Safer Brand 16 oz. Concentrate Insect Killing Soap kills a variety of insect pests including aphids whiteflies and mealybugs. Safer Brand Insect Killing Soap utilizes the power of potassium salts of fatty acids to weaken the insect s waxy protective outer shell. Apply every 7-10 days when insects are present or as needed to prevent further damage. This 16 fl oz container will make 6 gal of protection for your garden. Since Safer Brand insect killing soap is a contact killer several applications may be needed for full control. As a general rule much like watering do not use these products in the peak of the day or when temperatures exceed 90 degrees F to avoid wilting or browning of the leaves. It breaks down into their natural elements within 7-10 days and will not persist in the environment.