How to do it:
Use a DIY prevention method by applying citrus oil spray to wood surfaces.

Result:

• Mix water with citrus essential oil in a spray bottle.
• Spray the mixture on exposed wood, especially in areas where carpenter bees are active.
• Repeat application every few days during bee season.
• Seal cracks and holes in wood with caulk or wood filler.
• Paint or varnish wood surfaces to deter bees.

Problem:
This method may fail if the citrus scent fades quickly, if bees are already nesting inside the wood, or if all entry points are not properly sealed.

How to do it: Mix equal parts citrus oil (like orange or lemon) with water in a spray bottle. Spray the mixture on wood surfaces where carpenter bees are active. Repeat every few days, especially after rain.

Result: The citrus scent repels carpenter bees, discouraging them from boring into wood and causing damage.

Problem: This method may fail if the scent fades quickly, if rain washes it away, or if bees are already nesting inside the wood.

How to do it:
Physically remove carpenter bees and block their access points.

Result:

• Locate and remove visible carpenter bees using a vacuum or net.
• Seal existing holes with wood putty or caulk.
• Install fine mesh screens over vents and openings.
• Paint or varnish exposed wood surfaces to deter nesting.
• Regularly inspect and re-seal any new holes.

Problem:
This method may fail if bees find or create new entry points, or if all existing nests are not detected and sealed.

How to do it:
Use nematodes or parasitic wasps as biological control agents to target carpenter bee larvae.

Result:

• Purchase beneficial nematodes or parasitic wasps online or at garden centers.
• Release them near carpenter bee nesting sites outside your home.
• These natural predators attack and reduce carpenter bee larvae populations, discouraging further nesting.

Problem:
This method may fail if the predators do not establish well, if the infestation is already severe, or if bees have already entered your home. Environmental factors may also limit effectiveness.

How to do it:
Use a chemical DIY method by applying insecticidal dust or spray (such as carbaryl or permethrin) directly into carpenter bee holes. Seal holes with wood putty after treatment. Repeat every spring and fall.

Result:

• Kills existing bees inside tunnels
• Prevents new bees from entering
• Reduces future infestations
• Protects wood goods from further damage

Problem:
This method may fail if all tunnels are not treated, if bees have already left, or if chemicals are not reapplied regularly.