Summer awakens pesky home pest: early signs of wood-boring insects require immediate action

Summer marks the peak activity period for wood-boring pests, a time when multiple stages of their life cycle converge within infested timber. Depending on the specific insect species, larvae that have been developing inside wood may transform into adults, chew their way to the surface, and emerge to mate. Females then lay eggs in cracks and under bark, initiating a new cycle where young larvae burrow deep into the wood.

This extensive development phase can last two to three years, during which the larvae continuously consume wood, creating dust and numerous cavities. Globally, approximately 1,500 species of wood-boring insects exist. While they play a beneficial role in nature by breaking down dead wood, they pose a significant problem in homes, furniture, and valuable wooden artifacts.

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In Lithuania, the house longhorn beetle, also known as the common house borer, is a frequent culprit, damaging structural elements such as walls, floor joists, doors, and window frames. Other species, like the violet powderpost beetle, also target these structures. Smaller items like furniture, window sills, and baseboards are often attacked by the common furniture beetle or, less frequently, the furniture beetle, which leave behind characteristic small, round holes.

In Lithuania, the house longhorn beetle (Hylotrupes bajulus), also known as the common house borer, is a frequent culprit, damaging structural elements such as walls, floor joists, doors, and window frames. Other species, like the violet powderpost beetle, also target these structures. Smaller items like furniture, window sills, and baseboards are often attacked by the common furniture beetle or, less frequently, the furniture beetle, which leave behind characteristic small, round holes.

Expert Liutauras Grigaliūnas from Dezinfa, a pest control company, notes that the activity of these pests is directly tied to air temperature, leading to reproduction waves. For instance, furniture beetles begin mating in May as temperatures rise, while longhorn beetles become more active in June. The current warmer weather means these processes are in full swing. Grigaliūnas also points out that some furniture beetles are colloquially called "deathwatch beetles" due to the rhythmic ticking sound they make at night while chewing wood or seeking mates. This sound, audible in quiet conditions, was historically misinterpreted as a harbinger of death.

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It is interesting that one of the furniture beetle species is called the deathwatch beetle in English. It got such a name because of its behavior, as at night, while chewing wood or looking for a mate, the beetle rhythmically taps its head against the walls of the hollow it has chewed. In ancient times, people watching over the sick at night, hearing that ticking in a quiet room, believed that it was the death watch counting down the final minutes of life. In reality, it is just a wood-chewing beetle, slowly destroying the house's structures.