Old House Borer

Depending on the habitat and climate, these beetles can live between 2 to 10 years, often staying in their larval stage for several years, making them extremely dangerous to wooden structures.
Old House Borer Scientific Classification
Scientific name
Hylotrupes bajulus
Old House Borer Physical Characteristics
Dark Brown, Light Grey
2 to 10 years
Old House Borer Distribition

These beetles are referred to as parasites as a result of their hazardous capacity to damage timber. Older house borers are 2nd just to termites in regards to the damages they trigger. Nonetheless, in spite of its name, the old house borer chooses more recent timber. This is since fresher timber has a greater material web content.

These beetles were initially determined in 1758 by Carl Linnaeus, a renowned Swedish botanist. They are the only participant of their genus.

Woodboring beetles are divided right into 2 teams; the old house borer generally feeds upon softwood lumber like want. The 2nd team is powderpost beetles, and they like bamboo and woods. If these beetles attack your residence, they can trigger serious architectural damages if left unattended for a prolonged quantity of time.

Old House Borer Species, Kind, and Scientific Name

Old house borers are woodboring beetles with numerous typical names, such as longhorn beetle and European house borer. Furthermore, South Africans call this timber- damaging sampling the Italian beetle since they showed up in packaging instances sent out from Italy.

Their scientific name is Hylotrupes bajulus, and they come from the order Coleoptera. There more than 250,000 species in Coleoptera, making it the biggest order in the class Insecta. Due to the fact that the order is so big, there is a vast variety pertaining to biology, dimension, actions, and qualities.

Nonetheless, the participants of this order do have a couple of similar qualities, like 2 collections of wings. They have a set of filmy back wings and a set of elytra, which are difficult front wings.

These beetles are extremely versatile and can grow in almost every kind of environment, consisting of marine systems and deserts.

Old house borers are participants of the Cerambycidae family, which are lengthy- horned beetles with extended bodies and worsened eyes. Their bodies are divided right into 5 fractional tarsi. Nonetheless, the 4th sector is small and well concealed.

Several participants of this family are nighttime; nevertheless, they are typically discovered feeding on blossoms. Their larvae are usually legless, white, and woodboring.

Appearance: Exactly How To Recognize Old House Borer

Grownup old house borers are usually 1 inch long and have a dark brownish coloring. They have lengthy antennae, typically a 3rd of their body size. Simply behind their heads, they have 2 glossy black bumps and plain grey spots on their reduced back.

Nonetheless, grown-up beetles are not the trouble. They are seldom located in timber. If there is a discovery, it’s typically near a light or home window. The larvae are the ones doing all the injury, and they stay concealed in the timber while they create.

If they are eliminated from the timber, they can be determined by the 3 tiny eyespots on both sides of the head. So one eyespot gets on either side of their heads, it is a much less damaging species. Nonetheless, seeing these attributes needs a magnifying glass or microscopic lense.

Environment: Where to Locate Old House Borer

Old house borers came from Europe yet quickly infected the majority of continents with profession, and currently happen in:

  • Asia
  • Australia
  • The United States And Canada
  • South America
  • Africa

They make their houses in timber, as their name shows. Nonetheless, it’s not old timber they desire; they like more youthful timber abundant in healthy protein, like sapwood. So, usually big invasions are generally in frameworks ten years old or more youthful.

Their environment of choice is softwoods like:

  • Pine
  • Fir
  • Spruce

And they will certainly stay clear of timbers like maple, ash, oak, or poplar.

Remarkably, the old house borers in The United States and Canada just live in lumber and structures; they will certainly not damage trees, fire wood, or stumps. Rather, they generally get in structures by infesting the lumber on a building website, usually where the timber was saved, refined, or grated.

The females will certainly lay about 200 eggs in joints, gaps, and fractures in the timber. Within a couple of weeks, the eggs start to hatch out, and the larvae begin to feed by tiring right into the timber. They have a lot of time to stay low-profile as they expand gradually, gradually triggering even more damages as they create.

