A beetle infestation will subside once moist conditions are addressed and dried out.When found in older homes, the source is most likely water leaks or other moist conditions that are supporting fungus growth, such as a poorly ventilated attic or crawl space. This beetle is almost always found to be a pest in newer homes.Check for signs of an infestation in food items or areas where there is excess moisture.Food products attacked include cereal grains, flours, beans, dates, figs, biscuits, yams, tobacco, cocoa, groundnuts, copra and palm kernels. As a food pest, it is not a great economic concern because it only attacks grain products that are moist, moldy and out of condition. This same phenomenon may also be encountered in older buildings or other buildings where poor ventilation, water leaks or poor drainage create conditions promoting fungal and mold growth.Ī worldwide pest, foreign grain beetles are fungus feeders and are even capable of surviving on pure mold cultures. The foreign grain beetles also die however, treatments may be needed in those situations where large numbers are being seen. It dies after the wood finally dries out, but one to three years may pass before this occurs. Fortunately, the fungi in the walls are not damaging to the wood. Initially, only a few beetles may be seen, but when hundreds begin to emerge, homeowners may become annoyed and even panic-stricken and will call a pest management professional for help. As strong fliers, the tiny foreign grain beetles spread to all rooms of the house. Larvae may also be found on floors near baseboards where adult beetles are found. Beetles then begin to emerge by the hundreds from under baseboards, from behind electric outlets and from around light fixtures in ceilings. After a period of many months to more than one year, the population of these beetles within the walls grows large. Foreign grain beetles will then enter the walls of homes from the outside and begin feeding and breeding on these surface fungi. If enough moisture has accumulated on the wood, surface fungi may grow on the studs inside the walls. As a home is being constructed, rain and moisture inevitably fall onto exposed beams prior to the roof and walls being added. Many homeowners are introduced to this beetle when purchasing a new home that’s only one or two years old. In such situations, thousands of beetles are forced out of the breeding source in search of fresh media. Huge populations are not uncommon under optimum conditions. It requires moist conditions and develops only when the relative humidity is above 65 percent. It breeds quickly, completing its cycle from egg to adult in as little as 30 days. Behavior: The biology of the foreign grain beetle is not well known.
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