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Spurge laurel flowers

Spurge Laurel: Toxic, Stubborn, and Trying to Take Over Oregon’s Native Forests

Spurge laurel is a hardy evergreen shrub that threatens threatens some of the Willamette Valley’s most endangered habitats.

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Milk thistle flower.

Milk Thistle: A Prickly Problem in the Tualatin Watershed

Milk thistle negatively impacts crop fields and pastures. It crowds out crops and decrease farmer’s harvests, and is also toxic to livestock.

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Knotweed leaves and flowers.

2020 Knotweed Season Recap

Controlling woody knotweed in the Tualatin River watershed is no easy task. In 2020, nearly 2 acres were treated within the watershed.

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Hawk with wings spread.

Nature vs. Nature: Biological Controls in Conservation

Those of us who grew up watching Animal Planet are familiar with scenes of ferocious hunting and escape – a jarring portrayal of nature’s intense […]

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Image comparing Douglas spirea with pink flowers and purple loosestrife with purple flowers.

Plant This, Not That: Native Alternatives to Pesky Ornamentals

Attractive native plant alternatives don’t harm ecosystems and increase habitat for native birds, wildlife, and pollinators.

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Puncturevine flowers and burrs

Keep Your Eyes Sharp for Puncturevine!

Puncturevine is an annual groundcover with has spiny seed heads that can puncture bicycle tires, inflatable rafts, and shoes. It is becoming a troublesome pest in our region.

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