Wasps and hornets largely prey on other insects and play an important role in keeping down the pest population in your area. They normally avoid human activity and, if possible, the best response to wasps and hornets is simply to ignore them. However, when wasps and hornets nest in high-traffic areas, it may be necessary to get rid of them or at least cut down on their population. Avoid chemical sprays; control wasps and hornets naturally.
Seal all possible entry points. If you do battle with a wasp in your home once every few days, that's a sign that there may be a nest in your home. Look for the wasp or hornet's point of entry into your house and seal it. If you can't find the point of entry, scout around your home for any unsealed vents, tears in window or door screens, cracks around your window or door frames or open dampers. Correct any problems that you find and you will likely eliminate the indoor wasp or hornet population.
Set a wasp or hornet trap in early spring. In the beginning of spring, there is a 30- to 45-day window when wasp and hornet queens emerge to build their nests. The two main types of wasp and hornet traps are lure traps and water traps. These traps kill the wasps naturally by luring them into the trap with food and then drowning them in water. Place the traps in areas where you have noticed a lot of wasp or hornet activity. One trap per acre in spring is usually sufficient (but the more traps you put out, the more likely you are to reduce next season's wasp population). In fall, distribute more traps in high-traffic areas to catch the more active wasp population.
Check on your wasp or hornet trap every few days. If you do not empty water traps frequently enough, the dead wasps will form a raft that will allow newly-trapped wasps to escape.
Change the bait in your wasp or hornet trap once every two to four weeks, and more frequently when temperatures climb.
Call a professional to remove any wasp or hornet's nests that you find.