The Phenylamide (PA) working group was formed in 1982 and held annual meetings until 1997. In 1999, the FRAC Steering committee decided to transform the working group to an expert forum. It was also decided to organise group meetings only on request and if more than one member company wishes to meet. The PA-FRAC Expert Forum represents an information desk for subjects related to phenylamide resistance and product performance; it is handled by the present chairman, Dr. Dietrich Hermann, Syngenta. Information on product performance, infringements of use recommendations and sensitivity of field populations are collected by the chairman and made available through the FRAC website.

The Expert Forum is comprised of the following members:

Member Organisation
Helge Sierotzki (Chair) Syngenta Crop Protection AG, Stein, Switzerland (Chair)
Laura Tazzi Isagro S.p.A., Milano, Italy
Federico Simonetta Isagro S.p.A., Milano, Italy
Christoph Andreas Braun Bayer Crop Science, Monheim, Germany



Dr. Helge Sierotzki

Syngenta Crop Protection Münchwilen AG
CH-4332 Stein

Tel : +41 62 866 01 80
Fax: +41 62 866 07 63

E-Mail: Dr. Helge Sierotzki