“Powderpost beetle” is a term used to describe several species of small (1/8-3/4 inch long) insects that reduce wood to a flour-like powder (Figure 1). Most commonly, infestations of Anobiid powderpost beetles are found in structural timbers made of softwood, such as beams, sills, joists, studs, subflooring and plywood. Powderpost beetle larvae spend months or years inside wood while developing, feeding mainly on the starch content. The exit holes are small pencil lead size holes, usually all the same size. If your expectations are not met, we guarantee a full refund of your service payment. Call the Powderpost Beetle help line at 1-800-877-7290 for further assistance. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. The largest powderpost beetle infestations usually result from using wood that was improperly stored outdoors. They are considered pests and attack deciduous trees, over time The beetles themselves are seldom found, because they are small and active mainly at night. Powderpost Beetles will also tunnel into the wood of your home and furniture. Be sure to read and follow all the instructions and safety precautions found on the pesticide label before using any pesticide. It may used as as a liquid, foam or dust, and provides long term protection against insects(drywood and subterranean termites, wood boring beetles, carpenter ants and decaying fungi. Unheated buildings, very damp basements, barns, seasoned firewood, and lumber stored outdoors are most often attacked. True Powderpost Beetles (Lyctidae) damage is characterized by: Presence of extremely fine, flour like powder falling from the surface holes. Frass; Generally, seeing exit holes that are the same color as the wood surrounding the holes indicates an old, inactive infestation. Mistakes also are made in determining whether the infestation is active, and if so, how it should be managed. They are capable of re-infesting dry, seasoned wood year after year. Powderpost beetle larvae feed inside the wood and create tunnels and galleries packed with powdery frass (excrement). The larvae need wood with a high moisture content to survive; old, untreated wood is the most commonly attacked. The insects overwinter in wood and are largely inactive most of the year. Unheated buildings, very damp basements, barns, seasoned firewood, and lumber stored outdoors are most often attacked. They can be introduced as eggs or larvae in firewood or wood that has been stored. Upon hatching, larvae bore into wood, begin to feed and finally become adult beetles that bore round exit holes about 1/8 inch in diameter. The term powderpost beetle refers to several species of wood-destroying beetles that belong to three different families of beetles (Lyctidae, Bostrichidae and Anobiidae).They re-infest dry, seasoned wood year after year and the wood becomes completely riddled with holes and galleries packed with powdery frass. There are many species which thrive in wood measuring just 8-10% moisture which is far below the 20% guideline most kiln drying processes attempt to reach. They may also leave piles of powdery frass below. 3. Pest control professionals can effectively manage and control powderpost beetle populations and take the necessary precautions to prevent infestations from recurring. Homeowners often receive conflicting opinions as to whether the "damage" they are seeing is indeed powderpost beetles. These small holes are usually the size of a pencil tip, or 1 to 3 mm in diameter. Their common name is derived from their fine, powdery frass (excrement) that accumulates under infested wood. Key Points. Pest control professionals are the only option to effectively manage and control powderpost beetle populations and take the necessary precautions to prevent infestations from recurring. Powderpost beetles can also be controlled by sealing the surface of the wood with shellac, paint or varnish which discourages female powderpost beetles from laying eggs on these surfaces. For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu. In addition, Anobiids will infest hardwood furniture, wall paneling, window and door molding, hardwood floors, and furniture. There Are “False” Powderpost Beetles. Unable to process lignin and cellulose, the insects avoid any wood materials other than sapwood. Damage caused by the powderpost beetle is usually first detected with the appearance of holes in wood, 1/32 – 1/16 inch-diameter, from which a very fine sawdust may fall. Tags: beetles, msu plant & pest diagnostics, pest. Powderpost Beetles. The worst powderpost beetle infestations are typically due to the use of old wood from barns or wood piles, that was improperly stored outside, in DIY projects. Powderpost beetles are a type of bug with several interesting characteristics. Like all types of insects, there are different families within the order. Powderpost beetles in and around the home J. DeAngelis T he common name powderpost beetle loosely applies to three closely related beetle families, Lyctidae, Anobiidae, and Bostrichidae. Usually, powderpost beetles produce one generation a year. The appearance of powder does not necessarily indicate an active infesta- tion. And though 15-20% is good for keeping away most insects, it won't thwart powderpost beetles. As full-grown adults, powderpost beetles generally live for another two to five weeks. Frass is a mixture of powderpost beetle larvae excrement and miniscule wood particles that falls out of the exit holes the adult insects make as they emerge. Remove the wood and examine it closely to confirm the presence of live insects. Bora-Care can be purchased from an outfit in Maryland called PRG (short for Preservation Resource Group) at (301) 309-2222. Powderpost beetle is a term used to describe several species of small (1/8-3/4 inches long), wood-boring insects which reduce wood to a fine, flour-like powder. It’s made up of tiny wood pellets, but looks sort of like sawdust. Lyctid powderpost beetles attack only wood products manufactured from hardwoods , e.g., oak, ash, walnut and hickory. Powderpost beetles undergo complete metamorphosis consisting of four lifecycle stages: egg, larva, pupa, and adult. Powderpost beetles are a group of seventy species of woodboring beetles classified in the insect subfamily Lyctinae. Powderpost Beetle, Lyctus spp. Adults – reddish brown, 3/32" - 7/32" long. Infestations in home… Powderpost Beetles . Wood should be maintained below 20% moisture content to reduce its suitability to powderpost beetles. Powderpost Beetle Control Treatments and Spray. