Recipe for an all-purpose organic pesticide May 22, 2020 · ahtss · In a jar, combine: 1 teaspoon of dishwashing liquid and 1 cup vegetable oil and a whole chilli Shake vigorously In an empty spray bottle, combine: 2 teaspoons of this mixture and 1 cup water Use at 10-day intervals (or more often if needed) to rid plants of whiteflies, mites, aphids, scale