BIFEN GRANULES 25#Bifen L P is a 0. 2% Bifenthrin professional sand based insecticide granule used for killing listed pests. Bifen L P can be used to treat not only residential, but institutional, public, commercial and industrial buildings, parks, recreational areas and athletic fields. Once Bifen L P is in the soil, it not only works as a killing method, but also as a prevention method. Provides long lasting residual. One application can protect your lawn areas for 2