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Old house borer

Old house borer

Hylotrupes bajulus

A species of Hylotrupes, Also known as European house borer, House longicorn beetle

Renowned for its elongated body and hardened protective wing cases, old house borer is a master of metamorphosis, transitioning from grub-like larvae that consume dead wood, to adults that nourish themselves on plant nectar and sap. These adults are characterized by distinctive antennae that can span up to twice the length of their body, underscoring their sensory adeptness in locating mates and resources within their habitat.

General Info About Old house borer
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Attributes of Old house borer
Adult Food Sources
Decaying wood material, wood with fungal decay, sapwood, bark areas with high resin content
Larva Food Source
Softwoods like pine, spruce, fir
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
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Distribution Area of Old house borer
This species, originating in Europe, and having been spread in timber and wood products, now has a practically cosmopolitan distribution, including Southern Africa, Asia, the Americas, Australia, and much of Europe and the Mediterranean.
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Life Cycle of Old house borer
Egg The old house borer begins life as an egg, often laid in clusters on a food source. The eggs are small and oval, with a protective outer layer that blends with the environment.
Larva Upon hatching, the larva of old house borer emerges as a long, cylindrical grub, voraciously feeding on organic material, often unseen. It grows rapidly, molting several times.
Pupal The old house borer’s transition to adulthood occurs within a pupa. Encased, it undergoes drastic transformation, reorganizing into an adult form, often in a hidden location.
Adult Emerging from the pupa, the adult old house borer’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Old house borer Larvae
Birds, rodents, lizards, carnivorous beetles, ants
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Predators of Adult Old house borer
Birds, rodents, bats, mantises, spiders
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Scientific Classification of Old house borer
Tips for Finding Old house borer
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Youth Habitat of Old house borer
Rotting and Decaying Matter, Urban and Suburban Areas, Agricultural and Cultivated Areas
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Adult Habitat of Old house borer
Forests and Woodlands, Urban and Suburban Areas, Agricultural and Cultivated Areas
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When is the Best Time to Observe Old house borer
The best time to find adult old house borer is during warm months, especially in the evening when they are most active.
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What is the Best Weather to Observe Old house borer
Look for old house borer on days that are warm and humid, which are ideal conditions for their activity outside their host material.
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How and Where Can You Find Old house borer at Different Life Stages
Larva Larvae of old house borer are found within wooden structures, especially softwoods. To find them, look for boreholes and frass on wooden surfaces, or listen for chewing sounds within infested timber.
Pupal Old house borer pupate within their wooden tunnels, often close to the surface. They may be found by carefully removing the surface layer of infested wood with a chisel or similar tool, taking care not to harm the specimen.
Adult Adult old house borer emerge from wood, often leaving exit holes. Check around old wood structures, piles of lumber, or dead trees at dusk. Adults are also attracted to lights at night, making them easier to spot.
Are Old house borer harmful?
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Harmful Effects of Old house borer
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Structural Pests

The larval stage of old house borer can cause severe damage as it bores through wooden structures. Adults continue this destruction, endangering the integrity of timber and flooring. Over time, infestations compromise the strength and safety of affected items, leading to costly repairs and replacements. Known for their elusive nature, these pests often go undetected until significant harm has occurred.

More Effects of Old house borer

Common Questions People Also Ask
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