I've never had a problem with vinca wilting before untill a couple days ago. I've planted vinca numerous times in this bed and never had lost a single transplant to wilting. I am worried I introduced the phytophthora fungus that some of you have mentioned into one of my flower beds with one of the transplants perhaps. The transplants all looked healthy when I planted them about 3 or 4 weeks ago then the other day 2 of the plants located next to each other wilted in 1 day and they look dead. Today another one in the same general area is wilting as well. I was hoping it was just from the 114 degree weather but that wouldn't make sense because the part of the bed they are in gets nore afternoon shade than most of the other bed and the other vinca plants (approx 24 of them) look fine. These plants dying has ruined my color scheme so I need to replace them but if I do are they likely to sucumb to the wilt as well? Can I spray the rest of the bed with fungicide or will the heat cause it to damage the plants? The bed is mulched and on a dripline so the plants don't get overhead watering but if the spores are in the soil won't it just get into the root systems of all the plants?