Michael McDermott, Global Business Leader DuPont Professional Products, in an open letter to turfgrass managers recently outlined steps the company is taking in response to claims its Imprelis herbicide for turfgrass is damaging and killing trees.

He wrote that DuPont Professional Products is:

engaging 20 independent, certified arborist companies to work with you and evaluate your claim.

launching a website,, to carry the latest information about Imprelis and make it easier for you to report problems. We urge you to go to the website for more information and to check back frequently for updates.

establishing a toll free hotline to take all reports of problems from lawn care professionals, property managers and owners, and golf courses, and to handle any questions and concerns. The hotline number is available on the imprelis- website.

continuing to work on this issue with the Environmental Protection Agency, state regulators and university extension specialists.

"I want to underscore DuPont’s commitment to our customers’ satisfaction and to responsible stewardship of our products. We sincerely regret any tree injuries that Imprelis may have caused, and will work with you to promptly and fairly resolve problems associated with our product," McDermott’s letter said

"Based on our ongoing review, we have observed tree injuries associated with Imprelis primarily on Norway spruce and white pine trees. The reports of problems are concentrated in a geographic band that includes Minnesota, Michigan, Indiana, Ohio, Pennsylvania, New Jersey and Wisconsin. While most properties treated have had successful weed control, we are committed to continuing to work with every customer who has experienced Imprelis-related problems," he continued.

"We ask for your cooperation while we work to rapidly address this matter and institute processes and procedures to remedy your situation. It is our goal to have a claims process set up as soon as possible," McDermott wrote.

He added that anybody having concerns or issues with Imprelis should contact DuPont Professional Products.