How to get rid of Wood Wasps

wood wasps siricidae how to get rid of

The terms “wood wasp” and “horntail” are actually used to describe various species of insects that belong to the family Siricidae of the order Hymenoptera and that inhabit wood structures. They are called a wasp because of their resemblance to a wasp, but actually don’t sting. Most of the times, though, people will use them to refer to the greatest cause of concern, which are the large wasps that are normally attracted to the dead or dying conifer trees.
The main problem with wood wasps is that wood, infested with eggs and larvae, can be processed into infested lumber, which can then lead to adult wasps emerging in recently completed buildings. This can happen easily, seeing as wood wasp larvae often go unnoticed. Due to the same reason, wood wasps can also be brought inside homes through firewood.

wood wasps siricidae how to get rid of

Between a year and three years after infested lumber was used in construction, wood wasps will emerge, and chew a 6-7 mm hole through anything covering it, including drywall, linoleum, carpeting, non-ceramic floor tiles or hardwood. Once they emerge from the wood, no treatment is needed since they don’t reinfest structures. Even if male and female wood wasps had the opportunity to mate in the building, the females would not be stimulated to lay eggs in dry, finished lumber, as they will search for untreated one.
Wood wasps are also a problem outdoors, seeing as the tunnelling of larvae can weaken wood, making it prone to further disease or damage. Adults also help with wood decomposition by introducing yeasts, bacteria, and wood-rotting fungi. If the damage caused by them is severe, replacement of the affected wood will be needed, for safety purposes.

Signs of infestation

The most obvious signs of infestation are the galleries that larvae dig beneath the bark, together with the fine dust this process leaves behind. Wood wasps’ larvae are recognisable by the spine they have on the end of their bodies, and their colour is white. The adults also leave round, clean-cut holes when they emerge from the wood, so the sight of such holes is also a sign of infestation.
Since woodpeckers and other types of birds can “hear” the larvae as they work inside infested wood, it is not uncommon to see such birds start pecking away at the wood or any part of a structure which is harbouring horntails larvae. If you see such behaviour from the birds found in the trees or lumber in your yard, you can take it as a sign of wood wasps presence. They can be found anywhere, from siding, overhangs, soffits, decks, to door frames, window frames, attics, basements, crawl spaces or porches.

Seeing as wood wasps only target unhealthy trees, you can try to prevent an infestation by:

  • maintaining trees healthy;
  • preventing attacks on recently dead or cut trees.
  • removing, treating and processing wood as quickly as possible.

Otherwise, store logs in a safe area, and if you are using firewood, you should store it outside the house, and only bring it inside when you plan to use it.

Getting rid of Wood Wasps

The number of wasps per individual nest is relatively small, as wood wasps don’t normally live in a colony. This is good, because if timber infested with wood wasps is to be used in your home, even after they emerge from the wood, the wasps will be quite small in number.

Although they are extremely annoying due to the low buzzing noise they make when flying, these insects are not harmful to humans or to the wooden structures they have infested. The little damage they manage to do is only cosmetic (especially unsightly in wood that has been painted or stained), and the actual number of wood wasps that emerge in any building as a result of infested lumber is small. Wood wasps are also unable to bite or sting; the females’ ovipositors are used strictly to lay eggs. Wood wasps are otherwise only attracted to untreated wood, not the one used in buildings or to furniture; as such, they will not re-infest the structures, as females are not being stimulated to lay eggs in dry, processed lumber. They prefer weakened, dying, and recently cut trees, and can also attack freshly cut timber before it is dried, or fire-damaged trees. Due to this, the best methods of control management are to prevent attacks on dead or fallen trees. Removing and processing wood quickly is the best way to prevent damage. Proper handling methods of wood that might be attacked by wasps includes milling or debarking susceptible logs prior to the attack period and storing them in an area safe from attack.

They also do not build nests in the ground or attached to higher terraces, so dealing with removing a nest will not be the case here. They will only use decaying, weakened tree trunks or timber, to inject their eggs directly into the wood, which will then be eaten from the inside, once the larvae hatch. Considering this, the best course of action is to wait for them to complete their life cycle and then to repair the cosmetic damage they have inflicted upon the wood.
Kiln drying or vacuum fumigation of lumber are the only effective ways to kill wood wasp larvae, but this sort of treatment is costly, and timber is usually not considered valuable enough to be treated. Finding a wood wasp nest can also be very challenging.
You can use products that will be able to penetrate the infested wood, such as borate based ones. These act as stomach poison to any wood eating insects, affecting wood borers and wood lice as well. As borate base products are normally odourless, you can easily apply them with the help of a low-pressure pump, spraying the wood you have, both inside and outside your home. Treating all the exposed wood will serve as a method of long term control, as it will protect the deck, door frame or window sill from fungi, molds and mildews as well.

