Kopa™ insecticidal soap is a potassium salt of fatty acid soap that controls insects, mites and powdery mildew. Kopa can be used for organic production. KOPA INSECTICIDAL SOAP will control powdery mildew and listed insect pests such as: adelgids (woolly aphids), aphids, lacebugs, mealybugs, mites, leafhoppers, scale insects, plant bugs, sawfly larvae (e.g. pear and rose slugs), psyllids, tent caterpillars, spider mites, earwigs, whitefly.