• Dave Belles 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Dave Belles observes the growth of tobacco plants in the Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Spotted Knapweed 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Spotted Knapweed grows in the Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Dale Shaner 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Dale Shaner pulls a sample of plants out of a spray chamber at the Colorado State University Weed Laboratory, October 8, 2002.
      • Weed Laboratory Greenhouse 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        The Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Phil Westra and Doug Barlin 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Phil Westra and Doug Barlin measure plants at the Colorado State University Weed Laboratory, October 8, 2002.
      • Dale Shaner and Phil Westra 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Dale Shaner and Phil Westra apply herbicides in a spray chamber at the Colorado State University Weed Laboratory, October 8, 2002.
      • Phil Westra 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Phil Westra looks at weed growth in the Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Doug Barlin 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Doug Barlin measure plants at the Colorado State University Weed Laboratory, October 8, 2002.
      • Phil Westra 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Phil Westra looks at weed growth in the Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Spotted Knapweed 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Spotted Knapweed grows in the Colorado State University Weed Laboratory Greenhouse, October 8, 2002.
      • Phil Westra 

        Author(s):Cotton, William A.
        Date:2002-10-02
        Format:born digital; digital photographs
        Phil Westra trims and measures plants at the Colorado State University Weed Laboratory, October 8, 2002.