BAYER CROPSCIENCE LP in the United States and Bayer CropScience Inc. in Canada have completed the purchase of Crompton Corporation's 50 percent share of the Gustafson seed treatment business in the United States, Canada and Mexico for $124 million in cash.

Bayer CropScience, which already held a 50 percent share of the U.S. and Canadian Gustafson joint ventures, now gains full ownership of Gustafson's NAFTA business as a result of the transaction.