Diet: What Do Old House Borer Eat?

The very best diet for old house borer larvae is s young sapwood. Nonetheless, the older the tree, the less nutrients it has, and the larvae will certainly need to eat even more to live.

Life Process of Old House Borer

Larvae hatch after the grownups lay propel revealed timber surface areas. As quickly as they hatch out, they begin to prey on the timber, developing little passages. They are white in shade and approximately 1.4 inches long when totally mature.

Depending upon the environment and environment, these beetles can live in between 2  to ten years, typically remaining in their larval phase for numerous years, making them incredibly unsafe to wood frameworks.

Once the larvae prepare to pupate, they begin to make their means to the surface area of the timber. And ultimately, they will certainly eat themselves bent on discover a friend.

Indications of an Energetic Invasion

Once the larvae hatch out and begin to prey on the timber, they produce destructive passages. As they relocate better right into the passages, they leave frass (waste matter and timber pieces), which usually splash from the leave opening and be up to the flooring. This will certainly be the very first indication of invasion.

You will certainly understand if the invasion is energetic if this great dirt shows up a couple of weeks after you at first cleansed it up.

An additional sign would certainly be the wearing or clicking sounds the larvae make while preying on the timber. These noises can typically be listened to in late springtime or very early summer season when there is great deals of dampness airborne. Having a stethoscope about will certainly can be found in convenient if this holds true.

Finally, the grownups will certainly make rough leave openings when eating their escape of the timber. The opening is usually oblong and concerning a 4th of an inch large.

Avoidance: Exactly How to Remove Old House Borer

It is important that you evaluate any type of lumber and timber frameworks in your house for openings typically. Nonetheless, dealt with and air- dried out timber is much less at risk to invasions. This consists of fire wood that requires to be debarked, split, and saved far from the residence.

Larvae grow on moisture, so by mounting these things in your house, you can stop a problem:

  • Air Flow
  • Dehumidifiers
  • Drain systems

Protect against the grownups from laying eggs in revealed locations by using shellac, paint, and timber varnish. Furthermore, you can stop invasion of neglected timber by using borax- based items.

Various Other Woodboring Beetles

Old house borers are not the only timber- damaging beetles; various other species consist of:

Bark Beetles

Bark beetles are black in shade and acquired their name since they are understood for harmful and damaging trees in woodlands throughout The United States and Canada.

However, timber is not the only food resource in their diet; they likewise eat floral plants, fruits, and seeds. They come from the family Scolytinae, which includes around 247 category and over 6000 species.


Weevils are conveniently distinct by their extended noes. There are around 97,000 species worldwide, separated right into several households. Some species consist of:

  • Wheat weevils ( Sitophilus granarius)
  • Rice weevils ( Sitophilus oryzae)
  • Boll weevils ( Anthonomus grandis)

Out of these 3 species, the rice weevil is the most significant parasite, triggering one of the most devastation.

Apartment Metallic  Borers

There are 15 500 species of level metal borers in 775 category. They are preferred among insect collection agencies as a result of their plus size and brilliantly tinted bodies. Furthermore, their coverings are typically utilized to make beetle wing precious jewelry in nations like Thailand, India, and Japan.

They have a tendency to grow in nonessential, and their larvae will certainly create with numerous phases while inside the timber.


  1. Orkin Canada, Available here: https://www.orkincanada.ca/pests/beetles/old-house-borer-beetles/
  2. Aiken Pest, Available here: https://www.aikenpest.com/old-house-borers
  3. Beetle Infestations, Available here: https://beetleidentifications.com/old-house-borer-beetle/
  4. Colonial Pest, Available here: https://www.colonialpest.com/2016/05/13/serious-old-house-borer-infestation-home/
  5. Wikipedia, Available here: https://en.wikipedia.org/wiki/Hylotrupes
  6. IUCN Redlist, Available here: https://www.iucnredlist.org/species/157532/5089899#geographic-range

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