Remove and discard infected leaves, stems, and plant debris
Prune plants to improve airflow and reduce humidity
Water at the base of plants, not on the leaves
Water early in the day so foliage dries quickly
Avoid overcrowding plants
Apply a fungicide labeled for powdery mildew
Use neem oil as directed on the product label
Spray with a baking soda solution if appropriate for the plant
Use sulfur-based treatments if suitable for the crop
Disinfect pruning tools after use
Remove severely infected plants if the infection is widespread
Choose powdery mildew-resistant plant varieties
Keep weeds under control around plants
Avoid excess nitrogen fertilizer
Monitor plants regularly and treat at the first sign of infection