Fogging concentrated insecticides for Wood Wasps control:

Foggers for Wood Wasps control:

  • birchmeier sprayer garden star - 1, small

    Garden Star

    €77.05

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • birchmeier sprayer iris 15 - 1, smallFree Shipping

    Iris 15

    €293.2

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 15 liters
  • birchmeier sprayer profi star - 2, smallFree Shipping

    Profi Star 5L

    €136.33

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • birchmeier sprayer rpd 15 abr - 1, small

    RPD 15 ABR

    €149.95

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 15 liters
  • eu birchmeier sprayer fogger spray matic 20s - 2, smallFree Shipping

    Spray-Matic 20 S

    €906.16

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 20 liters
  • birchmeier sprayer spray matic 5p - 1, small

    Spray-Matic 5P

    €177.44

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • stihl sprayer sg 31 - 2, small

    SG 31

    Regular Price: €39.48

    €36.13

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Stihl

      Tank Capacity:

    • 5 liters
  • eu stihl sprayer fogger sg 21 - 6, small

    SG 21

    €26.47

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Stihl

      Tank Capacity:

    • 3 liters
  • eu stihl sprayer sg 71 - 7, small

    SG 71

    Regular Price: €124.33

    €101.85

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Stihl

      Tank Capacity:

    • 18 liters
  • eu solo sprayer 401 - 14, small

    401

    €14.21

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 1 liter
  • eu solo sprayer fogger 402 - 8, small

    402

    €16.27

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 2 liters
  • eu solo sprayer 408 - 5, small

    408

    €18.31

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 5 liters
  • eu solo sprayer 409 - 3, small

    409

    €21.68

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 7 liters
  • eu solo sprayer 425 classic - 8, smallFree Shipping

    425 Classic

    €85.24

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 15 liters
  • solo sprayer 425 comfort - 6, smallFree Shipping

    425 Comfort

    €100.57

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 15 liters
  • eu solo sprayer 435 comfort - 7, smallFree Shipping

    435 Comfort

    €129.92

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 20 liters
  • eu solo sprayer 453 trolley - 5, small

    453 Trolley

    €40.01

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 11 liters
  • eu solo sprayer fogger 456 - 14, small

    456

    €36.12

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 5 liters
  • eu solo sprayer 457 - 4, small

    457

    €39.78

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 7 liters
  • eu solo sprayer 461 - 6, small

    461

    €28.04

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 5 liters
  • eu solo sprayer 462 - 3, small

    462

    €32.51

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 7 liters
  • eu solo sprayer 473d - 6, smallFree Shipping

    473D

    €78.14

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 10 liters
  • eu solo sprayer 475 - 5, smallFree Shipping

    475

    €105.24

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 15 liters
  • eu volpi sprayer fogger elettroeasy - 7, smallFree Shipping

    ElettroEASY

    €169.5

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 15 liters
  • eu volpi sprayer green fox - 7, small

    Green Fox

    €23.85

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 8 liters
  • eu volpi sprayer tech 05 - 3, small

    Tech05

    €1.88

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 0.5 liters
  • eu volpi sprayer fogger tech 1 - 1, small

    Tech1

    €2.15

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 1 liter
  • volpi sprayer tech 2 - 1, small

    Tech 2

    €10.75

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 2 liters
  • eu volpi sprayer fogger tech 6 - 9, small

    Tech 6

    €42.48

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 6 liters
  • eu volpi sprayer tech 10 manometer - 1, smallFree Shipping

    Tech 10 with Manometer

    €66.22

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 10 liters
  • volpi sprayer tech 12 - 7, smallFree Shipping

    Tech 12

    €63.47

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 12 liters
  • volpi micronizer hood m3000 - 2, smallFree Shipping

    Micronizer HOOD M3000

    €86.48

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 1 liter
  • volpi micronizer jolly m10v - 2, small

    Micronizer Jolly M10V

    €69.47

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 10 liters
  • volpi micronizer m2000 - 2, smallFree Shipping

    Micronizer M2000

    €81.82

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 1 liter
  • igeba sprayer es 5 m 5 litre - 3, smallFree Shipping

