What Chemicals Are In Preen?
What Chemicals Are In Preen? What chemicals are in preen? The active ingredient in Preen is trifluralin, a pre- emergent herbicide. What is the main ingredient in Preen? The active ingredient in Preen is trifluralin. It is a suspected carcinogen, and is toxic to fish and aquatic life, and earthworms. Does Preen have chemicals in