Survival and Contaminant Analysis of Juvenile Spring Chinook Salmon during Herbicide Treatment with 2,4-D and Diquat for Control of Noxious Weeds in Drano Lake, 2006 Skamania County, Washington

摘要

In January 2006 the State of Washington Department of Ecology and Skamania County signed an agreement for Drano Lake Milfoil Control. Skamania County subsequently contracted with a private source applicator to chemically treat Drano Lake to eradicate and/or control noxious weeds Eurasian watermilfoil (Myriophyllum spicatum) and curly leaf pondweed (Potamogeton crispus). Herbicide treatment occurred on July 31 and August 7, 2006. The purpose for the chemical treatment was to eradicate and/or control the growth and proliferation of invasive noxious water plants that interfered with recreational and commercial uses in Drano Lake. The herbicides 2,4-D and Diquat were used in the treatment area. Information profiles for the herbicides, including ecological effects and environmental fate, are described in Appendix A.