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United States Department of Agriculture

Agricultural Research Service

Title: INTEGRATED CONTROL AND ASSESSMENT OF KNAPWEED AND CHEATGRASS ON DEPARTMENT OF DEFENSE INSTALLATIONS)

Author
item Paschke, Mark
item Redente, Edward
item Warren, Steven
item Klein, Donald
item Smith, Lincoln - Link
item Klawitter, Alan
item Mclendon, Terry

Submitted to: Research and Development Magazine
Publication Type: Government publication
Publication Acceptance Date: 12/30/2001
Publication Date: 12/30/2001
Citation: Paschke, M.W., Warren, S.D., Klein, D.A., Smith, L., Klawitter, A.L., Mclendon, T. 2001. Integrated control and assessment of knapweed and cheatgrass on Department of Defense installations. Report to Department of Defense, Strategic Environmental Research and Development Program (SERDP). 33 p.

Interpretive Summary:

Technical Abstract: We are investigating alternative control and assessment strategies for spotted and diffuse knapweeds and cheatgrass on two U.S. military installations: Fort Carson, Colorado and Yakima Training Center, Washington. We are attempting to control alien invasive weeds by using a combination of four manipulations that accelerate natural secondary succession. These are: 1) reduction of the weed population using biological control (for knapweeds) or burning (for cheatgrass), 2) reducing soil nitrogen availability, 3) reseeding with desirable mid- and late-seral plant species, and 4) reintroduction of a native late-seral soil microbial community. Our research plots are being monitored using remote sensing techniques in order to develop methods for assessing the status of weed populations and monitoring large-scale effectiveness of control methods. Results will be extrapolated to larger spatial and temporal scales using an ecosystem dynamics model in order to gain insight into ecological mechanisms of control methods so that we can project the likely effectiveness of single and combined control methodologies. Results from the 2001 sampling (year two) indicate that significant desirable treatment effects have already occurred in many of the test plots, including reduced weed densities.

Last Modified: 8/24/2016
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