Re: JasonJ or anyone else
i haven't heard of MSMA, but also remember that you can aerate to make nices holes and re-seed with your brand of carpet grass, and in the early spring you can use plant killer while the carpet grass is still dormant(brown) and the fescue is already green. it will kill the broadleaf/green stuff and leave the dormant stuff alive. just a way i've helped bermuda takeover in fescue areas...

<br /><br />uh, just remember to use a chem that is absorbed thru the leaves, not roots. i think i used roundup. oops almost forgot to add: if you're trying to get carpetgrass seeded now, it probably won't be established enough to do this next spring. i'd give it at least 3-4mos of growth, and it may be too late in the year for your region?