herbicide

"Pesticides and herbicides are designed to alter biological systems," said Eugene Lengerich, emeritus professor of public health sciences at Penn State and senior author on the paper.

He could have been a better player but he played with "fear", a herbicide that stops athletes growing.

Paraquat is a herbicide commonly used on farms and in yards for weed control.

Williams was diagnosed with prostate cancer in 2015, he suspects, because of his exposure to Agent Orange, a herbicide used by the U.S. military to reduce enemy cover in the Vietnamese jungle.

Vigilance and quick action are especially important here because Bifano only uses organic control methods, so no chemical pesticides or herbicides.