So an update on this project. The area I sprayed under the trees in a very strong gly mixture died within days.
The fenceline area I sprayed with RM43 has mixed results. I mixed what I thought was a strong mix. Maybe 7-8 oz per gallon. Many of the vines and plants growing at the fence line are dead, and some of the privet have all their leaves dropped. However some of the privet looks as good as new with no browning. I tried to spray pretty heavy and used a couple tablespoons of dawn as surfactant. The privet that looks unaffected are bigger ones which I don’t know if I completely covered due to height. I thought I would at least see strong browning from stress.
Any ideas? I want this privet dead and not to come back. I’m going to cut it all down, but my ideas was to spray it with something that would kill it and prevent regrowth at the root level before I saw it down.