Australian and New Zealand Gardening: Help Rid Arcanthus., 1 by SpeciesNut

SpeciesNut wrote:
Hello Leslie.Acanthus is very hardy and can take a lot of punishment. If you use the glycosphate (roundup) straight. Cut the top off each plant just above ground level and use this undiluted on a small artists paint brush. Put it on the cut surface before the sap can run or set. It must be done one plant at a time so they don,t dry before poisoning. I have found this will kill most plants that show resistance to the poison sprayed on the foliage.