Ivory Marked Longhorn Borer In My House

Ivory Marked Borer taken with canon t2i, mpe 65mm (3.5X… Flickr
Ivory Marked Borer taken with canon t2i, mpe 65mm (3.5X… Flickr from www.flickr.com


Have you ever encountered an infestation of the ivory marked longhorn borer in your house? If not, consider yourself lucky. This pesky insect has been causing homeowners all over the country major headaches. In this article, we will discuss what the ivory marked longhorn borer is, its behavior, and how to deal with an infestation.

What is the Ivory Marked Longhorn Borer?

The ivory marked longhorn borer, scientifically known as Eburia quadrigeminata, is a species of wood-boring beetle. It is native to North America and is commonly found in the eastern parts of the United States. This beetle gets its name from the distinctive ivory-colored markings on its body.

Life Cycle and Behavior

The life cycle of the ivory marked longhorn borer begins when the female beetle lays her eggs on the bark of trees. The larvae hatch from these eggs and burrow into the wood, where they spend the next several years feeding on the inner layers. As they grow, they leave behind telltale signs such as small exit holes and sawdust-like frass.

Once they have reached maturity, the adult beetles emerge from the wood and seek out new hosts to lay their eggs. They are attracted to freshly cut or wounded trees, making them a common problem in areas where construction or tree pruning has recently taken place.

Signs of Infestation

If you suspect that you have an infestation of ivory marked longhorn borers in your house, there are a few signs to look out for. The first and most obvious sign is the presence of small exit holes in wooden surfaces. These holes are typically round and about 1/8 to 1/4 inch in diameter.

Another sign of infestation is the presence of frass, which is the sawdust-like material left behind by the larvae as they feed. This frass can often be found near the exit holes or on surfaces underneath wooden items.

Prevention and Treatment

Preventing an infestation of ivory marked longhorn borers is the best course of action. This can be achieved by keeping firewood and other wooden items off the ground and away from your house. Additionally, inspecting newly purchased wood for signs of infestation is crucial to avoid introducing these pests into your home.

If you already have an infestation, treatment options include using insecticides specifically designed for wood-boring beetles. It is important to follow the instructions carefully and wear protective gear when using these products. In severe cases, it may be necessary to consult a professional pest control company for effective eradication.


The ivory marked longhorn borer may be a small insect, but it can cause significant damage to your home if left unchecked. By being aware of the signs of infestation and taking preventive measures, you can protect your house from these destructive pests. Remember, early detection and prompt action are key to minimizing the damage caused by wood-boring beetles.