U.S. court blocks sales of Bayer weed killer in United States

(Reuters) - A U.S. appeals court has blocked Bayer AG from selling an agricultural weed killer in the United States, the latest setback for a business already fighting an expensive legal battle over another product.A three-judge panel of the 9th U.S. Circuit Court of Appeals ruled the U.S. Environmental Protection Agency substantially understated the risks related to the use of dicamba, a chemical found in herbicides sold by Bayer and rivals that are sprayed on genetically engineered soybeans..