Happy Spring! Our house will soon be covered with Engelmann Ivy--but for the last few years I've noticed that after a beautiful start, the leaves begin to show signs of a dark, rusty red spot which eventually turns nasty brown and kills the entire leaf. I'm thinking of trying Infuse Systemic Disease Control (a Bonide product) Active Ingredient: Propiconazole. This is a liquid that I'm to mix with water and spray of the plant--good luck getting the second storey covered. My concern is -- should I try something else first? Any advice?