Christopher John Shogren

Environmental Horticulture Advisor

Ph.D. Entomology, The University of California, Riverside. 2017
B.S. Environmental Horticulture, California Polytechnic State University, San Luis Obispo. 2010
B.S. Agricultural Business, California Polytechnic State University, San Luis Obispo. 2010
Horticulture, nursery crops, pest management, exotic and invasive pests

Dr. Christopher Shogren is an environmental horticulture advisor for UC Cooperative Extension in Los Angeles and Orange Counties. As an advisor, he provides expertise in pest management of ornamental plants and water use issues (affecting the development and maintenance of the urban forest). In addition to providing education to various clientele groups, Dr. Shogren conducts applied research to maximize human health benefits related to horticulture. He has authored several peer-reviewed journal articles. 

Dr. Shogren grew up in the horticulture industry, working at his parents' wholesale nursery in Southern California. His undergraduate studies focused on plant production at the California Polytechnic State University in San Luis Obispo, where he received degrees in environmental horticulture and agricultural business. He then went on to receive his doctorate in entomology from the University of California, Riverside, where his research focused on integrated pest management of invasive thrips. 

Dr. Shogren's current research is on management of insects, diseases and weeds in horticulture production systems, and the urban forest. Other research interests include biological control of exotic pests and increasing water-use efficiencies in landscapes, nurseries, golf courses and municipalities. 

Peer reviewed

  • Bustamante, Marcelo; Elfar, Karina; Carachure, Carlos; Adaskaveg, Adam; Kabashima, John; Shogren, Chris; Eskalen, Akif; Lynch, Shannon (2024). Etiology of Pine Ghost Canker in Southern California Urban Forests. Plant Disease. November 2024. https://doi.org/10.1094/PDIS-08-24-1718-SR
  • Bustamante, M.; Lynch, S.; Elfar, K.; Kabashima, J.; Wood, R.; Neault, H.; Rauhe, M.; Crain, J.; Lopez, J.; Penicks, A.; Mojica, B.; Atkinson, M.; Shogren, C.; Arreguin, M.; Chiang, C.; Wells, S.; Alarcon, K.; Eskalen, A. (2023). First Report of Neofusicoccum mediterraneum and Neofusicoccum parvum Causing Pine Ghost Canker on Pinus spp. in Southern California. Plant Disease. https://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-09-22-2076-PDN
  • Shogren, Chris; Paine, T.D. (2020). Predicting the Potential Invasive Range of Klambothrips myopori (Thysanopetra: Phlaeothripidae). Journal of Economic Entomology. 113:3, 1202-1210.
  • Shogren, Chris; Paine, T.D. (2019). Host Plant Recognition and Performance of Klambothrips myopori (Thysanoptera: Phlaeothripidae) Across Myoporum Cultivars in Southern California. Journal of Economic Entomology. 112:4, 1645-1650.
  • Shogren, Chris; Paine, T.D. (2019). Identification of Klambothrips myopori Predator Complex in California. Journal of Environmental Entomology. 48:4, 1024-1034.
  • Shogren, Chris; Paine, T.D. (2016). Economic Benefit for Cuban Laurel Thrips Biological Control. Journal of Economic Entomology. 109:1, 93-99.

