The majority of building timbers are softwoods and these are usually immune to attack. Larvae emerge from the eggs in about 8-12 days and initially tunnel parallel with the grain but later in any direction (Fig. 1 - Lyctus brunneus adult. SL: Susceptibility to lyctines confirmed; (sl) considered susceptible (unconfirmed); NS Not susceptible to lyctine attack. The larvae mature in one to five years, depending on conditions, moving to just below the wood surface before pupating. They are more common in new homes and recently manufactured hardwood items such as windows and door frames, panelling, flooring, plywood and furniture. The larvae of Lyctus brunneus bore in the sapwood of seasoned or partly seasoned hardwood timbers. The young larva, which occupies barely half the length of the egg, does not hatch out at once, but proceeds to eat the residual … Successful larval development takes place only in wood with a moisture content between 8 and 30%. In severe infestations of Anobium Borer attack of Baltic Pine timber flooring, the timbers may be rendered totally useless and require replacement of the flooring timbers with another type of timber that is not susceptible to Anobium borer attack. The furniture beetle only infests dry, seasoned sapwood of hardwood and conifer trees. Lyctus brunneus (Stephens) is one of the most destructive and worldwide invasive pests of seasoned woods for wooden products. Round flight holes of approx. Ministry of Technology, Forest Products Research. Hosts This beetle will also attack softwoods, but only those with some kind of bark present. The two wood-boring weevils are recognized with increasing frequency in the London district and in other parts of the country, almost always in timber which is damp or infected with fungus-usually wet rot. Associated Business Programmes Ltd, London. 0000016463 00000 n Fig. Wood boring insects refer to a selection of arthropods which cause damage to wooden structures. Forest and Timber Insects in New Zealand No. The life cycle takes up to 10 years, depending on environmental conditions and the nutrient content of the wood, which decreases with age. 0000009830 00000 n The Asian longhorn beetle is a pest of hardwood trees in roadside plantings and plantations in China and has now become a pest in Europe and the US. The line shows natural length. Please check your email address / username and password and try again. Economic importance Surfaces of tunnels are coloured black/blue-black. (1) in severe cases the removal and replacement of all damaged and infested timber with highly resistant or chemically treated timbers or particleboard, which can be a very expensive undertaking, or Scion is the leading provider of forest-related knowledge in New Zealand Rosel, A. Common Habitat Areas 0000008481 00000 n function gtag(){dataLayer.push(arguments);} The furniture beetle only infests dry, seasoned sapwood of hardwood and conifer trees. Larvae emerge from the eggs in about 8-12 days and initially tunnel parallel with the grain but later in any direction (Fig. Bletchly, J.D. 1978: Lyctus brunneus (Stephens) (Coleoptera: Lyctidae). 2). Stocks of susceptible imported timber should be examined annually and any infested pieces found either sterilised or burnt. %PDF-1.7 %���� The larvae of this group pack their tunnels with a course, gritty frass, which distinguishes. It is essential that such furniture be fumigated in a Government approved fumigation chamber using methyl bromide gas. (actual size). Tunnels, which are initially longitudinal, later extend in all directions and are loosely packed … They are small, dark brown or black beetles, about 1/8 inch in length, and are easily distinguished by their pronounced snouts. xref The method and manner of oviposition in L. brunneus is established and is found to be the same as in L. planicollis, which is that of: depositing its eggs in the tracheae, vessels, or pores, and under the surface of the wood.. 2. Therefore, L.brunneus and other pest Lyctus species are expanding their distribution more broadly with recent increases of the international and domestic transportation of wood and wooden products. The Asian longhorn beetle (Anoplophora glabripennis) and citrus longhorn beetle (Anoplophora chinensis) are native to East Asia but have been introduced to other areas of the world, most significantly Europe and North America. It is the sapwood portion of felled timber (logs) that is susceptible to attack and damage by the Lyctus Borer (also called the Powder Post Beetle). Commercial products containing nematode worms that are parasites are available to control outbreaks. (Scion is the trading name of the New Zealand Forest Research Institute Limited.). A timber’s propensity to infestation by lyctine insects, principally the powderpost beetle Lyctus brunneus. 1967: Insect and marine borer damage to timber and woodwork: recognition, prevention and eradication. The female can enlarge old tunnels or create new ones for egg laying. Rare attacks may occur on certain species of. The main family that attacks trees is the Siricidae, or horntails, named because of a horn like feature on the abdomen of the larvae. Fig. SL: Susceptibility to lyctines confirmed; (sl) considered susceptible (unconfirmed); NS Not susceptible to lyctine attack. Round tunnels mainly in the bark if present. The sapwood of all other (lyctine-susceptible) hardwoods is rendered non-susceptible to attack by lyctine borers when immunised by preservative treatment. Beilschmiedia tawa (tawa) and Knightia excelsa (rewarewa) are the main commercial native timbers that are susceptible; Nothofagus (beech) is occasionally affected. The cost of such fumigation is fairly inexpensive provided a fumigation chamber is near you, as the delivery costs are separate and usually paid for and organised by the furniture owner. Insect: Lyctus brunneus (Stephens) (Coleoptera: Lyctidae) 0000022762 00000 n They also establish satellite nests in drier wood that can contain workers, pupae and mature larvae. Of the overseas timbers commonly used in New Zealand, Quercus (oak), Fraxinus (ash), Ulmus (elm), and Eucalyptus (eucalypt) are susceptible. 0000022693 00000 n 4 - Workings of L. brunneus larvae filled with fine talcum powder-like bore dust. oC��V� ~?�5iq��ߊsk���C��[�(%k�"�Ɖ���v���, ]nl����ǥ�t�wW*HW �1�*��u�� K�Τ����և��Z訳G2���:��U. There are two species of Weevil which are found in structural timbers-Pentarthrum huttoni and Euophryum confine; they have no popular names. An active infection is shown by the presence of. Boring Insects endstream endobj 29 0 obj <>>>/Metadata 26 0 R/OpenAction 30 0 R/Outlines 21 0 R/PageLayout/SinglePage/Pages 25 0 R/Type/Catalog/ViewerPreferences<>>> endobj 30 0 obj <> endobj 31 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Shading<>/XObject<>>>/Rotate 0/Tabs/W/Thumb 22 0 R/Trans<>/TrimBox[0.0 0.0 595.276 841.89]/Type/Page>> endobj 32 0 obj [/ICCBased 60 0 R] endobj 33 0 obj <> endobj 34 0 obj <>stream Generally the majority of the damage to timbers is caused during the larvae (grub) stage of the borer lifecycle. Therefore, any damage from this borer to such timbers will be structurally insignificant. timbers are softwoods and these are usually immune to attack. �P��#�"(�6�Ex!l!�H�[>�k�\��e0! In Australia under optimum conditions the life cycle can be as short as 54-63 days in the wood of Sterculia acerfolia (flame tree) and four generations per year can consistently be produced from Eucalyptus obliqua (Rosel, 1962). //]]> The LAMP assay was faster and more sensitive for detecting the presence of DNA derived from L.brunneus in their frass than the nested PCR assay.

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