The Integrated Aquatic Vegetation Management Plan developed by Cascade Water Alliance to combat Eurasian Milfoil in Lake Tapps has as it’s first step treatment of large infestations of this noxious weed with Sonar Aquatic Herbicide. Two formulas of Sonar are planned for use this year. Sonar Q and Sonar PR both have the same chemical makeup. Both are granular forms of this herbicide, the difference is the release rates from the pellet. The mode of action of Sonar is such that Eurasian Milfoil plants have to be exposed to this product for an extened period of time. Three applications at approximately two week intervals with this controlled release formula will accomplish this.
We have had a request through this page to make available information on Sonar. First, Sonar is approved for this use by both the US Environmental Protection Agency, and the Washington State Department of Ecology. This application will be made under a permit from Ecology that regulates these uses. Additional information can be obtained at this link from the Washington Department of Health, http://www.doh.wa.gov/ehp/ts/Fluridone.doc and from SePRO at http://sepro.com/documents/Risk_Guide.pdf
What is the short term effects of the treatment? Should I abstain from taking a swim for a day, 2, week???? Should I not let me dogs drink the water for a day, 2, week???????