DRUG DESCRIPTION. PROSCAR (finasteride), a synthetic 4-azasteroid compound, is a specific inhibitor of steroid Type II 5Î±-reductase, an intracellular enzyme that converts the androgen testosterone into 5Î±- dihydrotestosterone (DHT). Finasteride is 4-azaandrost-1-ene-17-carboxamide, N-(1,1-dimethylethyl)-3-oxo-,(5Î±,17Ã)-.
1 The stronger and thicker you can get your lawn, the less chance violets will stand to spread. 2  Seed your lawn. 3  You can either over-seed during a core aeration or slice-seed areas to help them fill-in with new turfgrass.4  Stay on top of things. 5  It may take a couple years to really get a handle on a big crop of violets.ollow these basic principles to win the war on violets: 1  Use the right herbicides. 2  Create an environment that is best for your lawn. 3  Fill in the thin or bare areas. 4  Stay on top of things.
Prevent Scalping and Keep Blades Sharp. Cut down on sharp turns by turning the mower on the driveway instead of in the lawn. Scalping the lawn causes damage to the crowns of the plants. If youâve added fertilizer or another lawn application, avoid mowing for 24 hours.