I didn't read the responses, sorry, hope I don't repeat too much!
FIrst off, you don't need him to apply! You will need his info, but not his permission! It is not always based on nutrition, but on income.
Second, When my hubby and I both got out the military, I had one baby and preggo with the second, and Wic was awesome! Milk (something to the tune of 2 or three gallons a week! Thats over $30 a month saved in milk alone), cheese, eggs, peanut butter, cherrios, juice, formula, baby rice and more!
I don't have any way to help him come around if he doesn't want to do it for 'macho' reasons. Just know you are not alone. My husband, even though we were really struggling, waited four months to file for unemployment (I was ineligable because I was preggo and therefore not looking for a job at that time), because he was embarrased and it hurt his ego to not be able to find a job. Maybe just do a WIC trial month or two so he can see how much you will save!! If, after seeing how it is not as bad as it seems, he still doesn't want it, then you can just stop it, no harm done.
You know, they also do things such as help with immunizations (if you go that route) and many other things that are benificial. At least ours did. Check out your local WIC website if they have one.