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. Frass in or around the exit holes further reveals an active infestation with the presence of adult powderpost beetles. Powderpost beetles can be found in dead as well as dried and cured lumber. Adult powderpost beetles do not eat wood, but their larvae consume the sapwood – the soft outer layer of wood – of maple, ash, oak, and pine. There are two main groups of wood-boring beetles: the old house borer which primarily feeds on softwood timber, primarily pine, and a variety of powderpost beetles, which prefer hardwoods. CARPENTER ANT DAMAGE [top] Frass from carpenter ant activity at corner of crawl space. If exit holes continue to appear in other areas, then additional control is necessary. The surface of powderpost beetle-infested wood will be perforated with small (1/16 – 1/8 th inch) round exit holes where the adult beetles emerged. This list has been written to better inform the public about some of the odd and quirky details surrounding this subfamily of insects. Anobiid frass is also powderlike, but feels gritty. Larval feeding within wood produces a frass as fine as face powder, which will stream from the exit holes at the slightest jar or tremor. The term "powderpost beetle" is often used to describe two families: Anobiidae (deathwatch beetles) and Bostrichidae (false powderpost beetles). And yet, customers often receive conflicting opinions about whether the insects and/or damage they are seeing is indeed due to powderpost beetles. Powderpost beetles can cause more confusion than any other structure-infesting pest. The frass left by other wood borers usually contains pellets and has a course texture and a tendency to stick together. Anobiid powderpost beetles prefer to lay their eggs in cracks, old beetle exit holes, or under wood splinters. Arrange an Inspection ABIS building and pest inspections are conducted to the highest standard by building inspectors with a minimum of 10 years experience together with the highest professional qualifications in their field. True powderpost beetle frass is light and powdery, whereas the frass produced by other beetles is grainy. True powderpost beetle frass is light and powdery, whereas the frass produced by other beetles is grainy. 4. Infestations limited to a single object or a small area can be eliminated by removing the infested wood. Depending on the species of beetle, the frass can either be extremely fine — like flour or baby powder — or slightly gritty like cornmeal. Here are some characteristics of each family: Anobiid. Borer tunnels may occur either in dry or rotting wood or under bark, in the comparatively soft, nutritious bast tissue, either dead or living. These beetles are also known as “cask borers” due to their tendency to go for oak soaked in wine, such as that found in wine barrels. If re-treatment is required, we'll provide immediate services at no extra cost. Powderpost beetles can also compromise the structural integrity of wood. Frass in or around the exit holes further reveals an active infestation with the presence of adult powderpost beetles. The name "powderpost" refers to the type of damage caused by the beetles. If you actually see false powder post beetles in your home, or telltale piles of powdery sawdust, or “frass,” around tiny holes in your home’s wood, you might have a false powder post beetle infestation. ABIS has been in business over 25 years conducting both building and timber pest inspections. Surface treatment with insecticides that have residual effects will help to control reinfestation as it kills the adult beetles as they emerge from the wood. Phil Pellitteri, UW Insect Diagnostic Lab Revised: 4/27/2004 Item number: XHT1053. The adult beetle is 2.5 … The pests prefer wood with high moisture content, as lower moisture levels make the environment uninhabitable for larvae. Damage occurs to many wood products such as rafters, joists, flooring, moulding, panelling, crating, furniture, antiques, tool handles, gun stocks, fishing poles and baskets. Menu; Locations ; Search; Contact; Bill pay and login; Contact. Western Exterminator gives you information so you can identify the false powderpost beetle. Lyctidae: AKA powderpost beetles Named for the powder-like frass they leave behind. Life cycle. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. The moisture content of the wood is a very important factor in managing powderpost beetles. Powderpost beetle (Acantholyctus cornifrons)Photo: Pest and Diseases Image Library, Bugwood.org. The little dark beetles are rarely seen but they are attracted to windows and lights. Larvae are white, C-shaped grubs that are wider at the front end than the back. The adult lyctid powderpost beetle is a small (3/32 to 1/4 inch-long), cylindrical, brown beetle that attacks hardwood. 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