Jake, I hope by now you have done something about that cutworm. I was told that each worm will eat 3-4 plants per night. here are some pictures from 2 years ago when cutworm infested 300 acres of my corn. Was spreading Am.Sulfate at the time and thought that the plants turning brown were burn from the fertilizer untill I took a closer look. This happened on a weekend so I wasn't able to get the product ( Matador ) until Monday. Could only spray in the morning or at night, so didn't spray until Monday night.  When everything was done the field looked like this ( picture below ) in just a few short days. I know you're organic, and I'm leaning towards doing things your way, so It would be interesting to know what you used and how it worked.

Good Luck 

(cutworm (557 x 358).jpg)

(cutcorn (541 x 661) (406 x 496).jpg)

(cutfield.jpg)

cutworm (557 x 358).jpg (86KB - 618 downloads)

cutcorn (541 x 661) (406 x 496).jpg (57KB - 610 downloads)

cutfield.jpg (68KB - 590 downloads)