Borax 20 Mule Team Has Tons Of Uses, but one of the best ones is keeping SNAKES out of your yard and home. Just sprinkle this around perimeter of home every 30 days. Cheap and easy to find at Dollar Store or Dollar General.
Spray garlic tea over the entire problem area and for even more control broadcast dry minced garlic at 2 - 5 lbs per 1000 sq ft. One person commented Your tip about dried minced garlic is the first thing that has worked for my TERRIBLE mosquito problem in my small backyard. By the way, I found a 23-oz container at Sam's Club for $3.85.