Bayer CropScience has appointed Sandra Peterson as chairperson of the board of management. She replaces Friedrich Berschauer on October 1st. Ms Peterson has been head of Bayer Healthcare’s medical care division for the past five years. Professor Berschauer is to retire after 30 years at Bayer. He has led the division since 2004. Bayer has also appointed Achim Noack to the board of management, replacing Dr Wolfgang Welter on the same date.