Los Angeles county authorities have banned all use of notorious weed killer glyphosate – the herbicide better known by its Monsanto/Bayer trade name, Roundup – after a second court ruling linking it to a man’s cancer.

“I am asking county departments to stop the use of this herbicide until public health and environmental professionals can determine if it’s safe for further use in L.A. County and explore alternative methods for vegetation management,” Kathryn Barger of the Los Angeles County Board of Supervisors said.