Chemical control of wasps and hornets should be a last resort because worker populations are gone anyway after a hard freeze or several frosts. Control of these social wasps, although usually not difficult, has its element of risk in being stung. It is best to conduct control operations on nests at dusk or after dusk to avoid being stung, since most of the wasps will have returned to their nest. If applications must be made during the daylight hours, the use of protective equipment, such as gloves, hat, bee veil, coveralls, might be needed to help prevent stings from any airborne wasps.
