Simazine - Chemryt

Simazine is a selective pre-emergent herbicides used to control a wide variety of annual and perennial grasses and broadleaf weeds.Simazine has also been used to control weeds on turfgrass and as a non-selective form of weed control when used at higher rates on industrial sites.

When bermudagrass is mostly dormant, you can apply non-selective herbicides like glyphosate or glufosinate . 

Simazine or flumioxazin will also offer post control of annual bluegrass

simazine and all other soil active herbicides are watered in within 48 hours of application in a way that does not cause movement off site or past target zone in soil.

Chemical Name - Simazine
Mol Weight - 201.66
Smiles - CCNc1nc(Cl)nc(NCC)n1