Structural sawn timber: resource enhancement

A structural model with interventions for new Zealand sawn timber production

Timber production in New Zealand was privatized in 1987. We examine the effects of this change on the level of New Zealand sawn timber production, and changes in the seasonal pattern, using a state-space model with intervention variables. We describe the formulation and estimation of the state-space model, and show how it can be used to examine both the structural changes around the time of pri...

Ethanedinitrile: potential methyl bromide alternative to control Arhopalus ferus (Mulsant) in New Zealand sawn timber exports

The efficacy of ethanedinitrile (EDN, syn. cyanogen, EDN Fumigas®) for the control of burnt pine longhorn beetle (Arhopalus ferus (Mulsant)) adults was tested using a range of ethanedinitrile concentrations. The LD 99 for adults after a 3 h exposure at 15°C was 12.6 g/m. The results demonstrate that ethanedinitrile is a potential phytosanitary alternative to methyl bromide for disinfesting burn...

Detection of Possible Phytophthora pinifolia Infection in Pinus radiata Green Sawn Timber Produced in Chile

A new needle blight disease was observed on Pinus radiata in Chile during 2004. The disease, known in Chile as Daño Foliar del Pino (DFP), stretches southward from the Arauco to Valdivia Provinces, and was present over an area of about 60 000 ha in 2006, with different levels of intensity. The disease is typified by needle infections and exudation of resin at the bases of the needle brachyblast...

Species independent strength grading of structural timber

Combined Visual and Machine Strength Grading

The aim of this study was to show the possibility of the classification of structural timber (European spruce) into strength class C35 according to EN 338 by using combined visual and machine strength grading techniques. Three different visual machine strength grading combinations are devised for allocating sawn timber into strength class C35. They are composed on the one hand of the visual gra...