Steven Swain

Environmental Horticulture Advisor
Cooperative Extension Marin County
1682 Novato Boulevard
Suite 150-B
Novato, CA 94947
(415) 473-4204 Create VCard

Also in:
Sonoma County



M.S. Environmental Horticulture, UC Davis. 2001

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Lacan, I; Swain, SV; Perry, EJ (2022). Mistletoes. Pest Note. UC IPM. 7437, 6.
  • Valachovic, Y; Quarles, S; SV, Swain (2021). Reducing the vulnerability of buildings to wildfire: Vegetation and landscaping guidance. UC ANR. 8695, 1-12.
  • Downer, AJ; Swain, SV; Crump, A (2020). Anthracnose. Pest Note. UC IPM. 7420, 1-5.
  • Swain, Steven; Schmidt, D; M, Garbelotto (2020). Bark scribing as a treatment for sudden oak death: a case study in why controls matter. Proceedings of the 7th Sudden Oak Death Science and Management Symposium: Healthy Plants in a World With Phytophthora. USDA. PSW-GTR 268, 26-27.
  • Garbelotto, M; Schmidt, D; Swain, S; Hayden, K; Gugliemo, L (2017). The ecology of infection between a transmissive dead-end host provides clues for the treatment of a plant disease. Ecosphere. 8:5, 1-20.
  • Swain, SV; Garbelotto, M (2015). "Phytophthora ramorum can survive introduction into finished compost." California Agriculture 69(4): 237-241.
  • Bauermeister, M.; Savio, Y.; Surls, R.; Swain, S.V. (2013). Community Gardens. UC ANR. 8499, 1-16.
  • DiTomaso, J.M..; Roncoroni, J.; Swain, S.V.; Wright, S.D. (2013). Poison Hemlock. Pest Note. UC IPM. 74162, 1-4.
  • Swain, S.V.; Koike, S.T. (2012). "First report of twig canker on willow caused by Colletotrichum acutatum in California." Plant Disease 96(12): 1822.
  • Euphrat, F.D.; Swain, S.V.; Swanhuyser, D.; Butler, J.; Chesnut, A.; Batchelder, K.; Safford, C.; Cummings, E. (2012). Protecting forests across landscapes and through generations: the Sonoma County Forest Conservation Working Group. Proceedings of the Cost Redwood Forests in a Changing California: A Sympoium for Scientists and Managers. USDA FS. PSW-GTR 238:2, 603-609.
  • Alexander, J.; Swain, S.V. (2010). Sudden Oak Death. Pest Note 74151. UC IPM. 1-8.
  • Swain, S.V.; Schmidt, D.; Garbelotto, M. (2008). Preservation of Lithocarpus densiflorus diversity on California's Central Coast, a cooperative project with area residents. Proceedings of the Sudden Oak Death Third Science Symposium. USDA FS. PSW-GTR 214, 471-474.
  • Vettraino, A.M.; Huberli, D.; Swain, S.; Smith, A.; Garbelotto, M. (2006). "A new report of Phytophthora ramorum on Rhamnus purshiana in Northern California." Plant Disease 90: 246.
  • Swain, S.V.; Harnik, T; Mejia-Chang, M.; Hayden, K.; Bakx, W.; Creque, J.; Garbelotto, M (2006). "Composting is an effective treatment option for sanitization of Phytophthora ramorum infected plant material." Journal of Applied Microbiology 101: 815-827.
  • Swain, S.V.; Garbelotto, M. (2006). Extended abstract on the potential of Phytophthora ramorum to infect finished compost. Proceedings of the Sudden Oak Death Second Science Symposium. USDA FS. PSW-GTR 196, 483-486.
  • Vettraino, A.M.; Huberli, D.; Swain, S.; Beinapfl, J.C.; Smith, A.; Garbelotto, M. (2006). "First report of infection of maidenhair fern (Adiantum jordanii and A. aleuticum) by Phytophthora ramorum in California." Plant Disease 90: 379.
  • Huberli, D.; Reuther, K.D.; Smith, A.; Swain, S.; Tse, J.G.; Garbelotto, M. (2004). "First report of foliar infection of Rosa gymnocarpa by Phytophthora ramorum." Plant Disease 88: 430.

