Specialty Timbers New ZealandThe decay resistance of six Eucalyptus species after four years exposure
By Jackie van der Waals, Ian Simpson and Tripti Singh, November 2020.
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Executive summary
Durability stakes and stakelets were prepared from six different durable Eucalyptus species, (Eucalyptus bosistoana, Eucalyptus quadrangulata, Eucalyptus pilularis, Eucalyptus sphaerocarpa, Eucalyptus globoidea, Eucalyptus muelleriana). For each species, timber had been selected from four different trees with samples taken from both inner and outer heartwoods.
Control stake and stakelet samples from Pinus radiata sapwood, Fagus sylvatica (European beech), and H3.2 and H4 CCA treated Pinus radiata sapwood were also included in the test.
The stakes were exposed outdoor at Scion’s Whakarewarewa Graveyard, and the stakelets were installed in the Scion’s Accelerated Decay House (with a temperature of 27°C and a relative humidity of 85%).
Stakes and stakelets were prepared from the six different Eucalyptus species which had been selected to have high natural durability.
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