poison oak

[droy]

I had some on my trees similiar to yours, I tried spraying a combination of Roundup & 2-4d (4- oz. of each per gal. of water)they had spread too high into the branches, to do any good just spraying a pestiside, & even if I did reach that high, I'd also harm the oak branches & leaves. After a few trys, & no success, I VERY carefully cut the vines about 3 feet above the ground with some pruning shears. After cutting them through, I then painted the "root side" with straight 2-4d, (especially the fresh cut !) all the way to the ground. That did the trick for me, the vine going up into the tree, just naturally died after being separated from it's roots. Whatever you do, DO NOT BURN poison oak, ivy, sumac, etc.!!!!!!!!! I personally know of two people, who like myself, are very reactive to those plants, they accidentally breathed the smoke of burning poison oak, & it got into their lungs--VERY BAD DEAL; one fellow stayed in the hospital for right at three mos., & to quote the doctor, "he like to bought the farm". I'd even read of a sickly neighbor getting a dose when the wind was right. Good Luck with your project.