>>1880273Here's the whole plant for reference. The hanging vine is the oldest and longest, and is sprouting from the old cutting, which is now basically a still attached stick. The vine pictured on the right here is the healthiest vine and has very little damage. The left vine seems to have the worst of the infestation currently; the oldest vine has lost more leaves overall but hangs down now and thus isn't exposed to the flies anymore, hence why I think it's them.