Deb writes
While Invader HPX probably will kill sewer flies, it is must be used only in cracks, crevices and wall voids which will most likely severely limit the contact these annoying flies can make with the application. We recommend using a pyrethrin spray such as CB-80. CB -80 can be used as both a space spray and a crack and crevice spray, making it much more effective for sewer fly control. You will also most likely need DF5000 to treat directly in drains where these flies breed and develop.
Answer last updated on: 07/06/2010
