Parsons, J.K., K.S. Hamel, J.D. Madsen, and K.D. Getsinger, 2001. The Use of 2,4-D for Selective Control of an Early Infestation of Eurasian Watermilfoil in Loon Lake, Washington, Minnesota State University.

Reprinted with permission from Journal of Aquatic Plant Management (2001) 39: 117-125

A patchy distribution of Eurasian watermilfoil (Myriophyllum spicatum L.) in Loon Lake was treated with the herbicide 2,4-D during July 1998.  Aquatic plant biomass and frequency data were collected before treatment, and six weeks and one year after treatment.  Aqueous concentrations of 2,4-D increased to 1 to 2 mg/l within one day of treatment, and were below detection limits by one week after treatment.  Macrophyte data were analyzed to assess the herbicides impacts on Eurasian watermilfoil as well as the rest of the aquatic plant community.  Results showed a significant decrease in Eurasian watermilfoil biomass and frequency in treated areas 6 weeks after treatment, which continued through the one year post-treatment samples.  No other plant species were significantly affected by the herbicide application.

Entire Paper
Contact: John Madsen, Biological Sciences Department, Minnesota State University, S-242 Traften Science Center, Mankato, MN 56001, USA
Key Words: Eurasian_watermilfoil, Chemical_control, Aquatic_plant_management
Product Type: Research, Control
User Type: Resource Management