Agenda Packets - 2024/03/11 - Laserfiche WebLink

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Mounds View Silver View Park Pond diminished, a seed mix with native grasses, sedges, and broadleaf flowers can be sown to add diversity, functionality, and resilience. 4.1.3 HERBACEOUS WEED CONTROL Herbaceous weed spot treatments are recommended for reducing cover by invasive plants and problematic weeds such as Canada thistle, leafy spurge, purple loosestrife, creeping Charlie, garlic mustard, burdock, motherwort, nonnative cattail, reed canary grass, and smooth brome. Treatment for some of these species may be combined with broadcast spraying as part of site preparation for native seeding/planting. As with invasive shrub control, multiple treatments should be anticipated. For the herbaceous weeds, successful control may require multiple treatments within one growing season and for at least 2-3 growing seasons. The specific control methods used, including herbicide selection and timing, will be species -dependent. Treatments should involve the most selective herbicides applied at the lowest effective rates for control based on herbicide label recommendations. Herbicide applications to flowering target species should be avoided when pollinators are highly active. Purple loosestrife is extremely abundant through the wetland complex, so biocontrol may be the best option for larger -scale control combined with spot herbicide applications to scattered individuals around the pond shorelines. Biocontrol will not eliminate purple loosestrife and effectiveness varies from year to year, but it can reduce total purple loosestrife cover for enabling better expression of native herbaceous plants. 4.1.4 NATIVE SEEDING Native seeding is recommended to enhance ground layer vegetation cover throughout the project area. No site preparation, other than weed spot treatments, may be needed in areas with some existing native vegetation. Spring seeding native woodland grasses and sedges is effective for woodland areas. The seeds will germinate during the growing season. For broadleaf seed mixes, fall seeding is recommended to enhance germination for many native broadleaf wildflowers. Other than monitoring establishment, no other grow -in maintenance activities are needed are than weed spot treatments while the herbaceous plants establish in woodland and lowland hardwood areas. Lawn areas planned for conversion to native plantings will require site preparation prior to seeding. Site preparation may involve a combination of broadcast spraying with a non -selective herbicide such as glyphosate to kill the existing sod, and light soil scarification. Mowing will be required during the first growing season after seeding to aid establishment of the native seedlings. Establishment monitoring will determine whether mowing is needed during the second growing season. At a minimum, spot weed mowing and spot herbaceous weed treatments should be anticipated for grow -in maintenance for native ground cover establishment during the second and third growing seasons. Project Number: 193806465 21