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.
1 Water your new lawn to keep it moist for a period of 2 weeks or until sod is rooted. ( 2 Do not waste water by over watering!). 3  Mow as soon as your new lawn is rooted-at the recommended height (see table below) - Or mow in 3-5 weeks when height is 2-3 inches (weeds and/or grass).4  Fertilize your lawn once rooted.oysia is a very invasive grass once it is established and is in fact as hard to eliminate as bermuda grass. For those who wish to remove it the above link offers some advice. Below is a link to an extension web site on how to kill Bermuda grass. Similar advice and techniques apply to killing Zoysia.