Responding to Polyphagus shot-hole borer (PSHB) detections

Updated on 1 March 2022

The Department of  Primary Industries and Regional Development (DPIRD) is responding to increasing detections of a PSHB, following its first ever in-Australia detection in East Fremantle in August 2021.

Establishment of this pest in WA would have significant impact on amenity trees, native vegetation and industry. Considering the significant efforts by Local Government into increasing urban tree canopy cover, it is important to prevent spread of this new pest.

To manage the ongoining surveillance program by DPIRD and to stop the spread of this pest, a Quarantine Area Notice (QNA) was put in place on 24 September 2021 for parts of the suburbs of Fremantle, East Fremantle, North Fremantle, Palmyra and Bicton. This QAN was replaced with a new QAN that came into effect on 16 November 2021 and now covers 17 Local Government Areas.  A map of the Quarantine Area, list of tree hosts and more advice to residents is available on the department website 

or view the following self-paced PSHB information module: Polyphagous shot-hole borer (PSHB) (

WALGA facilitated two information sessions for Local Government. Copies of presentation recordings can be requested by emailing to and copies DPIRD presentations can be accessed via the following links:

PSHB Information Session 5 November 2021
PSHB Information Session 12 November 2021

On 23 December, DPIRD provided an update to key stakeholders:

PSHB Industry Update (23 December 2021)
PSHB Stakeholder update presentation (23 December 2021)

To support Local Government with communications to residents, DPIRD have provided a set of materials. These materials can be downloaded via links provided below: 

Iconographic signage:  Media Release: PSHB QA Expanded 16 November 2021

Quarantine Area Notice
Image: PSHB QA Boundary Extension November 2021

Exemption Notice
List of approved waste facilities outside the Quarantine Area
Host list 

Information sheets:
PSHB DL Infographic PRINT
PSHB Infographic WEB
PSHB Fact Sheet November 2021
Frequently Asked Questions
PSHB - how to handle infested plant material
Do you have a Box elder tree?

Photos - All images Credit Pia Scanlon, DPIRD 2021:
Inspection of infested box elder branch
PSHB detection box elder
DPB_0034 Euwallacea fornicatus holes and frass
DPIRD Biosecurity Officer, entomologist and plant pathologist
DPB_0120 PSHB detection box elder
DPB_0169 PSHB detection box elder
DPB_0181 PSHB detection box elder and ruler
DPB_0183 PSHB detection fallen limb box elder
DSC_9055 Euwallacea fornicatus hole size
DSC_9149 Euwallacea fornicatus
DSC_9164 Euwallacea fornicatus
DSC_9168 Euwallacea fornicatus
DSC_9297 PSHB infested maple tree fungal staining
DSC_9303 PSHB infested maple tree beetle size
DSC_9529 PSHB infested maple tree
DSC_9531 PSHB infested maple tree
DSC_9548 PSHB infested maple tree
DSC_9556 PSHB infested maple tree
DSC_9561 PSHB infested maple tree
Euwallacea fornicatus dorsal female
Euwallacea fornicatus lateral female

If you experience any difficulties with downloading the images or the information provided here, please email to