Gail  Langellotto


Urban Horticulture
Community Horticulture
Master Gardeners
Master Gardener Coordinators
Gail Langellotto
Professor, Urban and Community Horticulture Extension, Statewide Master Gardener Program Coordinator

The ecology of urban and suburban landscapes remains relatively unexplored - although such habitats have great potential to positively contribute to the conservation of pollinators, parasitoids and the ecosystem services that they confer. 

Working with the OSU Extension Master Gardeners, OSU graduate students, state and local agencies, as well as non-profits and other non-governmental organizations, I am helping to develop a better research-based understanding of how to design and sustainably manage gardens and parks to maximize ecosystem services.  My Extension and Outreach efforts are focused on communicating these and other research-backed management practices to home gardeners, commercial landscapers, and others.

OSU Campus
Department of Horticulture
4017 Ag and Life Sciences Bldg
Corvallis, OR 97331
United States
(541) 737-5175


I am the principle investigator of the Garden Ecology Lab at Oregon State University.

My overall research interests are in developing a better understanding of how gardens and greenspaces can be designed and managed so that they contribute to rather than detract from ecosystem services.  I am particularly interested in the services of pollination and biological control in gardens and other greenspaces.


I currently teach Insect Agroecology (ENT/HORT 499/599) and Introduction to Insect Pest Management (ENT 399) in the Spring Term.


I was born in Baltimore, MD, and spent the first 30 years of my life living within a 40 mile radius of where I was born.  Although I did not have the opportunity to hike pristine habitats or to meaningfully explore natural areas, I fell in love with ecology (specifically, insect ecology) during my time as an undergraduate and graduate student.

Although my graduate and post-doctoral work was conducted in natural (e.g. forests, salt marshes, grasslands) or agricultural (e.g. cotton, papaya) areas - my first job was at a University in the south Bronx.  Knowing that natural or agricultural field sites would be difficult to find - I quickly reconnected with my love for cities, and began to study the ecology of pollinators in urban community gardens.


2002 Ph.D., Entomology, University of Maryland College Park (Advisor: Dr. Robert Denno)
1996 M.S., Entomology, University of Maryland College Park (Advisor: Dr. Robert Denno)
1993 B.S., Biology, University of Maryland Baltimore County

Professional Experience

  • 2013 - Present.  Associate Professor and State Program Leader, Oregon Master Gardener Program.  Department of Horticulture, Oregon State University.
  • 2007-2013. Assistant Professor and State Program Leader, Oregon Master Gardener Program. Department of Horticulture, Oregon State University
  • 2003-2007. Assistant Professor. Department of Biological Sciences, Fordham University
  • 2002-2003. Post-Doctoral Research Associate. Department of Entomology, University of California Davis (Supervisor: Dr. Jay Rosenheim)
  • 2000-2001. Coordinator. University Teaching and Learning Program, Center for Teaching Excellence, University of Maryland
  • 2001-2002. Gahan Fellow. Department of Entomology, University of Maryland
  • 1994-2000. Graduate Teaching Assistant. University of Maryland

Professional Affilations

  • American Society for Horticultural Science
  • Entomological Society of America
  • Oregon Agricultural Extension Association
  • Oregon State University Extension Association
  • Pi Alpha Xi
I accept graduate students for Horticulture
I can serve on graduate committees


Recent Research Publications

Hall, D. M., Camilo, G. R., Tonietto, R. K., Ollerton, J., Ahrné, K., Arduser, M., Ascher, J. S., Baldock, K. C. R., Fowler, R., Frankie, G., Goulson, D., Gunnarsson, B., Hanley, M. E., Jackson, J. I., Langellotto, G., Lowenstein, D., Minor, E. S., Philpott, S. M., Potts, S. G., Sirohi, M. H., Spevak, E. M., Stone, G. N. and Threlfall, C. G. (2017), The city as a refuge for insect pollinators. Conservation Biology, 31: 24–29. doi:10.1111/cobi.12840

Bradley, L. K., E. M. Bauske, T. A. Bewick, J. R. Clark, R. E Durham, G. Langellotto, M. H. Meyer, M. Pooler, S. Dorn. 2016. Developing a national strategic plan for consumer horticulture. HortTechnology. 26: 372-378.

Cuong, N. L., G. A. Langellotto, T. L. Thuy, V. Quynh, N. T. T. Thuy, A. A. Barrion and Y. H. Chen. 2016. Arthropod diversity and abundance in wild rice, Oryza rufipogon, in the Mekong Delta, Vietnam. Annalsof the Entomological Society of America. 109(4): 541-554.

Langellotto, G. A. and S. Dorn. 2016. An online resource site for Extension Master Gardener coordinators. Journal of Extension. [On-line] 54(3) Article 3TOT3. Available at:

Langellotto, G. A., D. Moen, T. Straub, S. Dorn.  2015.  The first nationally unifying mission statement and program standards for Extension Master Gardener programs at Land Grant Universities.  Journal of Extension [On-line] 53(1) Article 1IAW1. Available at:

Langellotto, G. A. 2014. What are the economic costs and benefits of home vegetable gardens? Journal of Extension [On-line] 52(2) Article 2RIB5. Available at:

Fry, J. B. and G. A. Langellotto.  2013.  Generating potential solutions for dealing with problem volunteers. Journal of Extension [On-line] 51(6) Article 6TOT3. Available at:

Chen, Y. H., G. A. Langellotto, A. T. Barrion and N. L. Cuong.  2013. Arthropod diversity and community composition in seven wild and cultivated rice fields in the Mekong Delta, Vietnam.  Annals of the Entomological Society of America. 106: 100-110.

