Invasive Weed Control and Vegetation Management in a Truckee Meadows Urban Tributary
Tall whitetop (perennial pepperweed) is an invasive weed in Truckee Meadows, creating near-monocultures in riparian areas and meadows. Conventional methods like mowing and herbicides are insufficient due to its prolific seed production and deep taproot system. Effective long-term control requires proactive efforts, including pre- and post-emergent herbicides, reestablishing competitive perennial grasses and shrubs, and ongoing spot treatments.
Project Component 1: Habitat Restoration: The City of Reno proposes a 4-year project to treat 0.31 acres of drainageway in a major tributary to Chalk Creek, creating a demonstration model for effective vegetation management.
Project Component 2: Outreach and Education: STEM-based outreach will inform residents and schools about the treatment methods, with permanent signage on invasive weeds, stormwater pollution prevention, and watershed conservation.
Project Component 3: Discussions will be facilitated to explore alternative vegetation management techniques that use less herbicide, more mechanical labor, and targeted plant removal, involving the City of Reno, Truckee Meadows Parks Foundation, Nevada Department of Agriculture, and Friends of Valley Wood Park.
TMWA Benefit:
Priority II – Watershed Improvements: Removing tall whitetop and replanting with native species will reduce long-term sediment runoff to the drainageway. Tall whitetop disrupts topsoil structure and lacks long-term soil stabilization capabilities. Replacing it with grasses and local shrubs will reduce erosion. Additionally, if successful, the project will eliminate broad herbicide applications near the drainageway, decreasing the risk of herbicide pollution in waterways.
Priority IV – Re-Vegetation Projects: The project area is an upland habitat adjacent to an urban drainageway. Replacing tall whitetop with native vegetation will enhance drought resilience and provide long-term erosion protection. Tall whitetop does not pose significant fire risks, even when dry or dead.
Priority V – Rehab of Local Drainage Courses: The project area falls within an urban drainageway and major tributary to Chalk Creek, an impaired waterbody leading to the Truckee River.
Priority VI – Stewardship and Environmental Awareness: Outreach efforts will include professionally designed STEM-based signage to educate the public about invasive weeds, urban stormwater pollution prevention, and watershed protection. Additionally, mailers will be sent to residents and schools to inform them about the project’s purpose and encourage visits to the area, either through guided tours or independently.