We planted our garlic in the fall and it is almost ready for us to pull up...and I will be glad because I really need to make a batch of bug spray. I still have been battling bugs on my herbs...I make this solution and it really seems to work.
6 large cloves of garlic chopped fine
1 small onion
1 tablespoon of cayenne pepper
1 tablespoon dish soap (cheap)
1 quart of water.
I mix this all together and let it sit over night. I strain with some cheese cloth...I then put the solution in a spray bottle.
This will work on many plants just don't let the solution sit on your plants for many days...I always test it on one plant to even see if it will kill the bugs and it usually does!