In the late summer, adults become obvious when they emerge from the wall voids and are attracted to lights. To control these beetles, wet wood and the moisture source should be eliminated. Increasing ventilation with air conditioners or fans may be needed to remove the moisture. Often, homes will dry out naturally in 1-4 years thereby eliminating the fungal food source and hence the beetles. Pyrethrin sprays can kill the adults, but need to be applied frequently as the beetles continue to emerge from wall voids.
Vacuum cleaners work just as well as sprays to remove any visible beetles that are present.
Pest control companies may be able to provide additional relief by locating the infested wall areas or source of dampness by using a moisture meter or by inspecting areas where the beetles are most abundant. A residual aerosol or dust can then be injected into cracks and crevices along baseboards and into the wall voids. Remember that foreign grain beetles are a nuisance by their mere presence. They do not bite or damage wood, fabric or stored food that is in sound condition. Foreign grain beetles alert.