Q: Bees are going in and out of a minute crevice above my kitchen window. I’ve been spraying them, but they keep coming back. I’d like to caulk up the hole, but should I do it now or wait for winter?
— Dave Ferko
A: Those insects are probably yellow jacket wasps that are nesting in your wall. What’s important isn’t so much the timing, but that you kill them before caulking the opening, said Sherrie Williams of A-Best Termite and Pest Control in Akron.
You can identify yellow jackets by their constant activity in and out of the hole. “It’s like a little airport,” she said.
Williams recommended using a dust to kill them. Her company sells a dust in a vinyl squeeze can with a long straw that can easily be directed into the crevice.
Had you not already sprayed the spot, you could expect the dust to work in about 72 hours. However, Williams said aerosol sprays have an odor the yellow jackets don’t like, causing them to disperse. Since the insects are no longer concentrated in the nest, you may have to use repeated applications of the dust to get rid of them all.
Don’t caulk the opening until all activity around it has ceased, indicating all the wasps are dead, she cautioned. If you seal them in alive, they’ll seek any way out of the wall cavity they can find, which most likely will be into your house.
Have a question about home maintenance, decorating or gardening? Akron Beacon Journal home writer Mary Beth Breckenridge will find answers for the queries that are chosen to appear in the paper. To submit a question, call her at 330-996-3756, or send email to firstname.lastname@example.org. Be sure to include your full name, your town and your phone number or email address.