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Sustained control
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The sustained control programme aims to provide for ongoing control of the pest to reduce its impacts on values and spread to other properties.
Below is an example of the pest infestation curve which is used around New Zealand to help us figure out the best management option for pests. Where a pest sits on the curve tells us the most cost-effective way to control or eradicate it.
Broom
Broom is a woody shrub up to 3 m tall with small, hairy leaves in groups of three and bright yellow flowers (spring–summer). It spreads similarly to gorse, with explosive seed pods and durable seeds lasting 40–80 years.
Gorse
Gorse is a sharp, spiny shrub up to 4 m tall with bright yellow flowers from May to November. It spreads by explosive pods, water, and contaminated equipment. Gorse thrives across many habitats in Otago and forms dense, invasive patches.
Nodding thistle (pest)
Nodding thistle is a tall, spiny plant with large crimson flowers that droop when mature. Stock avoid it, and its dense rosettes reduce pasture for grazing. One plant can produce up to 10,000 seeds that stay viable for 20 years | Sustained control
Ragwort
Ragwort is a toxic yellow-flowering weed that harms livestock and reduces pasture | Sustained control
Rabbits
Feral rabbits in Otago are fast-breeding, burrowing pests that damage native vegetation, crops, and soil structure | Sustained control
Wild Russell lupin
Wild Russell lupin forms dense clumps along braided rivers, altering water flow, smothering bird nesting sites, and increasing flood risks | Sustained control
