14010: Walloping a WONS at Windimurra

    The aim of this project is to eradicate the discrete, isolated Parkinsonia aculeata infestation that is present on Windimurra and Challa Stations by 2018.  This will be achieved through mapping the 300ha infestation, spraying all individuals, on-going monitoring of regrowth, and undertaking follow-up treatment.

    P. aculeata is a Weed of National Significance (WONS) and declared under the BAM Act 2007- category C3 management. It is regarded as one of the worst weeds in Australia because of its invasiveness, potential for spread, and the negative economic and environmental impacts.

    Economic costs to landholders stem from an increased difficulty in mustering stock, a reduction in stock access to watering points and a decrease in primary production of grasses. Additionally, infestations provide refuges for feral animals, especially pigs. Wetlands are particularly vulnerable because P. aculeata can dam watercourses, cause erosion, lower water tables and take over vast tracts of floodplain. Threatened areas include national parks, pastoral land and other regions of high aesthetic, indigenous and tourist value.

    The Windimurra P. aculeata infestation is an isolated infestation in the Shire of Mt Magnet and is therefore eradicable, given there is no likelihood of reinfestation once all seed producing plants and the seed bank are removed.

    The project plan is to apply basal bark application of Access 'Thinline' herbicide to all plants and respray seed set annually until there is no further regrowth. 

    Investment: $ 46 930
    In-kind contribution: $ 93 500
    Delivery organisation: Meekatharra Rangelands Biosecurity Association Inc
    Project duration: May 2015 - October 2015
    Location: Windimurra and Challa Stations via MOUNT MAGNET WA 6638; Shire of Mount Magnet

    Project partners

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