Spray for control of powdery mildew on squash I have used a solution of milk, baking soda, and liquid dish detergent to effectively control powdery mildew in my own vegetable garden. Here is the spray recipe I use: Fill the 32 oz bottle with 1/2 c. of milk. Add 2 T. of baking soda. Fill sprayer with water & add one drop of liquid dish detergent. Mix contents well
Organic powdery mildew and black spot treatment! You will need; 1 gallon of warm water 3 Tablespoons Baking Soda 1 Tablespoon Murphys Oil Soap The simple recipe; Mix the Baking Soda and Murphys Oil soap in the warm water, stirring well. Spray the solution on both sides of the leaves as soon as you spot this disease. (Gray coating on the leaves or black spots on yellowing leaves).
Prevent powdery mildew with this spray: 1 gallon of water 1 tablespoon of baking soda 1 tablespoon of vegetable oil 1 tablespoon of dishwashing liquid Mix the ingredients together and add them to a spray bottle. Spray your plants weekly, preferably on overcast days to prevent it from burning the foliage.