|Help! I have a beautiful and thriving Grape Ivy plant hanging in a basket by a window. Of late, I've notice that all of the new shoots and leaves unfold covered within a thin layer of a downy white powder, kind of like dust, that can be wiped off, but which also seems to kill the new growth. It just turns brown and dries up. Strangely, this powdery substance isn't on any of the old leaves which are in fine shape. I'm concerned, however, that none of the new growth actually survives and that the plant will die. I feed it every two weeks with Mircale-Gro. Any ideas about what it might be or what I can do? Does it need a new pot or soil? I've been pruning all of the dead new growth off, but it doesn't seem to help.