Preen and birds

Asked July 4, 2019, 9:42 AM EDT safe to leave Preen out on a plowed field to prevent weeds from growing? Will it harm birds or pets?

Livingston County Illinois

1 Response

Thank you for your question. There are several formulations sold under the Preen label, and some are less concerning than others. The least concerning is corn gluten ( The formulations with the active ingredient trifluralin are described in this article: You can scroll to the bottom to read about toxicity to the animals you are concerned about. By reading the label of the Preen product, you can lean whether there are other active ingredients. I hope this is helpful.