No offense to TomotoLord, but I totally disagree with his statement to
"first pull what you can". All this is going to do is make the situation
worse for you.

I have posted a picture on my domain at http://daylily.net/ebay/nutgrass.gif
that shows you the basic plant structure of nutgrass. If you pull the
emerged shoot then in most instances the main "nut" for that shoot will
remain in the soil. But even worse, you will be ripping it free from the
very thin tuborous roots that all the new nuts are growing on. All these
nuts that are left behind will then mature and start sending up shoots and
will develop even more elaborate tuborous systems and more nuts.

If you spray the emerged shoots without pulling the nutgrass grass, then
the chemical will find its why to the entire root system and will kill those
young nuts.

Pulling nutgrass will only make the situation worse in the long run. The
sooner you start addressing the situation properly, the sooner you will
resolve your problem, and the less money you will spend.

As far as mowing the nutgrass... it is advised to not cut it two days before
spraying and two days after spraying with Manage.

Bobby Baxter
http://thegardensite.com