Langellotto-Rhodaback, G. A. and W. Miller.  2012.  Demographics and perceptions of Master Gardener volunteers in Oregon.  International Journal of Volunteer Administration.  Vol. XXIV, No. 2.

Langellotto, G. A. and A. Gupta*. 2012. Gardening increases vegetable consumption in school-aged children: a meta-analytical synthesis. HortTechnology. 22: 430-445.

Matteson, K. C.* and G. A. Langellotto. 2012. Evaluating community gardens as habitat for an urban butterfly.Cities and the Environment. Vol. 5: Iss. 1, Article 10.Available at: Available at:

Matteson, K. C. and G. A. Langellotto. 2011. Small scale additions of native plants fail to increase pollinator diversity in urban gardens. Insect Conversation and Diversity. 4: 89-98.

Schaumburg, K., W. M. Giuliano and G. A. Langellotto. 2011. Avian-habitat relationships in urban and suburban tidal marshes of Connecticut. Urban Habitats. 6:

Langellotto-Rhodaback, G. A. 2010. Enrollment, retention and activity in an online Master Gardener Course. Journal of Extension [On-line] 48(4) Article 4RIB3. Available at:

Matteson, K. C. and Langellotto, G. A. 2010. Determinates of inner city butterfly and bee species richness. Urban Ecosystems 13: 333-347.

Matteson, K. C. and G. A. Langellotto. 2009. Bumble bee abundance in New York City community gardens: implications for urban agriculture. Cities and the Environment. 2(1):article 5, 12 pp. .

Werrell, P.A., G. A. Langellotto, S. U. Morath and K. C. Matteson. 2009. The Influence of Garden Size and Floral Cover on Pollen Deposition in Urban Community Gardens. Cities and the Environment. 2(1):article 6, 16 pp.

Fetridge, E., J. S. Ascher and G. A. Langellotto. 2008. The bee fauna of residential gardens in a suburb of New York City (Hymenoptera: Apoidea). Annals of the Entomological Society of America. 101: 1067-1077.

Matteson, K. C., J. S. Ascher and G. A. Langellotto. 2008. Richness and composition of the bee fauna of urban gardens in New York City (Hymenoptera: Apoidea). Annals of the Entomological Society of America. 101: 140-150.

Extension Publications: Peer Reviewed

Danler, S. and G. Langellotto-Rhodaback. 2015. Ecological Design of Urban Landscapes: Economic, Social and Ecological Benefits.  Oregon State University Extension Publication EM 9107.

Miller, W, B. Halverson and G. Langellotto. 2011. An Educator’s Guide to Vegetable Gardening. Extension Publication EM 9032.

Dreves, Amy J. and G. A. Langellotto-Rhodaback. 2011. Protecting Garden Fruits from Spotted Wing Drosophila (Drosophila suzukii). Extension Publication EM 9026-E.

Punches, John and Gail Langellotto-Rhodaback. 2010. Master Gardeners and the Creation of Extension Service Districts. Oregon State University Extension Service. 4 pages.

Industry Publications

Langellotto, G. A. 2013.  Plants for pollinators. The Digger. May issue.


Outreach and Extension

I coordinate the OSU Extension Master Gardener Program and provide support to Master Gardener Coordinators within Oregon.

My current work within extension focuses on developing solid, mutually-beneficial relationships between Oregon State University and (1) Master GardenersTM, (2) private homeowners and (3) landscape and nursery professionals within the state of Oregon.

Specifically, my work in extension recognizes that Oregon, like many other areas of the United States and the world, is becoming more urbanized. For example, the US Census Bureau estimates that the population of Oregon has increased 8.2% from 2000 to 2006. As previously rural or unmanaged lands become more developed, and as more individuals and households share land area, Oregon State University is well-situated to work with the Oregon Master GardenersTM (and other organizations and individuals) to educate the public about sustainable land management practices, and to further research on the sustainable use of private lands.


Awards and Honors

2016.  ASHS Consumer Horticutlure / Extension Master Gardener Working Group Award for Outstanding Contributions.

2014.  Achievement Award. National Association of County Agricultural Agents.

2013. OSU College of Agricultural Sciences Oldfield / Jackman Team Award (Team Drosophila members were Linda Brewer, Preston Brown, Flaxen Conway, Daniel Dalton, Joseph DeFrancesco, Amy Dreves, Dan Hilburn, Joe Kleiber, Gail Langellotto, Jana Lee, John McQueen, Betsey Miller, Jeffrey Miller, Tom Peerbolt, Peter Shearer, Bernadine Strik, Sam Tochen, Vaughn Walton, Wei Qiang Yang).

2013 (with Abha Gupta).  American Society for Horticultural Science. Outstanding Education Publication award winner for papers published in 2012.

2010.  OSU Extension Newer Faculty Award.

2009.  First place (tied). Non-credit program (online Master Gardener course), Western US Region.  University Continuing Education Association (UCEA).

2008.  Vice Provost and Associate Provost's Award for Outstanding Achievement. Online Teaching Innovation - Non-Credit Course (online Master Gardener Course).


Fun Fact

I love all insects, with the exception of tabanid flies.