DuPont is taking heat again over its handling of the now-banned Imprelis herbicide. handled A broadleaf herbicide originally touted as safe for other plants, Imprelis has been linked to a growing number of tree deaths and damages, especially evergreens.

Arguments are scheduled for September 20th in U.S. District Court in Delaware. concerning a motion to mandate DuPont advise property owners and lawn care professionals who purchased Imprelis and what they need to do to ensure appropriate preservation of tree damage evidence, according to  the Miami Herald.

The  motion was filed by a group of law firms representing Imprelis victims, and followed a letter DuPont sent to lawn care professionals and golf course superintendents last week, said the Miami Herald. According to DuPont’s global business leader of Professional Products, Michael McDermott, the company stated in its letter that it would email details about the claims process yesterday. McDermott advised those addressed in the letter to provide “information about any possible Imprelis-related damage on your or your customers’ properties,” reported the Miami Herald.

Imprelis was banned earlier this month by the U.S. Environmental Protection Agency (EPA) after DuPont data confirmed that some specific coniferous trees—Norway spruce, white pine, and balsam fir—were vulnerable to damage or death by Imprelis application. Imprelis was only recently approved by the EPA less than a year ago and was meant to be an environmentally safe alternative for controlling broadleaf weeds, explained

At least 18 Imprelis lawsuits are pending in federal courts in Delaware, Indiana, Iowa, Kansas, Minnesota, New Jersey, Ohio, Pennsylvania, Utah, and Wisconsin and the U.S. Judicial Panel on Multidistrict Litigation just announced it will be convening a hearing next month to consider consolidation of Imprelis lawsuits in one federal court.

The national law firm of Parker Waichman Alonso LLP has filed about one dozen Imprelis lawsuits in several Midwestern states.