I know some in the south and elsewhere have bentgrass as the grass of choice but up north its considered a weed in the lawns I maintain. Is there something that can be applied or someone can apply to kill only the bentgrass in amongst kentucky blue and fescues and ryes? It starts off slow and then invades everything. Only way so far that I have been able to control it is to kill it and start new. Any ideas? I want to start the season able to control it or at least tell the homeowners what to do.