Safer® brand garden fungicide controls and prevents the spread of fungal diseases, including powdery mildew, black spot, leaf spot and rust, in plants. Simply mix this economical concentrate with water as directed to make up to 4 gal of solution. Garden Fungicide works to create an environment that is not optimal for the fungus to grow and spread, therefore stopping the disease from further attacking the plant. Protect your flowers, foliage, ornamentals, fruits and vegetables from fungus up until the day before harvest.