Wollemia nobilis (Wollemi Pine) - Biosecurity New Zealand

plants and rootless cuttings imported from Australia is non-negligible and it is considered a
hazard.
The likelihood that new Botryosphaeria species would be associated with Wollemia nobilis
plant in vitro is considered negligible, and as such on this pathway Botryosphaeria species
are not considered a hazard.
11.2.9 Assessment of Uncertainty
The subject of this assessment is a group of fungi that could potentially have a very wide
variety of biological and epidemiological characteristics. To accommodate as far as possible
these significant uncertainties the assessment has been undertaken at a relatively generic
level, focusing on general attributes of the representative fungal species included in the
assessment. Given the uncertainties around what are considered species complexes of the
more widely distributed Botryosphaeria species, the potential hazards should be considered
for all representatives of the Botryosphaeria including those otherwise considered established
in New Zealand.
To ensure that the risk management measures resulting from this assessment remain
appropriate to the risk posed by the pathway, organism associations recorded with the
commodity in the place of origin and during import into New Zealand or other countries
should be monitored.
11.3 Risk Management
11.3.1 Risk Evaluation
The risk estimate for Botryosphaeria species associated with Wollemia nobilis whole plants
and root-less cuttings imported from Australia is considered non-negligible. Phytosanitary
measures may need to be employed to effectively manage the risks to reduce them to an
acceptable level.
The risk estimate for Botryosphaeria species associated with Wollemia nobilis plants in vitro
imported from Australia is negligible and as such phytosanitary measures will not be
required.
11.3.2 Option Evaluation
11.3.2.1 Risk Management Objective
To ensure any Botryosphaeria species associated with Wollemia nobilis nursery stock in
Australia are neither:
o transplanted into the New Zealand environment with Wollemia nobilis nursery stock
imported from Australia; or
o transmitted to a host plant in the New Zealand environment from Wollemia nobilis
nursery stock imported from Australia.
Import Risk Analysis: Wollemia nobilis (Wollemi Pine) Araucariaceae Nursery Stock from Australia 14 March 2008 Page 109 of 193