Kansas.com Spray every 10 to 14 days with tebuconazole (Bayer Disease Control for Roses, Flowers and Shrubs), myclobutanil (Immunox, Immunox Plus), triforine (Ortho RosePride Disease Control), or chlorothalonil (Broad Spectrum Fungicide, Garden Disease Control, ...
Gainesville Times If the disease is severe enough to warrant the use of fungicides, be sure the spray equipment can provide good coverage. Effective fungicides for dogwood powdery mildew control include myclobutanil and propiconazole . Some control can be obtained with ...