One known method is applying wood putty at a nest s entrance hole.
Carpenter bees hole cedar siding.
They like to make a hole in the decks siding porches doors fences wooden lawn furniture and other wooden things around your living space.
After filling the holes completely paint over them.
When carpenter bees emerge in spring and again in fall fill holes with a bit of steel wool a wad of aluminum foil a dowel and wood glue or even caulk.
It sounds like this might be happening at your house.
If you read through our carpenter bee control article you ll learn these bees will readily crawl under siding and facia boards to drill nests which will then effectively be hidden and secure.
Their hole is commonly very neat.
They are egg larva pupal and adult stages.
The symmetry of the circle is amazing especially given they are making this hole with their mouths.
How to deal with carpenter bees.
Holes larger then two inches in diameter may be drilled by the woodpecker into the siding usually between the seam of the two clapboards figure 1.
There are carpenter bee holes in the cedar swing the trees and any other exposed wood even painted stained.
The female carpenter bee is the one who makes the hole by chewing through the wood.
Thank you for your time.
The holes that the bees produce are often 1 2 inch or so in diameter.
The nest is used by the female carpenter bees to lay their eggs until hatch.
Carpenter bees have 4 life cycles.
If the entry point is close to the ground squirt some powder on the ground.
She creates a perfect hole half an inch wide in the wood.
These are most likely the beginnings of roosting or nesting holes.
Fall is the absolute best time to plug any carpenter bee nests in order to prevent young carpenter bees from emerging and continuing their wood burrowing ways.
This takes a lot of work so sometimes they will use existing holes from years past.
We have tried filling the holes with caulk silicone and the bees rebuilt their hole.
When you caulk holes this large the caulk either shrinks and leaves a depression or it droops from the hole after you get down from the ladder.
Make sure to cover all the points using the marks you used as a reminder.
Instead they burrow into soft woods such as the siding of a house to live in and lay larvae.
I prefer to use wood dowel rods and or latex wood filler.
The adult will bore a hole just under inch round into unpainted unfinished and untreated wooden porches fences and fascia boards to lay eggs.
When the bees are sleeping squirt the powdered insecticide from the bottle at the entrance and exit points on the siding.
In either event it is an also ran in my opinion.
Spray the powder in the opening of the siding.
There is a bit of a debate on how to successfully plug up a carpenter bee nest.
