Natural Wasp Control

We have been asked many times about how to deal with wasps that take up residency
in your birdhouses. An ounce of prevention is worth a pound of cure.

Prevention:
Seal entry points. Solitary wasps in the home can be a nuisance; daily sightings of wasps in the home may indicate inside nest building, and more attention to the problem is required. Searching for and sealing off their point of entry is the best line of defense. Check your house for unsealed vents, torn screens, cracks around windows and door frames and open dampers. Observe the flight path of a wasp, especially in the morning, which may reveal the entry/exit point.
Remove food sources. In spring and early summer, wasps are attracted to protein foods. Any food left outdoors, such as pet food, picnic scraps, open garbage containers or uncovered compost piles should be removed or covered. Wasps imprint food sources, and will continue to search an area for some time after the food has been removed.
In late summer and early fall, the wasp food preference turns to the sweet. Their behavior is also more aggressive. Open cans of pop, fruit juice, fallen apples beneath fruit trees and other sweet food sources will attract wasps. Be sure to cover drinks and open food containers, keep a lid on the compost and avoid walking barefoot near fruit trees. Remove any fallen fruit rotting on the ground.
Avoid swatting. Swatting and squashing wasps is counterproductive. When a wasp is squashed, a chemical (pheromone) is released which attracts and incites other nearby wasps. It's best to walk away from a hovering wasp.
Avoid wearing bright colours or floral patterns. If you look like a big flower, you may be attracting the curious wasp looking for nectar.
Minimize use of perfumes and other strong scents. In the later part of the summer, wasps are attracted to sweet smells.
Wasps building nests in your bird house? This common problem can be minimized by lining the under-roof area with aluminum foil. Use a staple gun to attach. Another option is to rub the under-roof area liberally with bar soap - ordinary soap like Ivory soap will do. One application can last through an annual wasp season.