A simple soap-oil spray formula recommended by the University of Hawaii College of Tropical Agriculture and Human Resources (CTAHR) is useful for controlling aphids, mealybugs, whiteflies, scale and citrus blackfly. Aphids Aphids are very small insects with soft bodies that live off the sap in plant leaves. They’re black, green, brown and pink or absentContinue reading “Soap-Oil Spray for Common Garden Pests of Hawaii”