List of Homemade Organic Recipes - List of Homemade Organic Recipes Homemade Horticultural Oil spray recipe 1 tablespoon vegetable cooking oil and 1 teaspoon of NON-DEGREASING liquid dishwashing detergent per gallon of water Potassium bicarbonate Fungicide Mix 4 teaspoons (about 1 rounded tablespoon) of potassium bicarbonate into one gallon of water. Spray lightly on foliage of plants afflicted with black spot, powdery mildew, brown patch and other fungal diseases. Potassium bicarbonate is a
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