Doktor Doom Spider Mite Knock Out Doktor DoomŪ Spider Mite Knock OutŪ is a .20% pyrethrin formula. This formula is 19 times stronger in active ingredient pyrethrin than any soap based insecticides and 10 times stronger than any formulations that contain Pyrethrin & Piperoynl Butoxide. Piperoynl Butoxide is a synergist which enhances the killing power of Pyrethrin and it is not approved for organic gardening. Unlike soap based products which need to be applied liberally to the plant in order to drown the insects Doktor DoomŪ Spider Mite Knock OutŪ kills the pests on contact with just a light misting on the foliage. Apply the Doktor DoomŪ Spider Mite Knock OutŪ to the underside of the leaves and then fog the room with a Doktor DoomŪ Fogger. The smell of Pyrethrin flushes out and eradicates insect pests on contact. EPA Reg. No. 2724-568-72804. Not for sale in ND and PR at this time.