SALEM, Ore. (AP) — The agency overseeing Oregon's legal medical marijuana industry conceded in a report Thursday it has not provided effective oversight of growers and others in the industry, creating opportunities for weed to be diverted to the black market. The blunt internal review echoes complaints from federal authorities that Oregon hasn't adequately controlled its marijuana businesses, and that overproduction of pot is feeding a black market in states that haven't legalized it. Oregon was one of the first states to legalize medical marijuana in 1998, and in 2014 voters approved allowing recreational use.