Since the polyphagous shot hole borer was first detected in East Fremantle in early August 2021, it has led to the removal of over 3,800 trees across the Perth metropolitan area.

In response to this invasive pest, which has caused significant tree loss, over $150 million has been allocated for eradication efforts, making it one of the largest biosecurity operations in Western Australia's history.

These eradication efforts are bolstered by substantial funding and resources from both state and federal governments.

Nearly two-thirds of this funding is earmarked for a new $97.3 million Biosecurity Response Centre in Canning Vale, aimed at managing pest threats.

Premier Roger Cook has highlighted the significant risk posed by the pest to Western Australia's fauna, particularly in vulnerable areas such as Kings Park.

A quarantine area has been established across the entire Perth metropolitan region, divided into two zones to contain the spread of the pest.

This quarantine zone was expanded in September 2021 to include 30 local government areas, prohibiting the movement of untreated wood or plant material.

The shot hole borer affects various tree species, including Maple and Moreton Bay Fig trees, and has been identified in areas such as Gosnells, Armadale, Kalamunda, and Ellenbrook.

The pest kills trees by boring holes and introducing a fungus that disrupts nutrient transfer, ultimately leading to their death.

As part of ongoing efforts, the Botanic Gardens and Parks Authority has announced the permanent closure of the Lovers Walk trail in Kings Park due to necessary tree removals.

While the Kokoda Steps will remain open, access is limited to the top as Mounts Bay Road is closed for the removal of 12 heavily infested trees.

Tree removals along the Mount Eliza escarpment will take place over three weeks, impacting its stability and leading to further trail closures.