I have been seeing tons of wasps on the side of my house alongside the chimney. They get close to one another like they’re huddling but don’t move much. I don’t see any nest and by late morning they seem to disappear. I don’t see them every morning but mostly when it gets cool. Last year we had a few doing this but now its like hundreds. I want to treat but where? I can’t find the nest.
If you read through our WASP CONTROL ARTICLE, you’ll learn it’s quite common to see wasps congregate this time of year. That’s because like all insects, wasps are controlled by the local air temperature. As the air cools in the fall, it will slow most insects down. Eventually some of these insects will die as winter rolls around. But many others will hibernate on trees, rocks and houses and there are some species of wasps that do exactly this from year to year. I suspect you are seeing one of these species and they’ve marked your home as a good place to over winter. If left untreated I’m afraid you’ll see more and more. Additionally, this can lead to wasps ending up in living areas as they forage through wall voids seeking warm air. In the process of moving about some can get inside and for obvious reasons you don’t want a house full of these guys if you can avoid it from happening.
At this point I suggest you at least spray the sides of the home where you see them grouping up with the CYPERMETHRIN featured in our article. It will both kill what’s there and prevent more from coming around. Wasps use pheromones to alert others in the area of a good nest site and over time more and more are likely to follow this scent. Once on the house, there are probably cracks and crevices they’ll use for shelter and warmth during the coldest months. If you see cracks or spaces where any are traveling, be sure to dust them with DRIONE DUST. It’s long lasting, kills on contact and will repel any insect from the area. It’s ideal for this type of problem and should be applied once a year when invading perimeter pests like wasps try to use any structure for hibernating.
Here are direct links to the information and products listed above:
Wasp Control Article: http://www.wasps.net/wasp-and-hornet-control
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