Go to Yardener's Tool Shed for examples of these products found in independent garden centers. Go to Disease Control Products
Control With Actinovate
Baking soda (sodium bicarbonate) has been found to control powdery mildew and other mildews when sprayed on plants at weekly intervals in a solution of 1 level teaspoonful to 2 quarts of water.
Go to the Yardener's Tool Shed to check out Baking Soda Products
Control with Neem
Neem extracts have long served as natural botanical pesticides and repellents in India. They contain neem, derived from seeds of the neem tree which grows in India and elsewhere in the tropics. Sprayed on plant foliage, Azadirachtin, the versatile active ingredient, also acts as a fungicide in many situations. Look for Neem based fungicides in the Natural Fungicide section of Yardener's Tool Shed
Control with Sulfur
A single fungicide will not control all fungal diseases. Fortunately, your landscape will not experience many different fungal diseases. All yardeners should have a sulfur-based fungicide on the shelf, because it does control several common diseases, including black spot on roses, other leaf spots, anthracnose, powdery mildew, scab, and rusts on many kinds of fruits, vegetables, flowers, shrubs, and trees. Sulfur does not affect soil fungi. It has been used against plant diseases for thousands of years. It is available as a fine yellow wettable powder to be dusted on plant foliage or as a concentrated liquid to be diluted in water and sprayed.
A related product, lime sulfur, is useful as a dormant spray or as a dust according to directions on the package label. Neither the spray nor the dust should be used when temperatures are higher than 80° F. Do not spray shrubs or trees when they are flowering. Lime sulfur will stain buildings, walls, and trellises.