Farm Forestry New ZealandDecay rate of Cypress stakes after one year’s exposure at the Whakarewarewa test site
By Jackie van der Waals, Ian Simpson, and Tripti Singh, July 2022.
Download SWP-T147 (pdf)
Executive summary
Stakes of Cupressus x ovensii grown in Rotoehu and Riverhead, and Cupressus x leylandii (Leyland cypress) were installed in the Whakarewarewa outdoor test area in April 2021. Untreated radiata pine and CCA H4 treated radiata pine stakes were also included for comparative purposes.
After one year in-ground exposure, the stake Indexes of Condition (I o C) for all the Cypress species tested were very similar (between 8.5 – 8.9). In comparison, CCA H4 treated radiata pine stakes have an I o C of 10.0 and the I o C of the untreated radiata pine stakes was 5.9.
This trial will continue and will be assessed annually, with the next assessment due in April 2023.
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