Once you put the chemical fungicide down, you cannot use cornmeal for many weeks. The cornmeal depends on a fungus already living in the soil, but the chemical fungicide will knock it out. The beneficial fungi will return, but until they do the cornmeal won't do anything but fertilize.

I panicked. When I went to get some alfalfa pellets the feed store was out of corn meal so I used what I had on hand. Do you think the chemical treatment will knock this stuff out? It looks like new grass is coming up thru the affected areas.

It almost always looks like new grass coming in. Give it a few weeks to see if it gets spots on it.