Cassandra L. Swett

Cooperative Extension Specialist-Vegetable and Field Crop Pathology
Department of Plant Pathology
University of California, Davis
Phone: 530-742-3377



Ph.D., Plant Pathology, University of California, Davis
M.S., Tropical Plant Pathology, University of Hawaii, Manoa
B.S., Plant Science (Philosophy minor), University of California, Santa Cruz

Overall areas of interest: Ecosphysiological interactions of fungal symbionts with plant hosts across the endophyte-pathogen continuum; overcoming pathogen-related barriers limiting adaption to increased scarcity of high quality water; Fusarium ecology.

Johanna Del Castillo-Munera

Postdoctoral Research Scientist
Department of Plant Pathology
University of California, Davis
Email: TBD





Ph.D., Plant Pathology, Michigan State University
M.S., Biological Sciences, Universidad de los Andes, Bogotá, Colombia
B.S., Microbiology, Universidad de los Andes, Bogotá, Colombia

Areas of interest: Population genetics, microbial ecology, and characterization of fungal and oomycete plant pathogens, to develop sustainable solutions for disease control and better tailor management strategies for greenhouses and nurseries. Extension plant pathology, to transmit our research to growers.

As a post-doc, my research focuses on adapting use of deficit irrigation to mitigate risk and perhaps co-manage root and crown rot diseases caused by oomycetes.  I am very excited to extend this research to  California, evaluating the implementation of irrigation strategies to reduce water usage on vegetable crops.

Elizabeth (Beth) Hellman

Junior research specialist
Department of Plant Pathology
University of California, Davis




B.S., Biochemistry, University of Maryland, College Park

Areas of interest: Fungal ecology, fungal-plant interactions, plant pathogens, water resource management, sustainable agriculture, scientific outreach.

I am very interested in researching natural systems and learning about how relationships between fungi and plants modify as they adapt to changes in their environments, especially with the added perspective of our changing climate.

Justine Beaulieu

Faculty Assistant
Department of Plant Sciences and Landscape Architecture
University of Maryland, College Park

M.S., Plant Sciences, University of Maryland, College Park
B.S., Environmental Science and Policy (Environment and Agriculture), University of Maryland, College Park

Areas of interest: Phytophthora disease and management, food safety and security, sustainable management of plant pathogens, and producer training and education.

I am the Maryland contingent of the Swett Lab. I am working with nursery and greenhouse operations in the state, focusing on sustainable plant disease management strategies, specifically those that increase water use efficiency.

Current undergraduate students

Andrea Paulk

Erin Helpio

Nyny Vu