B & B Exterminating have been treating my lawn now for close to a year. I rate their service with great recommendations. They are a very professional company, who has also provided me with a termite home inspection. They were recommended to me by a great friend and I would do the same, for someone else. They come out and spray on a monthly base (not this quarterly base) and the technicians give you great feed back on what they find to be the issue.
