Naturally made with pyrethrum, this fogger biologically breaks down in a couple of hours thus providing very fast re-entry times to fumigated areas. They really do not have a strong odor, which also provides the homeowner with a peace of mind as there are no long lasting obnoxious odors lingering in the air; if used in conjunction with Doktor Doom Residual Products will provide the Homeowner with a bug free environment. Use the fumigants first to flush out and eradicate the insects and then follow up with the Residuals to prevent further enter of pests into your home or gardening environment.