Have deer?

I had a problem with robins pulling mine out. I never actually saw them do it, but i know thats who it was. I have a fence around my corn, so it was a bird... Those robins are always in my garden, but now that everything is bigger they leave it alone.

gophers?

Yeah, I was going to say gophers before raise beat me to it. Birds do not usually bother plants that tall, insects probably could not have done it (unless it was a plague of grasshoppers like those that are beginning to attack things here in Texas now) and deer would probably have eaten more and left some tracks or other sign of their presence, I think.

They do make some gopher traps, or perhaps some moth balls down that hole might send him packing. You could probably dig them up and dispose of them later when the problem has passed.

Good luck in figuring it out, hope that you can get the rest of your corn to grow and produce. Once is gets nearly ready to pick, crows, squirrels, deer, wild hogs or some other things will probably want to help you harvest it.
Bill P.

It's probably a plot hatched by those rampaging, murderous outdoor kitties. First babies, now corn.

If you are in the Georgia piedmont, voles are the most likely culprit. They run fairly deep burrows at time and emerged from holes like the one you described. They love to cut young corn stalks and eat the sweet end.

Here is a link that might be useful: vole