What Is the Treatment for a Carpenter Bee Infestation?


Quick Answer

Carpenter bee infestations are typically treated with a combination of aerosol and powdered insecticides, according to Do-It-Yourself Pest Control. The entrances to tunnels where the bees live must also be closed after killing the bees, explains Log Home Care.

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Full Answer

Most carpenter bee tunnels are located on unfinished wood surfaces on the outside of the home. The entrances to the tunnels are typically small, circular holes that are about 1/4 inch in diameter, according to Log Home Care. After locating the entrance points, a thin, flexible wire is inserted into the entrance to ensure the insecticide reaches the farthest point of the tunnel.

Log Home Care states that after pushing a wire through the tunnel, insecticide is sprayed into the tunnel to kill the carpenter bees and any larvae that are present. A powdered, residual insecticide can also be inserted into the carpenter bee's tunnel to prevent the bees from returning. Typically, insecticide is reapplied monthly during spring and summer, and once in early autumn before cooler weather begins.

After the powder insecticide is applied, the entrance to the bee's tunnel is closed using wood putty or caulk, according to Do-It-Yourself Pest Control. Other areas that may be attractive to carpenter bees, such as cracks in siding, can be sealed with caulking. Preventative measures are often used to ensure carpenter bees do not return to the area the following spring. Log Home Care suggests to paint any unfinished wooden surfaces on the exterior of the home, as this deters most carpenter bees. A coat of clear polyurethane can be used in place of paint to deter carpenter bees.

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