Between August 2009 and August 2010 the Union Bay Natural Area chalked up 2,050 volunteer service and educational tour hours from student organizations, University of Washington dorm residents, local community groups, the UBNA service corps, and University of Washington courses. There are numerous opportunities to get involved with the UBNA this academic year through the courses offered as a part of the Restoration Ecology Network, the Society for Ecological Restoration student guild.
UWBG IPM staff will be out on Union Bay, Wednesday, September 22nd, w/ spray contractor NW Aquatic Eco-Systems. All canoe landings and shoreline trailheads will be posted. This is the second of two follow-up spray applications in our effort to control the class A noxious weed, Garden Loosestrife.
Garden Loosestrife (GL) control contractor, NW Aquatic Ecosystems, along with UW Botanic Garden IPM staff, will complete initial 2010 treatment on Wednesday, August 18th. The Waterfront Trail between Foster Island and MOHAI will be closed early am to public temporarily for contractor access to GL growing near the trail. Signs will be posted on barricades at both trailhead entrances and also staffed during spray period to avoid public breaching the barricades. Trail will be reopened once material has dried on foliage. The remainder applications will be accomplished via boat in and around Marsh and other islands and inlets throughout UW Botanic Gardens managed Union Bay shorelines.
Scheduled pm Kayak tours will not be disrupted. Applications within tour boundaries will be completed in am.
There will be a follow-up treatment later in September. Notice will go out as soon as date is set.
For further information, call 206-543-8800
For a second year, Northwest Aquatic Eco-Systems along with UW Botanic Garden will begin spray work to control Lysimachia vulgaris (garden loosestrife), a state-listed noxious weed occurring along Union Bay shorelines including the Union Bay Natural Area and the Arboretum’s Foster and Marsh Islands the first week of August. King County requires control of this aggressive and invasive weed, which poses a serious threat to the native character of area wetlands. In 2009, DoE provided a 5-year grant for $75,000 to fund loosestrife control.
In mid-July members of King County’s Noxious Weed Control Program and UW Botanic Gardens staff mapped the extent of the weed in the areas listed above. Comparison of the maps from year 1 to year 2 demonstrated slight control had taken place. Once again the weed will be controlled with an aquatically approved herbicide by the contractor, Northwest Aquatic Eco-Systems using airboats and other specialized equipment.