Forest health diagnostics

gwa-beetle Scion’s diagnostics team supports the early detection of new pests and pathogens on woody plants in New Zealand. We accept samples from all tree species, including those from production forestry, native forests and amenity plantings, as well as from woody shrubs.

Our diagnostics team includes pathologists, entomologists, botanists and molecular scientists. We focus on identification and diagnosis, rather than treatment. A good sample is helpful for a successful identification. The type of sample needed will depend on the type of pest or pathogen present. For pests, dead material may be suitable. For pathogens, it is important that samples include the margin between live and dead plant tissues. Please refer to our sampling instructions, and if you have any questions, please email or call 07 343 5513.


Scion can help cover the diagnostic fee for members of the public. Please contact or call 07 343 5513 to see how you can access this service. The Ministry for Primary Industries’ Plant Health and Environment Laboratory (PHEL) also offers a similar service. Please contact PHEL at 0800 00 83 33 or email


Samples (see sampling instructions) should be sent along with a sample submission form to:


Forest Health Reference Laboratory
c/o Stores 
49 Sala Street
Rotorua 3010

Or hand-deliver:

Scion Reception
Titokorangi Drive (formerly Long Mile Road) 

During business hours 8:00 am - 5:00 pm, Monday to Friday.

If you think you have found a new to New Zealand insect or pathogen, ring the Biosecurity New Zealand Pest and Disease hotline - 0800 80 99 66.