Chemical Grubbing for Control of Exotic Wisteria

A stump treatment was applied to the cut stubs of Chinese wisteria (Wisteria sinensis Sweet). Three herbicides, applied full strength, and a cut treatment were selected for trial and each treatment replicated 10 times: AMS [ammonium sulfamate] 95% soluble crystal (Ammate), isopropylamine salt of glyphosate [N-(phosphonomethyl) glycine] 480 g/L (Roundup), and fosamine ammonium [ammonium ethyl carbamoylphosphonate] 480 g/L (Krenite). Final evaluation was made one year after treatment, but evaluation at ten months after treatment would have been satisfactory. All three herbicides were effective.