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Carpenter Bees Season

Carpet Bee

Carpenter Bee

  1. Spray a residual insecticide in the areas where the bees are active. …
  2. Apply Residual Insecticide Dust in Carpenter Bee holes and galleries with a duster. …
  3. Plug the holes (caulk or wood putty) during the fall months.


1. Residual Liquid Treatments To Spray

Carpenter Bees bore into wood causing structural damage.  Use a residual treatment to discourage the bees from damaging the structure of your wood. We prefer to use organic sprays that will not harm your environment or your health.  The hole may need to be treated more than once to prevent them from coming back.   Carpenter Bee season is through March to October.

2. Using Dust In Carpenter Bee Holes

Carpenter Bees like to make their holes under decks, siding soffits, overhangs, fence post, fascia boards and even window frames.   Dust is one of the best solutions in combating Carpenter Bees.  Placing Dust in the holes will get on the bees as they come back to harborage.

There’s all types of dust to apply to the holes that will be effective.  However, since we are Truly Green Pest Service, we prefer natural dust as well.  Dust may take time to become effective as each chamber is sealed off.

3. Plug Up Carpenter Bee Holes

carpenter bee holes

Plugging holes is very effective.  You can use putty or corks. This will keep the bees from entering and cause them to go elsewhere.  Wood putty may be the best. You can match the wood putty to the wood you are stuffing.  When plugging these holes choose a time such as the fall when the season is over. Cork to early, they may drill elsewhere on your structure.  Its all about the timing. Start before the season of the bees and you will be successful.

4. Carpenter Bee Traps

For those considering a non-chemical approach to carpenter bee control, we recommend the Best Bee Trap. This trap is specially designed to attract and trap the carpenter bees. If you have an existing carpenter bee infestation, hang it directly over the carpenter bee holes. If you do not have an existing infestation, hang the traps at peaks and corners of your home, preferably on the sunniest side of your house

How To Prevent Carpenter Bee Infestations – Spray Early (early spring months)

  • Prevention is the operative word for carpenter bee control. Prevent them before you have to get rid of them. Carpenter bees most often prefer to bore holes in the wooden areas that receive the morning sun or afternoon sun.
  • Carpenter Bees attack unfinished wood under decks, sills, and decks first. Varnish or paint these wood surfaces to make them less attractive to these bees. A fresh coat of paint is unattractive to a Carpenter Bee.
  • Seal as many exterior openings as possible. The Carpenter Bees are looking for cracks that will protect entrances. Seal and caulk these cracks and crevices.
  • Carpenter Bees will reuse holes from the previous season. Caulk these holes in the fall, after the carpenter bees have emerged.
  • Carpenter Bee prevention and extermination is usually best done before nesting activity gets started. If you do not have a chance to paint or varnish the unfinished wood, before the bees bore into the wood, spray the unfinished wood in these vulnerable areas (under rail sidings, under decks, around window sills, etc) with a good residual spray such as the ones listed below. The best time to spray preventive for carpenter bee control is spring time. Nesting and the rearing of young carpenter bees occur in the late spring or early summer. These residual insecticides will last 2-3 months, continue retreating until the fall season.

woodpecker Woodpeckers may be peck in to carpenter bee tunnels in the wood trying to eat the bee larvae.


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