    ES 5 M

    €227.78

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Igeba

      Tank Capacity:

    • 5 liters
  • igeba sprayer es 10 m 10 litre - 0, smallFree Shipping

    ES 10 M

    €271.94

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Igeba

      Tank Capacity:

    • 10 liters
  • eu gloria sprayer fogger 505t profiline - 6, small

    505T Profiline

    €221.19

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 5 liters
  • gloria sprayer classic 1200 - 0, smallFree Shipping

    Classic 1200

    €61.49

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 12 liters
  • gloria sprayer classic 1800 - 0, smallFree Shipping

    Classic 1800

    €73.78

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 18 liters
  • eu gloria sprayer fogger hobby 10 - 5, small

    Hobby 10

    €9.66

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 1 liter
  • eu gloria sprayer fogger prima 5 42e - 5, small

    Prima 5-42E

    €31.93

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 5 liters
  • eu gloria sprayer fogger prima 8 - 4, smallFree Shipping

    Prima 8

    €63.34

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 8 liters
  • eu gloria sprayer fogger pro 10 - 3, small

    Pro 10

    €9.9

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 1 liter
  • mesto sprayer 3594p resistant plus - 1, small

    3594P Resistent Plus

    Regular Price: €280.04

    €224.03

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 4 liters
  • mesto sprayer 3592p resistent extra plus - 3, small

    3592P Resistent Extra Plus

    Regular Price: €251.92

    €201.54

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 5 liters
  • mesto sprayer 3615g inox - 1, small

    3615G Inox

    €309.48

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 10 liters
  • eu mesto sprayer fogger 3552 rs125 - 4, smallFree Shipping

    3552 RS125

    Regular Price: €143.4

    €114.72

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 12 liters
  • eu mesto sprayer fogger 3232r flori - 6, small

    3232R Flori

    Regular Price: €34.3

    €27.44

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 5 liters
  • eu mesto sprayer fogger 3237p primer - 3, small

    3237P Primer

    Regular Price: €48.64

    €38.91

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 5 liters
  • mesto sprayer 3270 profi plus - 1, smallFree Shipping

    3270P Profi Plus

    Regular Price: €128.77

    €103.02

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 10 liters
  • mesto sprayer 3541g stabilus - 1, small

    3541G Stabilus

    Regular Price: €325.02

    €260.02

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 18 liters
  • eu solo sprayer fogger 475 comfort - 5, small

    475 Comfort

    €122.44

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 15 liters
  • eu birchmeier sprayer fogger hobby star 5 - 4, small

    Hobby Star 5

    €44.21

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • eu birchmeier sprayer fogger super star 1 25 360 - 11, small

    Super Star 1.25-360

    €23.56

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 1.5 liters
  • eu birchmeier sprayer fogger foxy plus - 6, small

    Foxy Plus

    €7.49

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 0.5 liters
  • eu birchmeier sprayer fogger dr 5 - 13, smallFree Shipping

    DR 5

    €156.2

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • eu forefront sprayer fogger gorilla proline vi pro sys 9 5 l - 1, small

    Green Gorilla ProLine Vi Pro System, 9.5 litres

    €512.84

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • ForeFront Product Design

      Tank Capacity:

    • 9.5 liters
  • forefront sprayer green gorilla proline vi pro system 5 7 liters - 0, small

    Green Gorilla ProLine Vi Pro System, 5.7 litres

    €506.1

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • ForeFront Product Design

      Tank Capacity:

    • 5.7 liters
  • eu solo sprayer 458 - 10, small

    458

    €46.15

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 9 liters
  • gloria sprayer 510t profiline - 1, small

    510T Profiline

    €320.22

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Gloria

      Tank Capacity:

    • 10 liters
  • eu mesto sprayer fogger 3270fo foamer - 5, smallFree Shipping

    3270FO Foamer

    Regular Price: €147.27

    €117.82

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 8 liters
  • mesto sprayer 3132fo foamer - 2, small

    3132FO Foamer

    Regular Price: €24.45

    €19.56

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 1.5 liters
  • birchmeier sprayer foam matic 5e - 1, smallFree Shipping

    Foam Matic 5E

    €275.1

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • birchmeier sprayer foam matic 5p - 1, smallFree Shipping

    Foam Matic 5P

    €275.1

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • eu mesto sprayer fogger 3132pg universal plus - 3, small

