Author Archive | Sam Leininger

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Tree-of-Heaven Falls Far from the Name

If you start looking around Clackamas County, it won’t take you long to find the invasive tree-of-heaven (Ailanthus altissima).  This state-listed noxious weed is increasingly more common in many of our urban areas where it flourishes.  Tree-of-heaven seems right at home in alleys, roadsides, railways, vacant lots, that crack in the sidewalk.  Very large trees […]

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Knotweed

September’s Weed of the Month: Knotweed

September is the Time to Control Japanese Knotweed Japanese knotweed (Fallopia japonica) has been called a “nightmare” and a “botanical bully,” and is one of the 100 worst global invaders. These characterizations give you a pretty good idea of just how unwelcome this invasive weed is in our community. Japanese knotweed is fast-growing and hardy, […]

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Tansy Ragwort Poisons Livestock and Neighborly Relationships!

Tansy ragwort has long tormented rural landowners who graze livestock. Horses and cows are especially susceptible to this poisonous weed. In open fields, grazing animals will generally avoid eating tansy ragwort, but in heavily infested pastures they may have few other options.  Contaminated hay is particularly a problem because it becomes impossible for feeding animals […]

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pollinator header

It is National Pollinator Week!

It is National Pollinator Week! June 21-27, 2021 has been designated as National Pollinator Week in Oregon and across the country!  Join the WeedWise program and other organizations across the country in celebrating our native pollinators. Summer is here and the weeds and wildflowers are blooming all around us. This burst of summer color also […]

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Staff Spotlight: Samuel Leininger, WeedWise Manager

  Get to know the WeedWise program, through our people! The success of the WeedWise program is in great part due to the hard work and dedication of our staff.  If you have ever called the office or stopped by for assistance with your weed problems, you have undoubtedly worked with one of our hard-working […]

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It’s Native Plant Appreciation Week!

Let’s Celebrate! The WeedWise program is in the business of preventing and controlling invasive weeds.  As anyone that spends much time battling invasive weeds can attest, our work can feel a little daunting at times.  We all have those days when we are battling a bothersome patch of invasive weeds and lose sight of the […]

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herbicide

Recently discovered organic herbicide shown to be safe and effective against all invasive weeds!  

Invasive weeds can be extremely damaging and pose a real threat to the social, economic, and ecological health of our communities.  One important tool for controlling large infestations of invasive weeds is herbicides. Industrial herbicides have been used to manage large infestations of invasive weeds since the 1940s, but their use is problematic for some […]

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WeedWise Program