Source: California Invasive Plant Council


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

Delairea odorata (=Senecio mikaniodes)(Cape Ivy, German Ivy)

Delairea odorata (=Senecio mikaniodes)
Delairea odorata (=senecio mikaniodes)
Photo courtesy Joseph DiTomaso

Delairea odorata (=Senecio mikaniodes) (Cape-ivy, German-ivy) is a perennial vine (family Asteraceae) found along the coast of California and in the San Gabriel Mountains. Cape-ivy is especially problematic in coastal riparian areas, though it may also invade inland riparian areas, moist forests, and oak woodlands. Vines are known to form dense mats of vegetation over trees and shrubs, killing plants underneath. It is toxic to animals and fish can be killed when plant materials are soaking in waterways. Stem, rhizome and stolon fragments resprout if left in the ground after treatment.

Cal-IPC Inventory rating: High

Cal-IPC Resources on Delairea odorata

Cal-IPC News Articles

  • Abreu, M. (2009). CNPS removes weeds at Pt. Cabrillo. Cal-IPC News. 17: 11.
  • O'Rourke, B. and J. Horenstein (2009). Tackling invasive plants on California Sept. of Fish & Game lands. Cal-IPC News. 17: 12.
  • Schwartz, S. (2009). East Bay volunteers head to the hills and the shores. Cal-IPC News. 16: 8-9.
  • Robison, R. (2004). Reproductive biology of Cape ivy (Delairea odorata) in California, Cal-IPC.
  • Blumin, L. and D. Gluesenkamp (2002). Manual removal of cape ivy in Volunteer Canyon - Bolinas Lagoon Preserve, Audubon Canyon Ranch, Stinson Beach, California.
  • Steinmaus, S. (2002). Predicting plant invasion with modeling. CalEPPC News. 10: 5-7,9.
  • Steinmaus, S. (2002). Predicting plant invasion with modeling. CalEPPC News. 10: 5.
  • Balciunas, J. (2001). Cautionary note for land managers & stewards: Viable seed production by cape ivy in California finally confirmed. CalEPPC News. 9: 13.
  • Robison, R. (2001). Help needed in collecting more seed: Cape ivy germinating in California and Oregon. CalEPPC News. 9: 8-9.
  • Shoulders, C. (2001). Successful removal of Cape ivy and recovery of riparian vegetation on two acres along Redwood Creek, Marin County: changes in cover three years after removal.
  • Balciunas, J. (2000). Biological control of cape ivy project reaches milestone. CalEPPC News. 9: 3-4.
  • Balciunas, J. (2000). Test plants needed for biocontrol of cape ivy project. CalEPPC News. 9: 4-6.
  • Bell, C. E., M. Evans, et al. (2000). Exotic pest plants, Calif. Assoc. of Nurserymen, and CalEPPC. CalEPPC News. 9: 9-10.
  • Grobbelaar, E., J. Balciunas, et al. (2000). A survey in South Africa for insects with potential as biological control agents for Cape ivy (Delairea odorata Lemaire).
  • (1999). Richmond weed abatement ordinance. CalEPPC News. 7: 10.
  • 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.
  • Fobert, M. (1998). Some tips on herbicide treatment of cape ivy (Delaireria odorata). CalEPPC News. 6: 4-5.
  • Warner, P. (1998). CalEPPC Symposium '97. CalEPPC News. 6: 6-8.
  • Kelly, M. (1997). Lessons from the front: Taking stock to avoid surprises. CalEPPC NEWS. 5: 4-7.
  • Moore, K. (1997). Battling the Kudzu of the west: Controlling cape ivy (formerly German ivy) by hand removal. CalEPPC News. 5: 4-5.
  • Bossard, C. and C. Benefield (1995). War on German ivy: good news from the front.
  • Elliott, W. (1994). German ivy engulfing riparian forests and heading for the uplands. CalEPPC News. 2: 9.
  • Chipping, D. (1993). German ivy infestation in San Luis Obispo. CalEPPC News. 1: 15.
  • (1993). Working group reports on weed control methods and applications for Arundo, french broom, german ivy, hoary cress, yellow starthistle, and pampasgrass. CalEPPC News. 1: 8-10.

