Go to Wally world in the garden center get the quart of termite/ant killer with 5% permethrin, mix 2 oz per gallon in a pump lawn sprayer. Mist spray the area. I spray my whole yard about every three weeks. keeps all the bugs away including fleas, chiggers etc. I even had bad mole problem a couple of years ago and they went away. Must have soaked into the ground and killed the grubs so the moles went elsewhere!