Doktor Doom Spider Mite Knockout is a household pesticide that is effective against many household pests, such as Mealybug, bedbugs, fungus gnats, aphids and of course, Spidermites! Dr Doom Spidermite Knockout is available in an aerosol can with a special nozel for release in any orientation, making it easy to spray the can upside down on the underside of your plant foliage. Spidermite knockout can be used on ornamentals, Edibles, Trees, Shrubs, Evergreens, Succulents and houseplants.