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 […]
We are very pleased to welcome a new addition to the WeedWise team! The WeedWise program is pleased to announce our newest staff member Makayla Hartness! Makayla joins our team as a new WeedWise Technician. Makayla joins the WeedWise Program’s efforts to manage invasive weeds across Clackamas County, with a focus on protecting natural areas […]
Tansy ragwort (Senecio jacobaea) is an invasive weed with a long and deadly history in the Pacific Northwest. In Oregon, it is designated as a Class B invasive weed. It is believed to have been introduced here in the early 1900s through ballast water from a ship. This plant is native to Europe and Asia […]
It is National Pollinator Week! June 17-23, 2024 has been designated as National Pollinator Week! 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 brings the many bees, flies, beetles, […]
Policeman’s helmet (Impatiens glandulifera) is an invasive weed that grows in ditches, wetlands, and along waterways. Native to India, this fast-growing annual was introduced as an ornamental plant due to its impressive growth and the showy purple, pink, or white blooms. Since introduction, it has escaped cultivation to become the dominant riparian vegetation in many […]
May 19-25 is the week that we celebrate Oregon Invasive Weed Awareness Week! This is the one week of the year to reflect on the invasive weeds impacting Oregon and for us to begin taking steps to combat these aggressive and harmful invaders. This year we want you to join others across Oregon in learning […]
Orange hawkweed (Hieracium aurantiacum) is a relatively new invasive weed in Clackamas County and we are working to keep it from becoming a common problem for landowners! A member of the sunflower family, orange hawkweed is native to central and southern Europe and grows in open areas like roadsides, meadows, pastures, hayfields, and disturbed sites. […]
We are very pleased to welcome a new addition to the WeedWise team! The WeedWise program is pleased to announce our newest staff member Hayden Jorde! Hayden joins our team as a newly developed WeedWise Technician position. Hayden will support the WeedWise Program’s efforts managing invasive weeds across Clackamas County but will focus much of […]
Earth Day is April 22, 2024! Earth Day provides a great opportunity to reflect on the planet we all love and share. One of the biggest threats to our natural systems is from invasive species. The introduction and unchecked spread of invasive weeds disrupt food webs and cause a collapse of our natural systems. So […]
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 […]
