First report of Xylosandrus crassiusculus in New Zealand
In February 2019, Xylosandrus crassiusculus (Coleoptera, Scolytidae - EPPO Alert List) was detected for the first time in New Zealand. Several adult specimens were collected from an oak (Quercus sp.) tree in Auckland (North Island) during routine surveillance carried out by the NPPO. As of March 2019, the pest was detected in 5 sites in the Auckland area. Although it is unclear how X. crassiusculus arrived in New Zealand, observations suggest that it may have been present in the country for at least 2 years. At one site, the destruction of infested oak trees has been ordered by the NPPO. Surveys are being carried out (visual inspections and use of traps) to delimit the extent of the infestation. The general public has also been invited to report any sightings to the authorities.
The situation of Xylosandrus crassiusculus in New Zealand can be described as follows: Present, only in some areas (first found in 2019 near Auckland), under official control.
- Biosecurity New Zealand. Fact Sheet. Granulate ambrosia beetle Xylosandrus crassiusculus. https://www.mpi.govt.nz/dmsdocument/33451-granulate-ambrosia-beetle
- Biosecurity New Zealand. Media releases (2019-03-25) Public asked to help with beetle surveillance. https://www.mpi.govt.nz/news-and-resources/media-releases/public-asked-to-help-with-beetle-surveillance/