A new polyphagous shot-hole borer quarantine zone reveals the proliferation of the destructive beetle in Perth’s hills as the state abandons its hopes of eradication in favour of a “management approach”.

The government has binned its old A and B quarantine zones, in place for the past two years, which had suggested the beetle could be contained to the Perth metro area.

A “management zone” is now in place covering a region including horticultural areas of the Perth Hills.

Meanwhile, a “containment zone” has similar boundaries to the old B zone, which spans north to Two Rocks, to Mandurah in the south, and out to Mundaring in the east.

The new zones were uploaded to the Department of Primary Industries and Regional Development with little fanfare on Thursday.

The National Management Gro

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