The Safer Brand Insect Killing Soap utilizes the power of potassium salts of fatty acids (insecticidal soap). The potassium salts weaken the insect’s waxy protective outer shell. Apply every 5-7 days when insects are present or as needed to prevent further damage. Safer Brand's Insecticidal Soap is ideal for aphid control and mealybug control, as it will dehydrate the insect by breaking down its waxy membrane. This OMRI-listed and compliant for use in organic gardening pest control formula kills a variety of insect pests but is gentle on plants.