The foreign grain beetle is more properly known as a fungus beetle because it is attracted to and feeds on fungi and molds. Preferred Pest Control3400 100th StreetUrbandale, IA 50322, © 2020 Preferred Pest. This field is for validation purposes and should be left unchanged. The foreign grain beetle is only about 1/10 of an inch in length, and is almost half the size of the closely related red flour beetle. Foreign grain beetle problems tend to appear in new homes (2 to 3 years old), following renovation of older homes, or in structures with moisture problems. Behavior. However, they actually feed on mold and fungi associated with stored grain, and the foreign grain beetle samples we receive most frequently come from newly constructed homes rather than grain bins. Monday through Friday: 7:00AM to 5:00PM, Please click here or call for Holiday Hours, 20 Trafalgar Square, Ste 423 They are attracted to light and may be seen flying around light fixtures and windows. Foreign grain beetle. Foreign grain beetles are strong fliers and often are first noticed when they emerge from damp wall voids, flying towards light in living areas. Foreign grain beetles thrive at warm, humid conditions and temperature will actually affect their life cycle. They aren’t attracted to the water itself, but rather the mold caused by the excess moisture. “Fungus Beetles.” Ohio State University Extension, Ohio State University College of Food, Agricultural, and Environmental Sciences, 19 Oct. 2011, ohioline.osu.edu/factsheet/HYG-2084-10. Foreign grain beetles are frequently a problem in new construction (less than 5 years old). The distinguishing characteristic of the foreign grain beetle adult (when observed under magnification) is the presence of a tiny knob or bump on each of the front corners of the thorax. Where/When: Found in homes, especially new construction, primarily during August and September. Besides being a nuisance, foreign grain beetles may generate liability issues in sensitive locations, such as food processing or handling places, hospitals, etc. Check to make sure there are no leaky pipes or excess moisture inside the home that would attract the new house beetle, and make sure to keep the moisture in your yard to a minimum. The lifecycle lasts two to four weeks, depending on the temperature and relative humidity. (508) 872-4420, 225 Cedar Hill Street, Ste 200 These insects are the foreign grain beetle. Note the knobs on the thorax (the segment behind the head). Once they struggle to find the moisture needed to survive, they move on to the next site. The good news is that these beetle populations tend to disappear on their own. Control. These insects are the foreign grain beetle. One odd thing about this beetle is that most of the specimens sent to this lab are collected from new homes. 910-660-0962 Possibly, because the wood, plaster, concrete and other building materials in new construction may not be completely dry and support a thin, invisible layer of fungi which attracts the beetles. It can complete development at temperatures between 20 and 35 °C. Therefore, early detection and management of this pest is critical. Adult foreign grain beetles are attracted to the mold and begin laying eggs on the surface of the wood. To give you a better idea of the size, our technician took a comparison photo of the foreign grain beetle next to a pen. In Lancaster County, the 4-H youth development program is a partnership between Nebraska Extension and the Lancaster County government. The foreign grain beetle is found in tropical and temperate regions. Furthermore, larvae need high humidity to survive. Andover, MA 01810 While a pest infestation is never ideal, the good news is that foreign grain beetles are not destructive to your home. They may even call a pest management professional to control the infestation. While relatively small, foreign grain beetles are noticeable. Potter, Mike. Foreign grain beetles thrive on moldy growth on spilled grains, damp stored grain, musty cereal products, or molds on bins inside warehouses, mills, and food-handling facilities. This beetle infestation is often misidentified–which is a costly mistake because treatments in new homes are generally ineffective and not recommended. Merchant, Michael. These rounded projections are the primary features that identify this species. South Dakota State University, South Dakota counties, and USDA cooperating. Foreign grain beetles are covered in short, fine hairs plus dimple-like punctures. Foreign grain beetles can also be associated with plumbing leaks, condensation problems, or poor ventilation. Plumbing leaks, poor ventilation, and high humidity also increase the risk of having foreign grain beetles. They invade where leaks, floods, or other moisture problems have caused fungus to grow. It may or may not apply in your area. Preferred Pest’s expert gathered a sample, and after further inspection under a microscope, our entomologist identified the bug as a foreign grain beetle. They feed on mold spores and hyphae of fungi so damp, humid conditions are ideal. If foreign grain beetles are found in your home, it is generally easy to control by getting the moisture levels under control The worst part of an infestation is ensuring that the mold is taken care of.
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