Formosan Termites: A Growing Threat
The Formosan subterranean termite (Coptotermes formosanus) strikes fear in the hearts of homeowners, particularly residents of Hawaii and the southern United States. According to a report by the Department of Agriculture, it is one of the most destructive pests in the country.
Posted — UpdatedDespite persistent myths to the contrary, Formosan termites can’t chew through concrete and aren’t able to leap tall buildings in a single bound. Even so, they’re often referred to as “super-termites” because they’re aggressive, able to build nests above ground, and form extremely large colonies. While native termite colonies often number in the hundreds of thousands, Formosan colonies include millions of individuals. One Formosan queen can live as long as 20 years and lay as many as 2,000 eggs a day.
The best way to prevent an infestation of Formosan termites is to make your home uninviting by cutting off their access to food and water. To accomplish this goal:
- Remove dead trees as well as scrap wood, paper, and cardboard from your yard.
- Prevent wood from coming into direct contact with bare ground around your home.
- Use pressure-treated wood for structures at or near ground level.
- Anchor wooden posts for fences, decks, porches, and sheds in cement.
- Eliminate wooden planters, tubs, trellises, and stakes.
- Keep plants and landscaping materials at least a foot away from buildings.
- Avoid using wood chips for mulch close to the house.
- Install and maintain rain gutters to direct water away from the walls and roof of the house.
- Add downspout extenders to deliver runoff at least a foot away from the foundation.
- Repair leaks in outdoor faucets, indoor fixtures, water lines, drains, and appliances immediately.
Early detection leads to early treatment, which is critical. Entomologists at the University of Hawaii have found that a colony of Formosan termites can do significant structural damage in as little as six months. If you live in or near affected areas, inspect your home and property at least once a year for the following signs:
- Shelter Tubes: Formosan termites don’t like to be exposed, so they build shelter tubes to travel between their nest and sources of food and water. Check the foundation, as well as any wood near the ground, for signs of tubes.
- Water Source: Examine areas surrounding outside faucets and water lines. Inside, inspect areas where moisture is found, such as kitchens, bathrooms, and laundry rooms.
- Damage: Look for pinholes in drywall and evidence of damage to wood in any location, even the tack strips under carpeting.
- Nests: Formosan termites build large nests made of a rock-like mass. Most of these nests are built below ground, but not all nests have contact with soil. Probe any suspect areas with an awl or screwdriver, and check any wood that feels soft or hollow. Look for bulges or depressions, discolorations, and spongy wood. Check cracks in stucco or plaster, and knots in trees.
Put any suspect insects you find in small bottles filled with rubbing alcohol and take them to a trusted exterminator, county extension office, or university entomology department for identification.
There are two basic types of control available: soil termiticides and bait. A reliable exterminator should consult you and discuss all the options before making a decision about treatment.
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