• Students Test Their Skills During 2019 North American Weed Science Contest
  

  WESTMINSTER, Colorado – November 4, 2019 – More than 240 students from 29 universities tested their mettle during the recent 2019 North American Weed Science Contest – an event endorsed by the Weed Science Society of America and its regional … more »

• Weed Bingo is For Sale in the WSSA Bookstore!
  

  WEED BINGO is a fun game that blends a bit of science with interesting and unusual facts about some of the world’s most common and troublesome weeds. Each of the 42 weed more »

• Weed Science Societies Announce Plans for Upcoming Annual Meetings
  

  WESTMINSTER, Colorado – October 21, 2019 – Today the Weed Science Society of America (WSSA) and five affiliated scientific societies announced plans for annual meetings that will explore new innovations and best practices in weed control. Presenters and attenders at … more »

• Will Gene Sequencing Lead to New Weed Control Strategies?
  

  Palmer amaranth and waterhemp are two troublesome amaranthus species weeds that are resistant to multiple herbicides. They also have unique reproductive features. more »

• A Perfect Storm: Are Environmental Factors Fueling Herbicide Resistance?
  

  Sobering global survey data shows weeds have evolved resistance to 167 herbicides spanning 23 of 26 known sites of action. Now scientists writing in the journal Invasive Plant Science and Management say climate change and elevated levels of carbon dioxide (CO2) may be contributing to the development of herbicide resistance. more »

• Can Native Plants Make a Comeback on Their Own
  

  As invasive shrubs become more prevalent in U.S. forests, they are creating dense understories that outcompete native plants. Land managers with limited resources find themselves facing a tough decision. Does it make sense to remove the invaders if a comprehensive restoration program isn’t possible? more »

• Thailand Bans Use of Paraquat, Farm Chemicals
  

  The ban, proposed by the Agriculture Ministry, had met with strong opposition from some farmers groups and academics, who argued that the chemicals were not unacceptably dangerous and banning their use would drive up farmers’ costs significantly. more »

• Using the Broader Approach Against Rising Weed Resistance
  

  The battle against herbicide-resistant Palmer amaranth continues unabated in North Carolina. Charlie Cahoon says growers must integrate a broader system to better control troublesome weeds. more »

• A Layby Application Made a 1,400-Pigweed Difference per Acre
  

  That layby application you made, or didn’t make, matters when it comes to continued pigweed control in cotton, and it can help preserve a valuable tool. 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.