Quick answer
Wood borer in teak or rosewood furniture is active if fine, pale powder keeps reappearing after you clean it, or if new small round holes with clean, light-coloured edges appear. Old damage shows darkened holes and no fresh powder over several weeks. Isolate an active piece and do not polish or fill the holes yet. Have the infestation treated through the holes and bare wood, then monitor it and keep it dry through the monsoon.
Key points
- Fresh, pale powder that returns after cleaning, or new holes with clean edges, indicate active wood borer.
- Darkened holes with no new powder over several weeks usually mean old, inactive damage.
- Teak and rosewood heartwood resist borer better than many timbers, but sapwood, secondary timbers and plywood repairs remain vulnerable.
- Polish and varnish limit surface treatment, so furniture is treated mainly through exit holes, joints and unfinished surfaces.
- Keeping furniture dry, ventilated and away from damp walls through the monsoon reduces the risk of borer returning.
Many Goan homes have carved teak cupboards, rosewood chairs, old almirahs and family pieces passed down through generations. Small round holes and little heaps of fine powder under one of them are a real worry. This guide covers wood borer in furniture in Goa: how to tell whether it is active, what treatment involves, and how to protect your other furniture in a humid coastal climate.
Why do teak and rosewood pieces still get wood borer?
Most "wood borer" damage in furniture comes from powder-post beetles and furniture beetles. Adult beetles lay eggs in cracks, open pores or old exit holes. The larvae then tunnel inside the wood for many months, sometimes longer. New adults chew their way out and leave small round exit holes, so most of the damage happens out of sight.
Well-seasoned teak and rosewood heartwood resists borer better than many timbers, but a piece is not immune. Common starting points include:
- the paler sapwood along edges and corners
- softer secondary timbers used for drawer bottoms, backs and inner frames
- plywood panels added during later repairs
- joints where glue or filler sits
Carved pieces also have many deep crevices where eggs can be laid unnoticed.
Moisture adds to the risk. Furniture that stands against a damp wall or on a ground floor through the south-west monsoon stays damp for weeks. Damp timber is more attractive to some wood-boring beetles and to wood-decaying fungi.
Is the damage active or old?
A hole is not proof of a live infestation. Many antique pieces carry holes from beetles that left decades ago. These signs help you tell the difference:
| Sign | Likely active | Likely old |
|---|---|---|
| Powder (frass) | Fresh, pale, fine powder that comes back after you clean it | No new powder; any dust is grey and mixed with dirt |
| Exit holes | Clean, sharp edges with light-coloured wood visible inside | Darkened edges, or holes clogged with polish, wax or grime |
| Hole count | New holes appear that were not there before | The number of holes stays the same |
| Wood around holes | Surface breaking up or crumbling near clusters of holes | Sound, firm wood around the holes |
A simple three-week check
- Brush or vacuum away all existing powder, including from inside drawers and along the base.
- Lay dark paper or cloth under and inside the piece, so pale powder shows up clearly.
- Photograph the hole clusters, or mark them with small masking-tape tags on hidden surfaces.
- Check every few days for three weeks.
- If fresh powder returns or new holes appear, treat the piece as active.
Wood borer and termites are often confused. Termites usually leave mud tubes or soil-like material, while borer leaves dry powder and neat round holes. Our guide on how to tell termites from wood borer explains the differences in detail.
What should you do the day you find fresh powder?
- Isolate the piece. Move it so it is not touching other wooden furniture. Do not move it into a storeroom full of other wooden items.
- Keep it off damp walls and floors. Leave a gap behind it and allow air to move around it.
- Do not polish, varnish or fill the holes yet. Sealing hides the evidence and can block treatment from reaching the tunnels.
- Keep photos and a little powder. They help an inspector judge how active the infestation is and which type of beetle is involved.
- Check nearby timber. Look at other furniture, door and window frames, picture frames, wooden ceilings and stored timber.
- Avoid home remedies. Kerosene, petrol and unlabelled mixtures are fire and health risks, and they can stain or damage old finishes.
How is wood borer in furniture treated?
Our Goa team follows an Integrated Pest Management approach: inspect first, treat only where needed, and advise on the conditions that let borer thrive. A typical furniture treatment runs like this:
- Inspection. We identify which pieces are active and how far the damage goes. We also note the timber and finish, and check whether doors, frames or structural timber are involved.
- Choosing the method. The approach depends on the size, value, construction and finish of each piece.
- Treating through holes and bare wood. Polish, lacquer and varnish limit how far a surface treatment soaks in. So treatment focuses on exit holes, cracks and joints, and on unfinished surfaces such as undersides, backs and drawer interiors. As a licensed pest control operator in Goa, we use CIB&RC-registered products.
- Fumigation where appropriate. Heavily infested or intricate pieces, or a batch of furniture, may sometimes suit fumigation better. It is carried out under controlled conditions by trained staff and must never be attempted at home.
- Drying and re-entry. Keep children and pets away from treated pieces until they are dry or for as long as advised. Ventilate the room and wash your hands after handling treated wood.
- Follow-up. Eggs and larvae deep in the wood may not all be reached at once, so a follow-up check or repeat application may be recommended.
