I need to get rid of Poison ivy, that is growing in English ivy located under trees and growing up some trees. Has anyone dealt with this. I have Nufarms Horsepower and 4 speed xt, that both list Poison ivy as a weed controlled, but do not list English ivy. I do not want to damage the English ivy, but I am concerned more with damaging the surrounding trees and shrubs, that have roots growing below both ivies. I plan on cutting the poison ivy at the base of the trees. If needed I could purchase something different than the two listed above.