tenfingergrip wrote:Best way to kill them is to cut the trunk (all the way if you can and aren't afraid of the drift of the moisture from the sap) and then spray with Garlon, Arsenal or Round-up. All of these are systemic, meaning they will attack and kill the roots. Each one, if sprayed on the leaves will also intake the herbicide thru absorption during photosynthesis and will kill the root and obviously the plant. One of the problems with poison ivey is that the leaves are slick and the herbicides have a tendency to run off and are less effective than if a basal stump application were administered. A suffactant added to the herbicide mixture aids in the adhesion of the chemicals to the leaf.
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