UPDATE 1-DuPont says has U.S. OK for new insecticide By: Reuters: Company News August 29, 2011 at 12:36 PM EDT NEW YORK, Aug 29 (Reuters) - DuPont said the U.S. Environmental Protection Agency has approved an insecticide that will fight above-ground pests only. Read More >> Related Stocks: Dow Chemical DuPont USA Monsanto Co Syngenta AG ADS