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Volunteer Invasives Mapping Project Report

Display Report


First Year of Project
Station: Tetlin NWR
Region: 7
Contact Person: Bud Johnson
Contact Phone Number: 907-883-3664
Date Report Submitted:

List Type and/or Affiliation(s) of Volunteers: University of Alaska
Total Number of Volunteers Trained to Map:
Total Number of Volunteer Hours Spent Mapping:

List of Invasives Species Mapped:Common NameScientific Name
Which, if any, of these Species are Early Detection Species:
Total Number of Acres Mapped (since project initiation):
Have You Shared Mapping Data with USGS in Ft. Collins?

Describe Projects Initiated with Follow-Up Funds ($10,000): Tetlin National Wildlife Refuge (TNWR) encompass 377,167 ha (932,000 acres) south of the Alaska Highway and west of the US-Canada border, Alaska. Recent exploratory surveys indicate that invasive plants occur along the Alaska Highway. White sweetclover is the most abundant invasive plant along the Alaska Highway adjacent to TNWR. Although there has been no recorded encounter of white sweetclover within TNWR lands, it is known to disperse via rivers and roads. There are three creeks that cross the Alaska Highway and could act as vectors for invasive plants dispersal into TNWR lands. This project aims to determine effectiveness of chemical control of invasive plants at point sources on these creeks. The first objective of this project is to determine if invasive plants at point sources on the highway beside these creeks can be managed to prevent seed production near rivers. Recent roadwork has occurred on sections of the road just south of Tok, where continuous infestations of white sweet clover have been mapped. This construction involved major disturbance to the roadside that prevented any white sweet clover from producing seed as well as burying and remixing soils infested with white sweet clover. Because of the road construction our assumption is that white sweet clover populations will be temporarily reduced. The second objective of this project is to determine if early white sweet clover control after road construction will lead to near eradication of this plant species and what rate of chlorsulfuron give the best control of white sweet clover with the least injury to native plant species. Very little research has been conducted to determine the fate and transport of herbicides in cold climates. The third objective of this study is to measure the fate and transport of two herbicides, glyphosate and chlorsulfuron, at these sites.
Total Number of Acres Treated with Follow-up Funding: 0.81
Total Number of Acres Restored with Follow-up Funding:
Total Number of Volunteers Engaged in Treatment and/or Restoration: 1


How has this Project Benefited Invasive Species Management Efforts at Your Station? Preliminary results indicate that chlorsulfuron may be an alternative in the management of white sweetclover at point sources along the highway corridor. Other data is still being collected and analyzed.
What are some of the Lessons Learned and/or Troubleshooting Points that could be Shared with Others Engaged in Similar Activity?


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