Cal-IPC Symposium Proceedings

  • Kesel, R. (2009). Urban invasions: Analyzing recovery of habitat fragments in San Francisco following the removal of Genista monspessulana and Delairea odorata. Cal-IPC Symposium 2009. Visalia, CA, California Invasive Plant Council.
  • Stern, J. and F. Watson (2008). An Assessment of Control Methods for Cape ivy in Coastal Riparian Ecosystems. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
  • Molinari, N., K. Seward, et al. (2007). Ecology and future biocontrol of cape ivy in southern California. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Knapp, J., S. Ratay, et al. (2007). Eradicating 25 species- Challenges and successes of switching from population to seed bank management on Catalina Island, California. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Burns, C. and S. Adams (2007). Trials on chemical control of periwinkle (Vinca major) and Cape ivy (Delairea odorata). California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
  • Baxter, T. and J. Bromberg (2005). Cape ivy removal at Golden Gate National Recreation Area and Point Reyes National Seashore. California Invasive Plant Council Symposium 2005. Chico, CA.
  • Bossard, C., K. Moore, et al. (2005). A test of repeat flaming as a control for poison hemlock (Conium maculatum), Cape ivy (Delairia odorata), and periwinkle (Vinca major). California Invasive Plant Council Symposium 2005. Chico, CA.
  • Balciunas, J. (2004). Biological control of Cape ivy: Coming soon? California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Giessow, J. and M. Newhowser (2004). Riparian working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Knapp, J. (2004). A gardener's dream, a land manager's nightmare: The spread of horticultural invasive plants into the wildlands of Santa Catalina Island. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Robison, R. (2004). Reproductive biology of cape ivy (Delairea odorata) in California. 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, CA.
  • Dudly, T. (2003). Riparian invaders: A multi-species approach. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
  • Blumin, L. and D. Gluesenkamp (2002). Manual removal of cape ivy in volunteer canyon - Bolinas Lagoon Preserve, Audubon Canyon Ranch, Stinson Beach, California. California Exotic Pest Plant Council Symposium 2002. Sacramento, CA.
  • Shoulders, C. (2001). Successful removal of cape ivy and recovery of riparian vegetation on two acres along Redwood Creek, Marin County: Changes in cover three years after removal. California Exotic Pest Plant Council Symposium 2001. San Diego, CA.
  • Grobbelaar, E., J. Balciunas, et al. (2000). A survey in South Africa for insects with potential as biological control agents for cape ivy (Delairea Odorata Lemaire). California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Hamingson, E. E. and M. E. Alvarez (2000). Assessing cape-ivy control in two California National Parks. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Benefield, C. B. (1999). Private and public funding opportunities: Sources of funding for weed management programs. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
  • Cooper, V. K. and B. J. Moritsch (1999). Weeding the wilderness: Non-native plant management at Point Reyes National Seashore. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
  • Robison, R., E. Grotkopp, et al. (1999). Cape Ivy (Delairea odorata) distribution in California and Oregon. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
  • Archbald, G. (1998). Mechanical control methods: beyond weed bashing. California Exotic Pest Plant Council Symposium '98. Ontario, CA.
  • Alvarez, M. E. (1997). Management of cape-ivy (Delairea odorata) in the Golden Gate National Recreation Area. California Exotic Pest Plant Council Symposium '97. Concord, CA.
  • Farrell, S. (1997). Stewardship and resource education at the Presidio. California Exotic Pest Plant Council Symposium '97. Concord, CA.
  • Bossard, C. and C. Benefield (1995). War on German ivy: good news from the front. California Exotic Pest Plant Council Symposium '95. J. Lovich, J. Randall and M. Kelly. Pacific Grove, CA.

Other Resources on Delairea odorata (=senecio mikaniodes)

  • USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
  • CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
  • CalPhotos - Images of plants taken mostly in California.
  • Natural Resource Projects Inventory - State database with information on resource management projects throughout California. Query by the species of interest.