Duke’s Root Control continually researches the most effective products available. RazoRooter® II is the only diquat-based herbicide registered by the U.S. Environmental Protection Agency (EPA) for the removal of nuisance tree roots in sanitary sewer line collection systems and received a classification of “evidence of non-carcinogenicity for humans” (USEPA Diquat R.E.D. Facts, July 1995). Most notably, in 2014 the EPA further approved an amendment of Duke’s diquat dibromide labels to lower the signal word from “warning” to “caution”.
Tree roots are killed on contact inside and outside pipe walls, and the thick herbicidal foam penetrates through wye connections to kill roots in lateral lines. RazoRooter® II does not harm trees and other above ground vegetation, and disruption to residents and businesses is minimal.