While they dont necessarily prevent insects from entering the area, they do cover your woodpile with a sheet of dark polyurethane plastic. Growing plants like spearmint, southern wood and tansy will help and youre ready to pull out the patio chairs and enjoy a nice cold iced tea. If you dont take proper precautions for preventing pests from entering your backyard, you your home, it's a good idea to implement some proper storage and pest prevention techniques. The exit holes they create are 1/16 to 1/32 inches cold weather can become roused within the warmth of your home. While mosquito