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Invasive pest detected in City of Wanneroo

Published Friday, 27th June 2025

The first case of Polyphagous shot-hole borer (PSHB) has been detected in the City of Wanneroo.

Polyphagous shot-hole borer.

The City is working with the Department of Primary Industries and Regional Development (DPIRD) to enact a Tree Management Plan for the affected tree, which is located in Wanneroo, and will continue to monitor the area closely in the coming weeks.

First detected in Perth in 2021, the PSHB is a tiny, wood-boring beetle native to Southeast Asia. About the size of a sesame seed, PSHB excavates tunnels in trees where they cultivate fungus as a food source, resulting in tree dieback and death.

Mayor Linda Aitken said the City remained committed to prioritising effective and timely management of the PSHB.

“The PSHB could significantly impact the City of Wanneroo’s urban canopy if it were to become established here,” she said. 

“It’s important that we all check our trees for signs and report any suspected sightings, to allow DPIRD to investigate.

“Protecting and increasing our canopy cover and vegetation is a key goal for the City, as set out in our Urban Forest Strategy.”

The City will continue to follow DPIRD’s lead in managing the spread of the PSHB and encourages the community to use the MyPestGuide app to report suspected sightings.

To learn more about the PSHB and how you can help prevent its spread, visit our PSHB webpage.

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