Drywood termites are secretive insects and are difficult to detect. They live deep inside wood and, except during periods when they swarm or when repair work is being done on infested homes, they are seldom seen. |
Because of the difficulty in detecting drywood termites and determining the extent of the damage done, do-it-yourself treatments are not recommended; consult a pest control professional. Over-the-counter products with drywood termites on the label for do-it-yourself enthusiasts do not exist. Except for wood removal, homeowners should seek help from pest control professionals. This publication is intended to provide homeowners with sufficient background information so that they can better discuss treatment options with pest control professionals; it is not intended as a treatment guide.
Colonies are small (usually fewer than 1,000 individuals), can be widely dispersed, and take years to mature. While a homeowner may initially detect the presence of termites when they swarm or if fecal pellets are discovered, inspecting for drywood termites and determining the extent of an infestation require experience.
The minimum requirement by California state law for drywood termite inspections includes visual searches of accessible areas. However, detection of difficult-to-find infestations may require removal of walls, paneling, and stucco as well as the use of ladders and scaffolds.
During a visual inspection for drywood termites, inspectors look for feeding damage, shed wings, termite fecal pellets, and kickout holes, which are small holes the size of BB shot through which termites push fecal pellets out of the wood. Fecal pellets, hexagonal in shape, are diagnostic for drywood termites. However, whether the infestation is currently active or what the extent of the infestation is cannot be determined from pellets alone. Cleaning up the fecal pellets around a kickout hole and checking a few days later to see if new pellets have appeared can help to determine if an infestation is active. (Building vibrations/movements may cause some pellets to appear.) If an active infestation of drywood termites is found in your structure, you should have it treated.
Other detection methods include the use of dogs, odor detectors, and feeding-sensitive (acoustic emission) devices, but these are infrequently used. Fiber optics, borescopes, and movement-sensitive devices using microwaves have also been tried, but their reliability has not yet been scientifically tested on drywood termites. Except for feeding-sensitive devices, most detection methods are still considered experimental because adequate research has not been conducted on their effectiveness. Visual searches by inspectors for evidence of termites and damage remain the mainstay of the industry.
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