    3132PG Universal Plus

    Regular Price: €17.93

    €14.35

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 1.5 liters
  • mesto sprayer 3132gr bugsi 360 - 1, small

    3132Gr Bugsi 360

    Regular Price: €17.93

    €14.35

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 1.5 liters
  • eu birchmeier sprayer fogger rec 15 abz - 9, small

    REC 15 ABZ

    €788.46

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 15 liters
  • birchmeier accessories vario gun - 1, small

    Vario Gun

    €52.15

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier
  • eu solo sprayer 424 nova - 9, small

    424 Nova

    €94.51

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 16 liters
  • mesto sprayer 3595f inox plus - 1, smallFree Shipping

    3595F Inox Plus

    Regular Price: €291.29

    €233.03

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Mesto

      Tank Capacity:

    • 6 liters
  • eu birchmeier sprayer spray matic 5s - 6, smallFree Shipping

    Spray-Matic 5 S

    €444.36

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 5 liters
  • eu birchmeier sprayer maxi 1.0 - 1, smallFree Shipping

    Maxi 1.0

    €64.78

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 1 liter
  • eu solo sprayer 404 - 1, small

    404

    €10.95

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Solo

      Tank Capacity:

    • 2 liters
  • eu volpi sprayer micronizer jolly m5v35 - 1, small

    Micronizer Jolly M5V35

    €90.13

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Volpi

      Tank Capacity:

    • 5 liters
  • eu birchmeier sprayer fogger bobby 0 5 - 7, small

    Bobby 0.5

    €30.27

      Type of Apparatus:

    • Sprayers Hand

      Manufacturer:

    • Birchmeier

      Tank Capacity:

    • 0.5 liters

You can also choose to apply treatments directly to the exit holes found in the wood. Drione dust, which is based on pyrethrin, can be used. It is a light dust that can easily penetrate the holes made by the wasps, and it will affect the pests by dehydrating them. This will ensure that no wasps will enter that hole again, giving you the opportunity to find a way of sealing them with wood fillers or silicone sealant. It will also kill any eggs or larvae found in the wood galleries, ensuring they will not make their way out through a different tunnel.
To apply such powdered solutions, you can use hand dusters, but if you choose to use sprays, you can use aerosol insecticides. These will have a quick and powerful blast, making sure to fill the gallery created, and kill anything in its way. Even if eggs manage to hatch, the larvae will then come in contact with a lethal dose of insecticide, as it will be absorbed throughout the wood.

Fummer insecticides for Wood Wasps control:

Cypermethrin based products can also be used, as they act as insecticides and repellents for a number of insects. They are considered a broad-spectrum insecticide, killing beneficial insects as well as the targeted insects. Exposure to sunlight, water and oxygen will accelerate their decomposition, so reapplying it from time to time might be needed.

As an alternative method of removal for the wood wasps you see flying, you can use a hand-held zapper, or another type of electrical zappers placed on your deck. However, they will not solve the problem of your infested wood, as will only remove the flying adults that might escape the holes in the wood.

Once the horntails begin emerging, no treatments are needed as this process will soon be over. Pieces of wood that have been badly infested may require replacement or cosmetic repairs (to exit holes), but the wasps cannot reinfest the seasoned wood in homes and buildings. However, it is best to try and prevent such infestations from taking place. Make sure you only use fry, treated wood, and when dealing with firewood, make sure not to store it inside your house.

Got a question?

  1. We have found fifteen xiphydria mellipes in our house over a one-week period, after bringing in a framed piece of art that uses birch branches.

    Do you think we need to treat for this, or that it is likely to be ongoing? Could it be damaging to the house?

    Thanks for any help you can provide.

    Jill Schwendeman -
    Answer
    1. Wood wasps are generally not harmful to humans, as they do not sting. However, they can cause cosmetic damage to the wood they have infested. You can choose to apply treatments directly to the exit holes found in the wood. Pyrethrin based products will penetrate the holes made by the wasps, and will dehydrate the pests, kill any eggs or larvae found in the wood galleries, and ensure no other wasps will make their way out through a different tunnel. First use the product on a small portion of the wood, to make sure the insecticide does not stain it, if it is part of a piece of art, as you mentioned. You can try using one of these two products against the wood wasps.
      http://www.nexles.com/bayer-insecticide-aquapy-ew-30-1-litre.html
      http://www.nexles.com/pelgar-insecticide-cytrol-forte-wp-20-g.html

      Nexles -
      Answer

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