While these will not work for corn, may I suggest a post-emergent such as
Fluazifop-p-butyl or Sethoxydim

http://www.css.cornell.edu/WeedEco/H...p-p-butyl.html
http://pmep.cce.cornell.edu/profiles...xydim-ext.html

Once applied I would also recommend a generous application iron to any
residual weeds.
For iron I have been using the a 4th riding rototiller(New Holland), the
large troybuilt, a Mantis style tiller, and of course the sacred hoe.

wrote in message
...
On Mar 25, 6:20 pm, Eggs Zachtly wrote:
Glenn said:

I lose the battle of grass and other crap in my garden every year. I
only
plant corn (3 plantings), a few tomatoes from plants, maybe a couple
hills
of cantaloupe and broadcast some flowers across one end.

Is there a pre-emergent that I can use just after the things I want are
above the ground, for the grass that won't kill everything else?

If it's a "pre-emergent", it won't kill anything that's already
germinated.
Depending on your location (you were more than a bit vague about that), it
/may/ be too late to apply. Then again, it may not.

--

Eggs

When the only tool you own is a hammer, every problem begins to look like
a
nail.


I'd also make sure the pre-emergent is listed for use on vegetable
crops used for food.