures were already found, and new cases of resistance are reported every season. The table thus has a column which lists the insect species for which resistance has occurred. The resistance problems may be local, regional, or widespread.
To view or download the current table and a list of Bt resistance citations, go directly to the Bt Trait Table web site, maintained by Dr. Porter Texas A&M.
For questions, comments, or complaints about the table, contact Dr. DiFonzo at difonzo@msu.edu.
FREE EXTENSION BULLETINS BY INSECT or CROP
Aphids
Armyworm
Barley
Blister beetle
Bt/ GM Crops
Cereal Leaf Beetle
Corn Blotch Leafminer
Corn Rootworm
- Rating Corn Rootworm Larval Damage: the 0 to 3 node-injury scale
- Managing western corn rootworm resistance to Bt on the Fringe
- Western corn rootworm adult-feeding on corn
Defoliators - Soybean
- What the h*#& is defoliating my soybeans?
- Silver-spotted skipper, a curiosity in soybean
Defoliators - Wheat
Fleahopper
Grass Sawfly
Grubs
- Identifying white grubs: No Its, Ands, or Butts
- Asiatic garden beetle in Michigan field crops
- Asiatic garden beetle, a new pest of corn, potato, & alfalfa in SW Michigan
Neonicotinoid Seed Treatments
Soybean Aphid
- Heavy soybean aphid infestations on early-season soybeans
- Soybean aphid management in Michigan
- Soybean aphid, a buckthorn bonanza
Spider Mite
- Rating infestations in soybean
- Rating infestations in corn
- Cheat sheet for miticides in Michigan field crops
Springtails
Stink Bugs
Western bean cutworm
- Identification and life cycle
- Milk jug trapping
- Realistic WBC moth identification from traps
- First confirmation of corn damage in Michigan (2007)
- First detection of WBC moth catch and larval feeding in Michigan (2006-2008)
- Helpful pictures from a heavily infested field
- Where are they now? Quick guide to WBC size and location on corn
- WBC in whorl (V10-14) stage corn
- Update on corn research from the 2010 season
- Managing WBC in field corn
- WBC damage to dry beans
- Managing WBC dry beans
- WBC in dry beans - Quick Recommendation sheet
- Update on dry bean research in the 2010 season