Try using a one gallon water pump up type sprayer and mix in sevin or bifethrin or permethrin insecticide and follow the directions for general insect control. Locate the nest and spray them at sun down. In ground nests are tougher to kill and may need to treated at night when the hive is quiet. Mix one gallon or less of water and insecticide and fill the hole. Do not do this around the lake or areas of water as the insecticide may leach into the water and kill the fish.
Insecticide in a can has petroleum carriers and will kill foliage it contacts so, dont spray the bushes or lawn with it unless that is all you have. Boiling water poured into ground hives has limited success, yet is safe for the environment, just do not burn yourself applying it. Put your sneakers on and get ready to run if you need to.
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