• Study Shows the Impact of Preemergent Herbicides on Native Plants
  

  WESTMINSTER, Colorado – January 18, 2022 – Though invasive weeds can devastate native plant communities, a recent study featured in the journal Invasive Plant Science and Management shows that efforts to manage those weeds can also cause harm. In the arid rangelands of the western … more »

• Weed Science Societies Announce Further Details on Upcoming Joint Annual Meeting
  

  WESTMINSTER, Colorado – January 10, 2022 – Today the Weed Science Society of America (WSSA) and the Canadian Weed Science Society (CWSS) announced details for their upcoming joint annual meeting, scheduled for February 21-24 in Vancouver, Canada. Four special symposia … more »

• Years of Effective Weed Control Required to Produce Prized Christmas Trees, WSSA Says
  

  WESTMINSTER, Colorado – December 13, 2021 – Christmas trees are central to many a holiday celebration. But behind the scenes, it takes a multiyear effort to bring even a single tree to market, experts with the Weed Science Society of … more »

• Waterhemp Population Exhibits Resistance to Dicamba
  

  WESTMINSTER, Colorado – December 29, 2021 – Waterhemp is one of the most troublesome agronomic weeds in the midwestern U.S., where it has rapidly evolved resistance to multiple herbicides. One example: An Illinois waterhemp population has exhibited resistance to six … more »

• Study Shows Socioeconomic Factors Can Influence the Spread of Invasive Plants
  

  WESTMINSTER, Colorado – September, 2021 – Predicting the spread of nonnative plants that have the potential to become invasive may seem like an unachievable goal. But research featured in the journal Invasive Plant Science and Management shows important, predictive clues … more »

• Do the Ways We Live and Work Influence the Spread of Invasive Plants?
  

  A recent study shows we may be overlooking important information that can help us predict how and where invasive plants are likely to spread. Researchers writing in the journal Invasive Plant Science and Management say invasion pathways can be closely … more »

• Think Climate Change is bad for corn? Add weeds to the equation
  

  URBANA, Ill. – By the end of the century, scientists expect climate change to reduce corn yield significantly, with some estimating losses up to 28%. But those calculations are missing a key factor that could drag corn yields down even … more »

• Attack of the Superweeds: Herbicides are losing the war — and agriculture might never be the same again.
  

  Click on the link below for the article  https://wssa.net/wp-content/uploads/NYT-Magazine_Attack-of-the-Superweeds_Aug-22-2021.pdf

• Where Do Denver’s Tumbleweeds Come From?
  

  You might expect tumbleweeds on Colorado’s plains, but what are they doing rolling around RiNo and LoDo? more »

The WSSA, a non-profit professional society, promotes research, education, and extension outreach activities related to weeds; provides science-based information to the public and policy makers; and fosters awareness of weeds and their impacts on managed and natural ecosystems. Learn more about the WSSA.