Non-Peer Reviewed

  • Lando, T; Kaspar, J; Mark, F; McCabe, M; Shortall, R; Swain, S; Swezy, M; Weber, J (2021). Ecologically Sound Practices for Defensible Space. Ecologically Sound Practices for Vegetation Management. Marin Wildfire Prevention Authority. 20.
  • Dirkse, A; Swain, S; Lewis, D. (2020). Japanese Knotweed Pocket Guide. UCCE Marin Publication. 1.
  • Swain, S; Schmidt, D; M, Garbelotto (2019). Managing sudden oak death: What works, and what doesn't. International Oaks. 30, 378-379.
  • Sims, L; Lacan, I; Swain, S.V; Garbelotto, M (2017). Phytophthora tentaculata: A new exotic and invasive disease. Western Arborist. 43, 48-50.
  • Swain, S.V; Eskalen, A; Lynch, S; Latham, S. (2017). Scolytid beetles and associated fungal symbionts threaten California hardwoods. Western Arborist. 43:1, 54-60.
  • Swain, SV (2016). Oaks as a component of rangeland management. Sonoma-Marin Farm News. 17.
  • Sims, L; Lacan, I; Swain, S; Garbelotto, M (2016) Phytophthora tentaculata, a new exotic and invasive disease. Retail Garden Center and Nursery IPM News 6, 3-4
  • Sims, L; Lacan, I; Swain, S; Garbelotto, M (2016) Phytophthora tentaculata, a new exotic and invasive disease. Green Bulletin 6, 3-5
  • Swain, SV (2015). Compost Tea. Western Arborist. ISA. 41:2, 22-23.
  • Swain, SV; Windbiel-Rojas, K (2015) Dealing with pantry pests. Retail Nursery and Garden Center IPM 5, 3
  • WD, Tietje; SV, Swain (2015). Help your oak tree tolerate severe drought. UCCE San Luis Obispo. 2.
  • Swain, SV (2015) Pines, Drought, & Beetles. Green Bulletin 5, 1,3
  • Swain, S.V. (2014) Biological fungicides: Do they work, and are they safe? Green Bulletin 4, 1-2
  • Swain, S.V. (2014). "Forest Stewardship." from
  • Swain, S.V. (2014). "Irrigation and Watering Guidelines." from
  • Swain, S.V. (2014). "Managing your curb appeal with less water." Retrieved 18 Dec 2014, from
  • Myers, M; S, Swain; D, Giraud (2014). North Coast Rain Gardens. UCCE Marin. 6.
  • Swain, S.V. (2014). "Oak Identification." from
  • Swain, S.V. (2013) Compost Tea. Green Bulletin 3, 4
  • Swain, S.V.; Koike, S.T. (2013). Distribution and host range of Colletotrichum acutatum on Salicaceae in San Francisco's North Bay area. Meeting Poster. American Phytopathological Society.
  • Swain, S.V. (2012) A new seed bug (Metapoplax ditomoides). Green Bulletin 2, 6
  • Swain, S.V. (2012) How irrigation practices can affect pest problems. Green Bulletin 2, 1,5
  • Parnay, S.; Swain, S.V. (2012). "PSA: A healthy soil is worth its weight in gold." Retrieved 18 Dec 2014, from
  • Bauermeister, M.; Swain, S.V.; Rilla, E. (2010). Marin County Community Garden Needs Assessment. UCCE Marin. 1-65.
  • Swain, S.V. (2007). Mortality projections and treatment recommendations for sudden oak death. Western Arborist. 33:2, 48-50.
  • Swain, S.V. (2002). "An Update on Phytophthora ramorum, causal agent of Sudden Oak Death." International Oaks 13: 38-45.
  • Swain, S.V. (2002). Composting Issues With Clopyralid. A Master Gardeners' information and FAQ list. UCCE Sonoma. 2 pp.

California Agriculture Article Contributions

ANR Workgroup Associations

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