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Brief Summary

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The old-house borer (Hylotrupes bajulus) is a species of wood-boring beetle in the family Cerambycidae (longhorn beetles). Its larvae are pests of construction lumber and also infect dead wood in plantations. Originating in Europe, the old-house borer now has a worldwide distribution, including the Mediterranean, South Africa, Asia, USA and Canada, and Australia. In 1970, this pest was eradicated from Eastern Australia, but in 2004 it was found in Perth, Western Australia. A huge eradication campaign is underway and with hopes to contain the pest before it spreads with activities such as: door-knock surveys to locate potential pests, public education and report hotline, inspections of roofs in contaminated areas, trap pole placements, and training of detector dogs to recognize specific boring frequencies in lumber. Only the old-house borer larvae feed on wood. Larvae prefer seasoned softwoods, particularly pine but also Douglas fir, and take two or three or more years to mature, depending on the moisture content of the wood. Larvae usually mature in the spring, and the mature adults then cut exit holes 6–10 mm in diameter. Because the beetle has a long life cycle and one generation is not sufficient time to cause major structural damage, containing the population in this first generation can be very effective for reducing loss. Treatment of building lumber is very important in reducing spread and infestation of beetles in structures. Adults are black or brown with grayish "hair" on their upper bodies and elytra (wing cases), and have shiny spots that resemble eyes. They are most active in the summer. (Australian department of agriculture and food 2011; Wikipedia 2011)
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Hylotrupes

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Hylotrupes is a monotypic genus of woodboring beetles in the family Cerambycidae, the longhorn beetles. The sole species, Hylotrupes bajulus, is known by several common names, including house longhorn beetle, old house borer,[1] and European house borer.[2] Originating in Europe, and having been spread in timber and wood products, the beetle now has a practically cosmopolitan distribution, including Southern Africa, Asia, the Americas, Australia, and much of Europe and the Mediterranean.

Hylotrupes bajulus preferentially attacks freshly produced sapwood of softwood timber, in Australia particularly pine, so, contrary to the name "old-house borer", the species is more often found in new houses; maybe because the beetles are attracted to the higher resin content of wood harvested more recently than 10 years earlier. If old wood is attacked, the damage is usually greater. As the nutrient content of wood decreases with age the larva has to consume larger amounts of wood.[3] In Australia the infection of home construction is mainly caused by the use of wood already infected with the eggs or larvae of the beetles if the wood is not properly kiln-dried in production.[4][5]

The life cycle from egg to egg typically takes two to ten years, depending on the type of wood, its age and quality, its moisture content, and also depending on environmental conditions such as temperature. Only the larvae feed on the wood. Larvae usually pupate just beneath the wood surface and eclose in mid to late summer. Once the exoskeleton of the newly emerged adult beetle has hardened sufficiently the adults cut oval exit holes 6–10 mm (¼ to 3/8 in) in diameter, typically leaving coarse, powdery frass in the vicinity of the hole.[6] Adults are most active in the summer. They are brown to black, appearing grey because of a fine grey furriness on most of the upper surface. On the pronotum two conspicuously hairless tubercles are characteristic of the species.

Gallery

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    Adult

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    Larva

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    Larvae exposed in infested wood

References

 src= Wikispecies has information related to Old-house borer  src= Wikimedia Commons has media related to Hylotrupes bajulus.
  1. ^ Hylotrupes bajulus. Pest Insects of our Cultural Heritage.
  2. ^ European House Borer. Department of Agriculture and Food, Government of Western Australia.
  3. ^ Körting, A. (1961). Zur Entwicklung und Schadtätigkeit des Hausbockkäfers (Hylotrupes bajulus L.) In: Dachstühlen verschiedenen Alters. Anzeiger für Schädlingskunde, 34(10), 150-153.
  4. ^ Grimm, M. (2005). Incursion of Hylotrupes bajulus Linnaeus (European House Borer) into Western Australia. The International Research Group on Wood Protection. IRG/WP 05-10558.
  5. ^ Grimm, M., et al. (2009). European House Borer Hylotrupes bajulus Linnaeus in Western Australia: the anatomy of an eradication program. The International Research Group on Wood Protection. IRG/WP 09-20403.
  6. ^ The Old House Borer, Penn State Department of Entomology web site
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Hylotrupes: Brief Summary

provided by wikipedia EN

Hylotrupes is a monotypic genus of woodboring beetles in the family Cerambycidae, the longhorn beetles. The sole species, Hylotrupes bajulus, is known by several common names, including house longhorn beetle, old house borer, and European house borer. Originating in Europe, and having been spread in timber and wood products, the beetle now has a practically cosmopolitan distribution, including Southern Africa, Asia, the Americas, Australia, and much of Europe and the Mediterranean.

Hylotrupes bajulus preferentially attacks freshly produced sapwood of softwood timber, in Australia particularly pine, so, contrary to the name "old-house borer", the species is more often found in new houses; maybe because the beetles are attracted to the higher resin content of wood harvested more recently than 10 years earlier. If old wood is attacked, the damage is usually greater. As the nutrient content of wood decreases with age the larva has to consume larger amounts of wood. In Australia the infection of home construction is mainly caused by the use of wood already infected with the eggs or larvae of the beetles if the wood is not properly kiln-dried in production.

The life cycle from egg to egg typically takes two to ten years, depending on the type of wood, its age and quality, its moisture content, and also depending on environmental conditions such as temperature. Only the larvae feed on the wood. Larvae usually pupate just beneath the wood surface and eclose in mid to late summer. Once the exoskeleton of the newly emerged adult beetle has hardened sufficiently the adults cut oval exit holes 6–10 mm (¼ to 3/8 in) in diameter, typically leaving coarse, powdery frass in the vicinity of the hole. Adults are most active in the summer. They are brown to black, appearing grey because of a fine grey furriness on most of the upper surface. On the pronotum two conspicuously hairless tubercles are characteristic of the species.

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