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Termites: Always A Scary Discovery

Autumn is the time of year for termite swarms as adult winged termites (called alates), leave their colonies, mate, and establish new colony sites. Residents often see the swarms around their neighborhood or find discarded wings and dead termites scattered on the ground or caught in spider webs. Only a very small proportion of termites are successful in establishing a new colony. Finding large numbers of termite alates near or especially inside a building can indicate a need for a termite inspection by a pest control company that specializes in structural control, although the presence of swarming termites outside does not necessarily indicate that a nearby structure has an infestation.

In California, three types of termites are present: dampwood, drywood and subterranean. Dampwood and drywood termites both live in wood, but as their names suggest, dampwood prefers moist and typically decayed wood, whereas drywood can live in dry wood such as lumber or utility poles. Dampwood termites look similar to drywood termites but are larger and attracted to light which sometimes leads to an accumulation of alates on porches, entryways, or other areas with outside lights. The two species also have different shaped fecal pellets; an accumulation of small piles of sawdust-like material which serves as their feces. Both drywood and dampwood termites swarm in summer or fall and in the month of September, several residents submitted drywood termite alates for identification at the District laboratory. are A sign that a house is infested with drywood or dampwood termites is an accumulation of fecal pellets near an entry point such as the base of a structure or a hole in wood.

After the first fall rains, usually in October, subterranean termites will swarm. Most subterranean termites live outdoors – near fallen logs, tree stumps and other dead wood. They require a moist environment, and nest within the soil. When subterranean termites colonize inside a house or other structure, they can cause considerable damage. Signs of termite damage, such as tunneling or darkening of the wood or seeing live soldiers or workers, warrant an inspection by a structural pest control company. Effective liquid insecticides and baits are only available to licensed professionals. Homeowners should not undertake management of subterranean termite infestations on their own.

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