Fungicide Resistance Action Committee

Sterol Biosynthesis Inhibitors (SBI) Fungicides

NA-SBI working group of FRAC

The NA-SBI working group of the North American Fungicide Resistance Action Committee (NA-FRAC) was re-established in 2004 after the approval of new uses of existing SBI fungicides and the registration of new SBI fungicides in the United States. The SBI members including Bayer Crop Science, BASF, Dow AgroSciences, and Syngenta coordinates with the SBI international working group in the harmonization of resistance management guidelines. Resistance management for SBI fungicides are required and the risk of resistance of this group of fungicides is considered medium.

Contact People

Name Company Email Address
Gilberto Olaya Syngenta
Allison Tally Syngenta
David Ouimette Dow AgroSciences
George Musson Bayer Crop Science
Scott Walker BASF

General Recommendations

For general resistance management recommendations for SBI fungicides, see the global FRAC webpage: SBI Fungicides - General Use Recommendations.


Dr. Gilberto Olaya

Syngenta Crop Protection
7145 58th Avenue
Vero Beach, FL 32967

Phone: 772-794-7149