DuPont (DD) is sending dozens of inspectors to make sure that farmers in Canada (and next year in the U.S.) aren't violating sales contracts by illegally saving the firm's Roundup Ready GM seeds for replanting in the following season. "Everyone always goes to the idea that we are trying to intimidate people and nothing could be further from the truth," says Dennis Birtles of enforcement company Agro Protection. "We are trying to create deterrence." But not by intimidation