Source: California Invasive Plant Council


URL of this page: http://www.cal-ipc.org/ip/management/plant_profiles/Lepidium_latifolium.php

Lepidium latifolium (perennial pepperweed, tall whitetop)

Lepidium latifolium
Lepidium latifolium
Photo courtesy UC Davis

Lepidium latifolium (perennial pepperweed, tall whitetop) is a perennial herb (family Brassicaceae) found in moist or seasonally wet sites throughout California. Perennial pepperweed is grows very aggressively, forming dense colonies that exclude native species. It reproduces both by seed and vegetatively from its roots and small root fragments. Seeds and root fragments are spread easily by flooding and soil movement, and seeds stick to tires, shoes, and animals, making continued dispersion difficult to avoid. Perennial pepperweed is a state-listed noxious weed in California and many other western states.

Cal-IPC Inventory rating: High

Cal-IPC Resources on Lepidium latifolium

Cal-IPC News Articles

  • Whitcraft, C. (2011). Perennial pepperweed control decision guide. Cal-IPC News 19: 4-5, 11. Guides available for wetlands or uplands (pdf).
  • Bell, C. (2010). Perennial pepperweed control in riparian areas. Cal-IPC News. 18: 10, 11.
  • Schwartz, S. (2009). East Bay volunteers head to the hills and the shores. Cal-IPC News. 16: 8-9.
  • Block, G., I. Hogle, et al. (2006). Invasive plant monitoring using volunteers: A nationwide effort. Cal-IPC Symposium, Rohnert Park, CA, California Invasive Plant Council.
  • Etra, J. (2006). Tall whitetop control on the 102 Ranch and implications for other applications. Cal-IPC Symposium, Rohnert Park, CA, California Invasive Plant Council.
  • Leininger, S. and T. C. Foin (2006). Water, salt, and pepper: Lepidium latifolium invasion potential along a salinity and moisture gradient. Cal-IPC Symposium, Rohnert Park, CA, California Invasive Plant Council.
  • Ogden, J. E., M. Renz, et al. (2007). "Dip-and clip": A new treatment for herbaceous weeds. Cal-IPC News. 14: 7.
  • Spenst, R. and T. C. Foin (2006). Is glyphosate a good choice for perennial pepperweed (Lepidium latifolium) control in tidal wetlands in the San Francisco Estuary? Cal-IPC Symposium, Rohnert Park, CA, California Invasive Plant Council.
  • Wilson, R., J. DiTomaso, et al. (2006). Integrated management strategies for perennial pepperweed. Cal-IPC Symposium, Rohnert Park, CA, California Invasive Plant Council.
  • Brigham, C. (2004). Towards eradication of Lepidium latifolium at Paramount Ranch: control methods and a test of restoration treatments, Cal-IPC.
  • Richardson, B. (2004). The A-rated north. Cal-IPC News. 12: 4-5,14.
  • Spenst, R. O., T. C. Foin, et al. (2004). Invasion dynamics of perennial pepperweed along the salinity gradient, Cal-IPC.
  • Donaldson, S. (2003). Fighting weeds in the Tahoe basin. CalEPPC News. 11: 7.
  • Richardson, B. (2003). Invasive Spartina: "Just another weed": Biology, spread, and prospects for control. Cal-IPC News. 11: 4-6.
  • Horney, M. (2002). New remote sensing tool under evaluation. CalEPPC News. 10: 4.
  • Kelly, M. (1999). Roundup of Arundo projects reveals commitment, strategic weakness. CalEPPC News. 7: 4-9.
  • DiTomaso, J. (1998). Results of the CalEPPC questionnaire at Symposium '98 in Ontario. CalEPPC News. 6: 4.
  • Young, J. A., D. E. Palmquist, et al. (1995). Ecology and control of perennial pepperweed (Lepidium latifolium L.).
  • Young, J. A. and C. Turner (1995). Lepidium latifolium L. in California. CalEPPC News. 3. 3: 4-5.
  • Trumbo, J. (1994). Perennial pepperweed: A threat to wildland areas. CalEPPC News. 2: 4-5.

