Safer Brand Insect Killing Soap is a 16 oz. concentrate that effectively kills a variety of insect pests such as aphids, whiteflies and mealybugs by weakening their protective outer shell using potassium salts of fatty acids. It can be applied every 7-10 days when insects are present or as needed to prevent further damage. One container makes 6 gallons of protection for your garden and it is a contact killer, so multiple applications may be needed for full control. To avoid wilting or browning of leaves, it should not be used during peak hours of the day or when temperatures exceed 90 degrees F. The product breaks down into natural elements within 7-10 days and does not persist in the environment.