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Eurasian Water Milfoil <br />Mr. Welling reviewed experience with and management of Eurasian Water Milfoil, noting that <br />once it was established in a lake, it could not be eradicated, and the difficulty preventing it from <br />spreading within a lake once established. Only its abundance can usually be temporarily reduced <br />through lake -wide or large -scale control measures that reduce this invasive aquatic species and <br />allow native plants to increase. <br />Following Mr. Welling's presentation, Chair Ferrington opened the meeting up for discussion by <br />Board members and /or those residents in attendance at this time. <br />Karen Eckman <br />Questioned regarding whether shallow lakes experience heavier vegetation, Mr. Welling advised <br />that this was a tendency, but depended on water clarity and the role of plants in protecting <br />clarity. <br />Joan Manzara <br />Questioned regarding interaction between Curly -leaf Pondweed and Eurasian Water Milfoil <br />competing for resources, Mr. Welling affirmed that competition between the species may occur, <br />and speculated that Eurasian Water Milfoil seemed to dominate Curly -leaf Pondweed when both <br />were present in the same lake. <br />Edward Roberts <br />Mr. Roberts noted early inspections of Lake Owasso seemed to indicate Curly -leaf Pondweed in <br />April, but once the Eurasian Water Milfoil took hold, it seemed to diminish Curly -leaf <br />Pondweed. Mr. Roberts also sought additional information on grants available for management <br />of Curly -leaf Pondweed, how they were implemented and the best time of year for treatment <br />implementation; and whether there were any grants were available or recommended for fall <br />treatments when temperatures are lower. <br />Mr. Welling responded that some grants were available for pilot programs for lake -wide or bay <br />wide control, with specific herbicide protocols for early in the season when water temperatures <br />were no more than 60 degrees; with research showing treatments were most effective at those <br />lower temperatures, preventing bud development and catching plants in their early growth stages <br />Mr. Welling reviewed various treatments for early applications when native plants are growing at <br />lower rates and not being impacted by treatments for invasive species; and advised that to -date, <br />fall treatments had not been implemented, but expressed interest in such an approach. <br />Mark Maloney <br />Mr. Maloney questioned if it was the actual treatment or specific dosage that caused some <br />herbicide treatments to be unsuccessful. <br />Mr. Welling stated an herbicide trade named Sonar used years ago had proven ineffective; and <br />noted that more was learned about products and their results with each year's application, as well <br />as the longevity of the herbicide in water and impacts to native plants. Mr. Welling noted that <br />prior to the use of Sonar, the effectiveness of other available herbicides was found to be <br />3 <br />