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What will this Project do to Stop Hydrilla? The U.S. Army Corps of Engineers Buffalo District is continuing their efforts to treat hydrilla in the vicinity of Wells College Bay on Cayuga Lake where hydrilla was first observed in September 2016. The 2019 efforts represent the third year of fluridone (Sonar H4C) and chelated copper (Komeen treatment, and focus on a treatment area delineated based on observations of hydrilla beds from fall 2018. For 2019, USACE Buffalo has identified an approximately 120-acre area based on observations of hydrilla, divided into the following (see Figure 1. Lake Sonar H4C treatment block: Approximately 30 acres in Wells College Bay along 5,000 linear feet of shoreline between Wells Road and south of the outlet of Paines Creek. The Sonar H4C application will be split into a total of 10 treatments: two applications at 20 parts per billion (ppb) occurring over the first two treatments, and eight applications at 13.75 ppb occurring over treatments 3 through 10. 2. Spot treatment blocks: Approximately 90 acres, including four known plots for spot treatment, and an area to be monitored for hydrilla and treated with Komeen as needed. Post-treatment monitoring will be conducted to determine the success of the treatment and to determine whether additional treatments will be needed in the future. When will Treatment Occur? The initial application of Sonar H4C is targeted for the week of July 1, 2019, and a total of 10 treatments will occur between July and September. Treatments will initially occur approximately seven days apart, but later treatments may be spread further apart depending on dilution rates within the lake treatment area. Spot treatment of approximately five acres will be completed with Komeen likely during the week of July 22nd. Additionally, if there is any significant re-establishment of hydrilla beds in the 120-acre project area, those beds would be spot treated with Komeen on or about the week of August 12th, 2019. Herbicide will routinely be applied on Thursdays, unless there are weather delays. The herbicide will only be applied if there are favorable weather conditions. Any changes in the treatment schedule will be communicated to the public. HYDRILLA CONTROL DEMONSTRATION PROJECT Stop hydrilla from expanding further into other areas of New York State and the Great Lakes! US Army Corps of Engineers® Buffalo District BUILDING STRONG® US Army Corps of Engineers® Buffalo District BUILDING STRONG® [PHONE REDACTED].03 CAYUGA LAKE AT AURORA, NEW YORK Who Can I Contact for More Information? Michael Greer, Buffalo District, U.S. Army Corps of Engineers (716) 879-4229 I [EMAIL REDACTED] Herbicide Information For more information on Sonar H4C and Komeen refer to the link below for product labels: product-labels-new-york-2017 Will there be any Restrictions on Use of the Lake during Treatment? A water sampling program will be implemented to monitor fluridone concentrations within the lake. The program will ensure that the herbicides are applied at the targeted concentration rates and will also determine herbicide dispersion. Restrictions There are no restrictions for fishing, swimming, or livestock/pet water consumption at the proposed application rates of Sonar H4C and Komeen There ARE restrictions for using water treated with Sonar H4C for irrigation and for potable water treated with Sonar H4C and Komeen if treated water concentra- tions are above what is indicated in Table 1. Signs will be placed at all public access locations within the treatment area to notify the public of these restrictions. Table 1 Water Use Restrictions Sonar H4C Established Row Crops/Turf/ Ornamental Plants Product Komeen Do not use if concentrations > 10 ppb ppb parts per billion Tentative Treatment Schedule (the Week of…) July 1 1st Sonar H4C treatment July 8 2nd Sonar H4C treatment July 15 3rd Sonar H4C treatment July 22 4th Sonar H4C treatment/ 1st Komeen treatment* July 29 5th Sonar H4C treatment August 5 6th Sonar H4C treatment August 12 7th Sonar H4C treatment 2nd Komeen treatment* August 19 8th Sonar H4C treatment August 26 9th Sonar H4C treatment September 2 10th Sonar H4C treatment WEEK OF Tobacco, Tomatoes, Peppers and Similar Plants, and Newly Seeded Crops/Seedbeds or Areas to be Planted Including Overseeded Golf Courses Nursery, Greenhouse, Hydroponics None None None Do not use if concentrations > 5 ppb Potable Water Do not use if concentrations > 1 ppb; FasTEST required Do not use if concentrations > 50 ppb* Do not use if concentrations > 200 ppb** * Applications of Sonar H4C will be below the listed thresholds. Application of Komeen will only exceed these concentrations in small spot treatment areas that are not expected to exceed a cumulative total of 5 acres for the season. These spot treatment areas are away from potable water intakes. *Komeen treatments will be scheduled as needed. Dates identified above may change. ---PAGE BREAK--- Source: Cayuga Lake Watershed Network 2012 Leaf margins have distinct, toothed edges Lance-shaped leaves in whorls of 3-10 Tuber Leaves are small, sharply toothed Hydrilla is a very aggressive aquatic invasive plant native to Korea. It is a submerged aquatic plant that is typically rooted in shallow water, with long stems that can grow up to 30 feet in length and up to one inch per day. These stems branch at the water’s surface and grow horizontally, forming thick, dense mats. Hydrilla also produces tubers, small potato-like structures, which store food for the plant and also allow it to overwinter in the substrate of the waterbody and sprout in the spring. What Does Hydrilla Look Like? Key plant identification features: • Pointed, bright green leaves about 5/8 inch long with small teeth on the edges • Leaves generally grow in whorls of 3-10 around the stem, though 5 leaves are most common • Floating white flowers and small white to yellowish potato-like tubers attached to the roots What is Hydrilla and What Concerns Does it Pose to Cayuga Lake? Source: Scott Kishbaugh, NYSDEC Hydrilla whorls up close Source: Leslie Mehrhoff, from the U.S. Forest Service Why Do We Need to Stop It? • It is one of the world’s most invasive aquatic plants. • It can grow up to one inch per day. • It forms dense mats that block sunlight and displace native plants. • It decreases dissolved oxygen levels which can lead to fish kills. • It destroys waterfowl feeding areas and fish spawning sites. • It reduces the weight and size of sportsfish due to loss of open water and native vegetation. • It excludes boating, fishing, and swimming due to its thick mats. • It can hurt the local economy due to impacts on tourism and waterfront property values. How Does it Spread? • Primary method of spreading is through hydrilla fragments on recreational boats and trailers • Even tiny fragments of hydrilla can sprout roots and establish new populations • Fragments float and can be spread via wind and water currents l 0 200 400 600 800 1,000 Feet Potable Water Intake Lake Sonar H4C Treatment Block Known Komeen Spot Treatment Blocks Areas to be Monitored for Komeen Spot Treatments as Needed N Project Area Map