The 3 Most Aggressive and Effective Ways for Eliminating ...
Jan 14, 2021· Three Ways for Eliminating Powdery Mildew. Apple cider vinegar. This is an old, trusted way to combat powdery mildew. Mix 2 teaspoons of apple cider vinegar (organic is best) per quart of clean water. Then spray the mixture onto your plants to help organically kill powdery mildew traces. Remove the infected plant.