Bayer CropScience's Environmental Science division has made two appointments to its US industrial vegetation management (IVM) business following the acquisition of land management herbicide assets from DuPont. Norman Barclift has been named as head of marketing for the IVM business. He was previously general insect control product manager for Bayer's professional pest management business. David Spak has been appointed stewardship and development manager. He was previously product development manager for the Environmental Science business.