Long Trade Lake has an area of 150 acres, a maximum depth of 13 ft, and a mean depth of 8 ft. On 6 June 2013, 16 areas totaling 9.3 acres, and averaging 0.58 acres (Figure 1) were treated with a liquid formulation of endothall (Aquathol K) to control curly-leaf pondweed (Potamogeton crispus). The endothall was applied at a target concentration of 2000 ug/L (2 mg/L) active ingredient (ai). Endothall application rates are specified as active ingredient (ai) in the product label, while endothall chemical analysis concentrations are specified as acid equivalent (ae). A concentration of 2000 ug/L ai is equal to 1419 ug/L ae. A lake wide endothall concentration was calculate to be 18 ug/L ae assuming complete lake wide dissipation and mixing.

Initial expectations were to treat 16 beds totaling 9.31 acres with Endothall (Aquathol K) at a concentration of 2ppm and 9 beds totaling 5.24 acres with liquid 2, 4-D (Navigate) at a concentration of 3 ppm (Table 1). Following the pretreatment survey at 159 points, it was decided to maintain all treatment areas as initially proposed,

Grant ACEI-110-12 awarded

Clean Boats, Clean Waters on Round Lake, Burnett County

Monitor Invasive Species on Round Lake, Burnett County