Suppression of Japanese knotweed with glyphosate or triclopyr following cutting or applied sequentially

We compared treating twice or cutting followed by treatment using glyphosate or triclopyr for suppression of Japanese knotweed (Fallopia japonica) compared to cutting twice and a control. Herbicide treatments provided significant suppression, and there was no difference between herbicides. This was unusual, as glyphosate is typically more effective than triclopyr.