Oh! Thought you ment you caught it!!
Well! now the only thing I've tried is, Weed-B-Gone!
It kills poison Ivy, poison oak and all kinds of weeds, but, if you read the lable carefully it will kill plants and flowers if the wind blows the mist on them while your spraying around.
It does kill everything. I've found that in a couple of years the poison ivy will come back in small patches but you just respray and that will kill it.
I tried to clear it all out by weed wacking! Not a good idea!
Later,
CEP