Non-peer reviewed

  • Spinelli, Gerry; Shogren, Chris; Criscione, Kristopher (2026). Greenhouse Evapotranspiration. UCNFA Summer Newsletter 2026. https://ucnfa.ucdavis.edu/news/greenhouse-evapotranspiration
  • Godfrey, Jessie; Shogren, Chris (2026). What California Can Learn About Developing and Implementing Tree Quality Standards. UCNFA Summer Newsletter 2026. https://ucnfa.ucdavis.edu/news/lessons-florida
  • Shogren, Chris (2025). New Beetle Pest on Southern California Eucalyptus. Green Bulletin. Windbiel-Rojas, Karey; Messenger-Sikes, Belinda. UC IPM. 15:2, 1-3. https://ipm.ucanr.edu/legacy_assets/PDF/PUBS/green.bulletin.summer.2025.pdf
  • Godfrey, Jessie; Shogren, Chris (2025). Perspectives from the California Nursery Industry on State-Specific Tree Quality Standards or Certification. UCNFA Summer Newsletter. August 2025. https://ucnfa.ucdavis.edu/news/perspectives-california-nursery-industry-state-specific-tree-quality-standards-or
  • Shogren, Chris (2025). The Dotted Paropsine Leaf Beetle Threatens California's Eucalyptus. UC IPM Home & Garden Pest Newsletter. Windbiel-Rojas, Karey; Messenger-Sikes, Belinda. 05:2, 3-4. May 2025. https://ipm.ucanr.edu/legacy_assets/PDF/PUBS/may_2025-home-garden-pest-newsletter.pdf
  • Shogren, Chris (2025). The Dotted Paropsine Leaf Beetle Threatens California’s Eucalyptus. UCNFA Spring Newsletter. https://ucnfa.ucdavis.edu/news/dotted-paropsine-leaf-beetle-threatens-californias-eucalyptus
  • Hodel, Don; Santos, Paul; Rothschild, Max; Chinchilla-Vargas, Josue; Ohara, Linda; Arakelian, Gevork (2024). A Preliminary Investigation of the New and Serious Malady of Schinus molle Canopy Thinning. Part 2. PalmArbor. 04, 1-32. June 2024. https://ucanr.edu/sites/HodelPalmsTrees/files/398680.pdf
  • Spinelli, Gerry; Shogren, Chris (2024). A Simple Equation To Estimate Runoff In Sprinkler-Irrigated Container Nurseries. San Diego Cooperative Extension Summer Newsletter. July 2024. https://cesandiego.ucanr.edu/newsletters/Extension_Connection_Newsletter101988.pdf
  • Spinelli, Gerry; Shogren, Chris (2024). Denitrifying Woodchip Bioreactors. San Diego Cooperative Extension Summer Newsletter. April 2024. https://cesandiego.ucanr.edu/newsletters/Extension_Connection_Newsletter101044.pdf
  • Shogren, Chris (2024). Emerging Pests and Pathogens. Western Region International Plant Propagators Society 2024 Meeting Proceedings. October 2024.
  • Shogren, Chris; Rauhe, Madeleine; Kabashima, John; Eskalen, Akif; Lynch, Shannon (2024). Ficus Dieback. August 2024. https://ucanr.edu/sites/eskalenlab/files/401904.pdf
  • Shogren, Chris: Nobua-Behrmann (2024). Invasive Shothole Borers: Understanding and Managing the Threat. UCNFA Fall Newsletter 2024. November 2024. https://ucnfa.ucdavis.edu/news/invasive-shothole-borers-understanding-and-managing-threat
  • Bustamante, Marcelo; Elfar, Karina; Kabashima, John; Shogren, Chris; Eskalen, Akif; Lynch, Shannon (2024). Pine Ghost Canker in Southern California. November 2024. https://ucanr.edu/sites/eskalenlab/files/403623.pdf
  • Spinelli, Gerry; Shogren, Chris (2024). Pressure Compensating Emitters Increase Distribution Uniformity of Spray-stakes But May Be Cost Prohibitive for Nursery Production. Nursery Management. November 2024.
  • Spinelli, Gerry; Shogren, Chris (2024). Spray-stakes with Pressure-Compensating Emitters for Nursery Production: Cost and Water Savings. San Diego Cooperative Extension Newsletter. October 2024.
  • Hodel, Donald R.; Loucks, Ross; Rothschild, Max F.; Chinchilla-Vargas, Josue; Ohara, Linda M.; Santos, Paul; Shogren, Chris; Merhaut, Donald J.; Slack, Nathan; Parkins, Kelly; Rangel, Tony (2023). Chlorophyll Photobleaching: An Occasionally Severe Disorder of Ficus benjamina in Southern California. PalmArbor. 17, 1-29. October 2023.
  • Spinelli, Gerry; Shogren, Chris (2023). How to Estimate Whether You Are Over-Irrigating in Nurseries: a Quick-and-Dirty Method. San Diego Cooperative Extension Newsletter. November 2023.
  • Spinelli, Gerry; Shogren, Chris (2023). Why it is not as simple as changing the nozzles A common mistake with sprinkler irrigation in container nurseries. San Diego Grown Magazine. September 2023.