cutworms on hostas?

Hi everyone,
 
I think I'm starting to see cutworm damage on my hostas like last year.  It's not too bad yet, so I'm looking for ways to control it this year, preferably something not toxic to other critters. 
 
Today I sprayed a solution that Dr. Peter Asher (sp?) from the U of M uses to keep deer and rabbits away.  I'm wondering if it might also keep the cutworms away?  Anyone know?
 
The recipe is:
 
1 gallon water
1 Tbsp oil
1 Tbsp baking soda
1 Tbsp dish soap (Sun Light)
 
Thanks for any ideas,
 
Cindy Johnson
White Bear Lake, MN
zone 4a
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