After visits, our Goa branch shares service reports and WhatsApp updates. Material Safety Data Sheets are kept for the products we use. For specific services, a warranty applies to the treated area, as set out in the service agreement. You can read more about the service on our wood borer treatment page and our wood borer pest control services in Goa page.
Carved, polished and heirloom pieces: what changes?
Carved rosewood and teak need a gentler hand. Before a full application, any treatment should be tested on a hidden spot to check it does not mark the polish. Brass fittings, inlay, cane seats and upholstery may need to be protected or handled separately.
Repairs should wait until monitoring shows the borer is no longer active. Holes can then be filled with a matching wax or filler and the piece refinished, ideally by a carpenter or restorer who knows old furniture. Badly weakened secondary timber, such as a crumbling drawer bottom, is often better replaced with seasoned, sound wood.
If you find borer in beams, rafters or old wooden ceilings as well as furniture, read our guide to protecting Portuguese-era homes from termites and wood borer.
How do you stop borer spreading to other furniture?
- Keep a treated piece apart from other furniture until monitoring shows no new activity.
- Leave the dark paper and tape markers in place and keep checking for a few months. Check again after the next monsoon, because larvae can stay hidden for a long time.
- Expect a little loose powder to fall from old tunnels soon after treatment. The warning signs are new holes and fresh powder that keeps returning.
- Inspect second-hand and antique furniture carefully before you bring it home, including the underside and the backs of drawers.
- Do not store offcuts, old frames or firewood next to good furniture.
- Check every wooden piece in the house at least once a year. If you prefer scheduled checks with reports, ask our Goa branch about an annual maintenance contract.
Humidity control through the Goa monsoon
Goa's very heavy south-west monsoon and humid coastal air keep timber damp for long periods. Controlling moisture is one of the most useful things you can do to protect furniture between treatments.
- Keep furniture a few centimetres away from external walls, especially walls that show seepage.
- Raise pieces on ground floors slightly off the floor with small pads or blocks.
- Fix roof leaks, plumbing leaks and wall seepage before the rains where you can.
- Open windows on dry days and run fans so air moves around cupboards and beds.
- Use a dehumidifier or air conditioner in closed rooms and storerooms that hold valuable pieces.
- Cover stored furniture with breathable cotton, not plastic sheets that trap moisture.
- After the monsoon, empty, air and inspect cupboards and chests.
- Keep up regular waxing or polishing. A sound finish slows moisture uptake and closes surface cracks where beetles might lay eggs.
When should you ask a professional to inspect?
Ask for an inspection if any of these apply:
- fresh powder keeps returning after cleaning
- several pieces are affected
- doors, frames or beams show holes
- the piece is valuable or irreplaceable
- you are not sure whether you are looking at borer or termites
Early attention usually means less timber to repair.
Our Goa branch in Chimbel can help. Tell us your location in Goa, what the furniture is, and what you are seeing; photos of the holes and powder are very useful. You can find branch details on the Goa branch page or reach us through our contact page.
Frequently asked questions
QCan I treat wood borer in my furniture myself?
You can do a lot yourself: isolate the piece, monitor it with dark paper, and manage damp. Avoid kerosene, petrol or homemade chemical mixtures, though. They are fire and health risks and can ruin old finishes. Products sold for wood borer must be used strictly as the label directs. For valuable, carved or heavily affected pieces, a professional inspection helps you choose a method that reaches the larvae without harming the piece.
QWill treatment damage the polish on my rosewood furniture?
Careful treatment should not harm a sound finish. Most of the work is done through exit holes, cracks, joints and unfinished surfaces such as undersides and drawer interiors, not across polished faces. A test on a hidden spot is sensible first. Any refinishing or hole-filling is best left until monitoring shows the borer is no longer active, so the evidence isn't covered up too early.
QIsn't teak naturally resistant to wood borer?
Well-seasoned teak heartwood is more resistant than many timbers, but teak furniture can still be attacked. Borer often starts in pale sapwood along edges or in softer secondary woods used for drawer bottoms, backs and frames. Later plywood repairs are another weak point. That is why a solid teak cupboard can still show holes on its back panel or drawers while the front stays untouched.
QWhy is some powder still falling after the furniture was treated?
Old tunnels inside the wood are full of loose powder. Moving or tapping a piece after treatment can shake some of it out for a while, so a little powder is not automatically a sign of failure. What matters is whether fresh, pale powder keeps returning over several weeks, or whether new exit holes appear. Keep dark paper under the piece and mention any repeated activity at the follow-up.
QCan wood borer spread from one piece of furniture to another?
Yes. Adult beetles that emerge from an infested piece can lay eggs in other suitable timber nearby. Risky spots include furniture stored close together, old frames and spare wood. This is why isolating an active piece, checking surrounding furniture and door frames, and inspecting second-hand items before bringing them home are all important steps.
QShould I throw away furniture that has wood borer?
Not usually. Many infested pieces, especially solid teak and rosewood, can be treated and then repaired once the borer is no longer active. Replacing badly weakened secondary parts, such as a crumbling drawer bottom, is often enough. Disposal is generally only worth considering when the main structure has lost its strength, and an inspection can help you judge that before you decide.
Last updated 13 October 2026. Information on this page is general guidance; your technician will advise on your specific property after inspection.