Cal-IPC Symposium Proceedings

  • Lardiere, B. M. and D. Bieber (2009). Maintaining riparian habitats after initial invasive plant treatments on Camp Pendleton. Cal-IPC Symposium 2009. Visalia, CA, California Invasive Plant Council.
  • Block, G., I. Hogle, et al. (2008). Perennial pepperweed (Lepidium latifolium) control in tidal marsh of San Pablo Bay. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
  • Andrew, M. and S. L. Ustin (2008). Ecological remote sensing of invasion by perennial pepperweed. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
  • Vanderhoof, M. and C. Rogers (2007). Distributional patterns of perennial pepperweed (Lepidium latifolium) in the San Francisco Bay, a CalFed project. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Hutchinson, R. A., J. H. Viers, et al. (2007). Assessing non-target vegetation response in the wake of perennial pepperweed (Lepidium latifolium) eradication at the Cosumnes River Preserve. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Erskine-Ogden, J., M. J. Renz, et al. (2007). Managing herbaceous perennials in the Tahoe Basin. California Invasive Plant Council Symposium 2007. San Diego CA, California Invasive Plant Council.
  • Codianne, J. and L. Dumont (2007). Coyote Creek floodplain reclamation project: Re-establishing native plant habitat. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Etra, J. (2006). Tall whitetop control on the 102 Ranch and implications for other applications. Cal-IPC Symposium. Rohnert Park, CA.
  • Leininger, S. and T. C. Foin (2006). Water, salt, and pepper: Lepidium latifolium invasion potential along a salinity and moisture gradient. Cal-IPC Symposium. Rohnert Park, CA.
  • Spenst, R. and T. C. Foin (2006). Is glyphosate a good choice for perennial pepperweed (Lepidium latifolium) control in tidal wetlands in the San Francisco Estuary? Cal-IPC Symposium. Rohnert Park, CA.
  • Wilson, R., J. DiTomaso, et al. (2006). Integrated management strategies for perennial pepperweed. California Invasive Plant Council Symposium '06. Rohnert Park, CA.
  • DiTomaso, J. M. (2005). Efficacy and safety of new herbicides on the horizon. California Invasive Plant Council Symposium 2005. Chico, CA.
  • Hogle, I. B. and R. Waegell (2005). Perennial pepperweed control experiment at the Cosumnes River Preserve. California Invasive Plant Council Symposium 2005. Chico, CA.
  • Sperber, T. and F. T. Griggs (2005). Suppressing exotic weeds on restoration projects using an aggressive herbaceous understory. California Invasive Plant Council Symposium 2005. Chico, CA.
  • Brigham, C. (2004). Towards eradication of Lepidium latifolium at Paramount Ranch: Control methods and a test of restoration treatments. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Clines, J., J. DiTomaso, et al. (2004). Fire working group. California Invasive Plant Council Symposium 2004. Ventura, California, CA.
  • Giessow, J. and M. Newhowser (2004). Riparian working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Hogle, I. H., J. H. Viers, et al. (2004). Floodplain invasion: Tracking pepperweed expansion in the Cosumnes River. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Rogers, C. (2004). Distribution of perennial pepperweed in Bay-Delta wetlands: a CalFed mapping project. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Schoenig, S., D. DiPietro, et al. (2004). Mapping working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Spenst, R. O., T. C. Foin, et al. (2004). Invasion dynamics of perennial pepperweed along the salinity gradient. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Carruthers, R. and J. Buettner (2003). Biocontrols: Progress and ongoing needs. California Invasive Plant Council Symposium 2003. Kings Beach, California, CA.
  • Donaldson, S., W. West, et al. (2003). Getting the job done: Working within the regulatory environment at Lake Tahoe to manage weeds. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • Dudly, T. (2003). Riparian invaders: A multi-species approach. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • Hogle, I., J. H. Viers, et al. (2003). Spatial analysis of perennial pepperweed infestation in a seasonal floodplain. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • Peters, S., J. Etra, et al. (2003). Tall whitetop eradication and native plant community restoration. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • Wilson, R. (2003). Perennial pepperweed: What works? California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • .
  • Pyke, D. A. (2000). The use of fire to control exotic plants. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Thomsen, C. D. (2000). Bear Creek watershed restoration program. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Renz, M. J. and J. M. DiTomaso (1999). Mechanism(s) responsible for enhancing the effectiveness of glyphosate in controlling perennial pepperweed. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
  • Kelly, M. (1998). SWAT: Special weed action teams as ambassadors for education and energy. California Exotic Pest Plant Council '98 Symposium. Ontario, CA.
  • DiTomaso, J. M. (1997). Risk analysis of various weed control methods. California Exotic Pest Plant Council Symposium '97. Concord, CA.
  • Donaldson, S. G. (1997). Flood-borne noxious weeds: Impacts on riparian areas and wetlands. California Exotic Pest Plant Council Symposium '97. Concord, CA.
  • DiTomaso, J. M. (1995). Overview of extension non-crop weed research in California. California Exotic Pest Plant Council Symposium '95. J. Lovich, J. Randall and M. Kelly. Pacific Grove, CA.
  • Young, J. A., D. E. Palmquist, et al. (1995). Ecology and control of perennial pepperweed (Lepidium latifolium L.). California Exotic Pest Plant Council Symposium '95. J. Lovich, J. Randall and M. Kelly. Pacific Grove, CA.

Other Resources on Lepidium latifolium