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Medium Density Fibreboard Manufactured from Blends of White Cypress Pine and Non-Durable Wood Species Shows Increased Resistance to Attack by the Subterranean Termite C lacteus

Evans, Philip; Dimitriades, A; Cunningham, Ross; Donnelly, Christine

Description

Medium density fibreboards consisting of blends of the naturally durable wood species white cypress pine (Callitris glaucophylla) and non-durable wood species were manufactured in a commercial plant and subjected to a bioassay using the subterranean termite species, Coptotermes lacteus. A board composed of 30% cypress pine, 30% slash pine (Pinus elliottii) and 40% of the naturally durable hardwood species spotted gum (Corymbia maculata) was also manufactured and bioassayed against C. lacteus....[Show more]

dc.contributor.authorEvans, Philip
dc.contributor.authorDimitriades, A
dc.contributor.authorCunningham, Ross
dc.contributor.authorDonnelly, Christine
dc.date.accessioned2015-12-13T23:17:57Z
dc.date.available2015-12-13T23:17:57Z
dc.identifier.issn0018-3830
dc.identifier.urihttp://hdl.handle.net/1885/89942
dc.description.abstractMedium density fibreboards consisting of blends of the naturally durable wood species white cypress pine (Callitris glaucophylla) and non-durable wood species were manufactured in a commercial plant and subjected to a bioassay using the subterranean termite species, Coptotermes lacteus. A board composed of 30% cypress pine, 30% slash pine (Pinus elliottii) and 40% of the naturally durable hardwood species spotted gum (Corymbia maculata) was also manufactured and bioassayed against C. lacteus. The aims were to determine (i) whether boards containing cypress pine possessed increased resistance to termite attack compared to a control manufactured entirely from non-durable wood species; (ii) the relationship between the cypress pine content of boards and their resistance (if any) to termite attack; (iii) whether the termite resistance of boards containing cypress pine could be further enhanced by the addition of spotted gum fibre. There was an inverse relationship between the cypress pine content of MDF specimens and mass losses of the specimens during the bioassay; the percentage mass losses of specimens containing 11.4, 16.2 and 34.2% cypress pine being 20.3, 13.4 and 8.8%, respectively, compared to 32.8% for the control, which consisted of non-durable slash pine (80%) and hoop pine (Araucaria cunninghamii) (20%) fibre. There was strong evidence that the inverse relationship between the cypress pine content of boards and mass losses during the bioassay was linear, although a statistically significant quadratic (curvilinear) effect was also apparent. The addition of spotted gum fibre to boards did not increase their resistance to termite attack. Cypress pine heartwood contains a variety of extractives that are either toxic or repellent to termites, and the increased termite resistance of MDF containing cypress pine compared to the control is probably due to the insecticidal effect of such chemicals on C. lacteus. The incorporation of cypress pine fibre into MDF shows promise as an alternative to chemical biocides for increasing the resistance of MDF to termites. However, the response of termites to heartwood extractives varies between species, and therefore further experimentation is needed to test the resistance of MDF containing cypress pine fibre to attack by greater range of wood destroying termites under test conditions that more closely simulate field conditions.
dc.publisherWalter de Gruyter
dc.sourceHolzforschung
dc.subjectKeywords: Bioassay; Biocides; Paperboards; Wood preservation; Araucaria cunninghamii; Corymbia maculuta; Mass losses; Natural durability; Softwoods; Araucaria; Biocides; Biological Tests; Callitris; Heart Wood; Paper Boards; Pinus Elliottii; Softboards; Softwoods; Callitris glaucophylla; Coptotermes lacteus; Cypress pine; Medium density fibreboard (MDF); Natural durability; Termite
dc.titleMedium Density Fibreboard Manufactured from Blends of White Cypress Pine and Non-Durable Wood Species Shows Increased Resistance to Attack by the Subterranean Termite C lacteus
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume54
dc.date.issued2000
local.identifier.absfor120203 - Quantity Surveying
local.identifier.ariespublicationMigratedxPub20183
local.type.statusPublished Version
local.contributor.affiliationEvans, Philip, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationDimitriades, A, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationCunningham, Ross, Administrative Division, ANU
local.contributor.affiliationDonnelly, Christine, Administrative Division, ANU
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage585
local.bibliographicCitation.lastpage590
local.identifier.doi10.1515/HF.2000.099
dc.date.updated2015-12-12T08:54:58Z
local.identifier.scopusID2-s2.0-0034578808
CollectionsANU Research Publications

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