These honeycombs are most likely made from Polistes wasps - better known as paper wasps. The Polistes wasp is a predator that builds paper nests in the eaves of buildings and under other objects. As a predator, the Polistes wasp is not a problem for picnickers, but is an aggressive species that will deliver a painful sting. This wasp will not be attracted to wasp traps because it hunts for live prey. Nuisance nests (active) can be destroyed with an insecticide. Insecticide applications are best made during late evening or cool periods in early morning when the wasps do not readily fly. When approaching a colony, wear light-colored clothing as it is less likely to disturb the defending insects. Also, do not wear loose-fitting clothes that may inadvertently trap wasps. Apply insecticides directly into the nest entrance. In most cases, a single application should destroy the colony, although newly emerging wasps will continue to be produced for about one week after the application. For more information, see the Fact Sheet at http://www.ext.colostate.edu/PUBS/INSECT/05525.html. For recommendations of specific insecticides for wasp control, contact your local Extension office.

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