Photo credit: Pat Nebel Studio 16
- Lake Management
- Lake District
- Fact Sheet
Lake Management
NSTLRA IS AWARDED THE AIS CONTROL AND PREVENTION PROJECT GRANT FROM WDNR FOR 2008-2011. More in depth information will be forthcoming soon.Aquatic Invasive Species
Eurasian watermilfoil
In 1998 the State of Washington tested application of 2,4-D on a lake that just started to show Eurasian watermilfoil (EW). Loon Lake was 1100 acres and about 60 acres had early signs of EW. They applied 2.4-D at the rate of 112lbs/acre, “Results showed a significant decrease in Eurasian watermilfoil biomass and frequency in treated areas 6 weeks after treatment, which continued through the one year posttreatment samples. No other plant species were significantly affected by the herbicide application.” However, the study results were closely related to the fact that Loon Lake had an “Early Infestation”, having been discovered only two years before.
The rebound in Eurasian watermilfoil biomass experienced in other treatment studies, and evident in this study after one year of treatment, indicate that additional measures will need to be taken to maintain reduced Eurasian watermilfoil biomass in Loon Lake.
Once milfoil is discovered in a lake, it generally requires continual maintenance to keep it at low levels. Even if EW appears to have been eradicated it often is reintroduced by boaters or may germinate from seeds. As long as a lake group continues surveying on a yearly basis, new introductions can be identified quickly and targeted for removal before milfoil can re-establish in the lake. Not identifying Eurasian watermilfoil growth early and then failing to treat it quickly and regularly significantly reduces the potential to keep it under control. In lakes where a lake group has continued surface inspections and regular treatment programs, EW remains at extremely low levels, without impacts to habitat or recreational activities.
Map of proposed chemical treatment for spring of 2008. More information in Newsletter Vol 13 No 1 on this website.
Lake District
Objectives of the North South Twin Lakes District Lake Management Plan
• Insure that the lakes' environmental issues are addressed fairly and democratically
• Provide a forum for all owners to be part of the solution
• Evaluate feasible aquatic plant management alternatives
• Manage AIS safely and effectively with methods currently available
• Protect, nurture, and improve fish and wildlife habitat
• Support all legal recreational uses of the lakes
• Preserve native aquatic plants
• Promote lake management education and raise awareness
• Communicate Plans to all owners
• Secure financial resources to support the Lake Management Plan
Download the Lake Association FACT SHEET here
Download the Lake District FACT sheet here
