Hot Pepper Wax Insect Repellent is a natural garden/greenhouse spray repellent and insecticide. It is proven effective against aphids, spider mites, whiteflies, cabbage loopers and beet armyworms for 2 weeks or longer. The chief active ingredient, CAPSAICIN, is an extract from cayenne pepper. It's harmless to humans - in fact, it's as edible as the sauce on barbecued Buffalo wings. For years, organic gardeners have experimented with hot-pepper home remedies against every pest, from aphids to squirrels. Hot Pepper Wax borrows from the best of their wisdom ... and takes it one step further.