FungusClear Ultra has systemic protection and control of blackspot, powdery mildew and rust Next generation active ingredient, exclusive to Evergreen Garden Care. Systemic protection and control of blackspot, powdery mildew and rust. Use on roses and other flowering or ornamental plants. Protects new growth, protects plants for over 4 months - with a programme of 5 applications, protection can last up to 4 months (5 months against blackspot and rust on roses).