I cut 5 inches out of the main vine. It goes 25 feet up an Austrian pine and twines all over top. It didn't even wilt. Does it get water through sucker hairs attached to pine? Can't cut it out. How do I kill it?
Virginia creeper does not have suckers that dig into the pine for moisture. How long ago did you cut it? Maybe there is another stem or a second type of vine climbing the tree. If the vine stem looks "hairy", as you say, it may be poison ivy and those hairs are air roots. The base of a large PI vine looks a lot like a tree trunk so is camouflaged. At the bottom of the article in this link, there is a photo of poison ivy hiding among Virginia creeper. This is a fairly common occurrence. https://wimastergardener.org/article/virginia-creeper-parthenocissus-quinquefolia/ When a vine is in a tree it is best to let it completely dry out after cutting and start to fall on its own before gently tugging on it to bring it down.