The lifecycle lasts two to four weeks, depending on the temperature and relative humidity. Foreign grain beetle adults are reddish-brown in color. Shetlar, David J. Female foreign grain beetles prefer to lay eggs in places with fungal growth capable of supporting larval development. These insects are the foreign grain beetle. (508) 872-4420, 225 Cedar Hill Street, Ste 200 Eventually larvae go through several stages and emerge as adult beetles from behind baseboards, electrical outlets and light fixtures. They can enter your home through open windows and doors. This is because the building materials (sheetrock, plaster, caulking, plywood) used to create the structures tend to be damp and harbor trace amounts of … All About The Tiny Jumping Bugs in The Sink, Best Time to Clean Gutters to Avoid Pests in The Gutter, If the wood used to build the home was left outdoors, it was likely exposed to rain before or during construction, Rain could have blown into the house throughout the project, bringing moisture in the house before it was “closed in”, There’s moisture built up from the drywall compound put over the sheetrock. Adult foreign grain beetles are attracted to the mold and begin laying eggs on the surface of the wood. Preferred Pest’s expert gathered a sample, and after further inspection under a microscope, our entomologist identified the bug as a foreign grain beetle. Owners of new homes may become aware of an infestation when the foreign grain beetles begin to come out from under baseboards. Foreign grain beetles undergo a complete metamorphosis, in which there are four distinct stages: eggs, larvae, pupae, and adults. Surf City, NC 28445. Monday through Friday: 7:00AM to 6:00PM The information was updated November 2015 by Soni Cochran, Extension Associate. Our experience is infestations in older homes are not very common and infestations are nearly always found in new houses, often in rural settings. This will prevent more mold growth as well as reduce the foreign grain beetle population. Note the knobs on the thorax (the segment behind the head). See Preferred Pest Control's Coronavirus Action Plan. The foreign grain beetle samples we receive most frequently come from newly constructed homes rather than grain bins. Bedford, NH 03110 The infestation, which is probably nearly unnoticeable because of the tiny size of these insects, continues even after drywall and plaster is added to the walls. Fall is the time to control tough perennial broadleaf lawn weeds. Please check your local building code and consult with professionals as needed. Behavior. Fungicides are often used to treat the mold, however, pesticides generally aren’t effective for treating foreign grain beetles. These tiny beetles can be major pests in new construction where building materials such as lumber and drywall remain damp for some time (see Renovation Brings Fungus Beetle Problem). Marlborough, MA 01752 Where/When: Found in homes, especially new construction, primarily during August and September. Foreign grain beetles, a type of fungus beetle, are usually a camel brown color and approximately 1/16 inch long. It can be difficult to locate the source of a foreign grain beetle infestation since they can be in almost anywhere from moldy wallpaper to moist window cases. These rounded projections are the primary features that identify this species. Portsmouth, NH 03801 There is a 0% survival rate at 66% relative humidity level. It feeds on mold and fungi, which is why this bug is sometimes referred to as the “fungus” beetle. Foreign grain beetles are covered in short, fine hairs plus dimple-like punctures. More information on Foreign grain beetles One odd thing about this beetle is that most of the specimens sent to this lab are collected from new homes. We’ll send a trained inspector out right away. Check packages at the back of the shelf that are past their “Use by” date. 910-660-0962 If you notice any strange bugs inside your home or you’d like a trained entomologist to identify the insects found in your home, contact the experts at Preferred Pest Control. Foreign Grain Beetles. In Lancaster County, the 4-H youth development program is a partnership between Nebraska Extension and the Lancaster County government. In older homes, foreign grain beetles can be found in damp basements, around rotting windowsills, under moldy wallpaper and on moist surfaces near leaky faucets. 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. Potter, Mike. “Fungus Beetles.” Ohio State University Extension, Ohio State University College of Food, Agricultural, and Environmental Sciences, 19 Oct. 2011, Mold-feeding insects range from booklice (psocids), to springtails, to various fungus beetles. A beetle infestation will subside once moist conditions are addressed and dried out. They are attracted to light and may be seen flying around light fixtures and windows. It breeds quickly, completing its cycle from egg to adult in as little as 30 days. If you put this beetle under a microscope or hand lens, you might notice this beetle has clubbed antennae and noticeable bumps on the front corners of the thorax. The adults that emerge from wall voids and other spaces inside new construction are generally unsuccessful at beginning another generation indoors. Some parts of this site work best with JavaScript enabled. Andover, MA 01810 The foreign grain beetle is most active in early summer to late fall when humidity levels reach their peak. Foreign grain beetles are found most often not in grain storage buildings, but in areas of new construction. Control. “Foreign Grain Beetle.” Entomology at University of Kentucky, University of Kentucky College of Agriculture, Food, and Environment, Apr. The good news is if you can find the source of the excess moisture and can repair or dry out the area, you’ve also solved your beetle problem. 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. Preferred Pest Control3400 100th StreetUrbandale, IA 50322, © 2020 Preferred Pest. Foreign grain beetles are found most often not in grain storage buildings, but in areas of new construction. Foreign grain beetles often move into old water-damaged houses or new homes during construction to eat mildew. Foreign grain beetles can also be associated with plumbing leaks, condensation problems, or poor ventilation. Call us at (515) 276-7277 or schedule an appointment online to get in touch with our Des Moines pest control company today! Foreign grain beetles are often found in damp stored grain, spilled grain, and musty cereal products in grain mills and food processing plants. They are often attracted to light and, being strong fliers, will spread to all rooms of the house. Fungus beetle problems can be seasonal, building up in warm, humid weather and dropping off naturally during periods of cooler, drier weather. The best method of treatment is to vacuum and wait patiently because the infestation should go away by itself. Photo: CSIRO [CC-BY-3.0], via Wikimedia Commons, 32 Lake Ave They may even call a pest management professional to control the infestation. The moisture problem could be from a roof leak, leaky windows or skylights, a plumbing leak, unseasoned wood or other damp building materials, or just from excess condensation. No insecticide application is necessary. When homes have a mold problem, they often also have infestations of insects that feed on mold. Foreign grain beetles are frequently a problem in new construction (less than 5 years old). The beetles are not limited to mold on grain or foods; they are found in many other situations where mold is growing on damp surfaces. This field is for validation purposes and should be left unchanged. The foreign grain beetle is most likely to be discovered from late July to September, especially after a period of heavy rain. This beetle infestation is often misidentified–which is a costly mistake because treatments in new homes are generally ineffective and not recommended. Mated males and females of foreign grain beetles live an average 159 and 208 days, respectively; while unmated males and females live 275 and 301 days, respectively. Foreign grain beetles are also commonly found in new construction homes where there is often uncured wood, moist sheetrock or freshly plastered walls. Foreign grain beetles thrive at warm, humid conditions and temperature will actually affect their life cycle. Their name implies that they are a pest of grain; however, they actually feed on the mold and fungi associated with stored grain. Therefore, early detection and management of this pest is critical. Figure 1. Questions? These beetles have been nicknamed "plaster beetles" by home builders, because they appeared inside rooms of new buildings that had just been plastered.