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S. Patricia Stock Lab

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Member Profiles


Lab Members: Principal Investigator

S. Patricia Stock

Associate Professor, Department of Entomology
Adjunct Assistant Professor, Department of Plant Sciences, Division of Plant Pathology

1992: Ph.D. Natural Sciences (Parasitology), National University of La Plata, Argentina
1985: B.S. Zoology, University of La Plata, Argentina

My current research interests are: insect pathogens, with special interest on insect parasitic and pathogenic nematodes and their bacterial symbionts. I am interested in studying the biodiversity of nematodes and their role in ecosystem function. I am actively engaged in survey and inventory projects in different geographic regions of the world, which allow me to make significant contributions toward biological conservation and restoration efforts. These projects require continued research into improving molecular techniques by which nematode species are recovered. Additionally, I'm interested in studying the ecology and genetics of nematode populations from agricultural and natural ecosystems. I also have an active research program on insect pathology and the use of entomopathogenic nematodes as biological control agents. The overall objectives of this program are to develop entomopathogens as effective biocontrol agents against major agricultural pests, and to develop a basic understanding of the ecology and behavior of insect parasitic nematodes. One of our ongoing research projects focuses on a tripartite system comprised by: 1) insects, 2) entomopathogenic nematodes and 3) symbiotic bacteria to explore how the physiological condition of one of the three partners – the host insect – affects the system as a whole.

A newly developed research area in my research program deals with nematode-bacterium symbioses. Nematode-bacteria symbiotic partnerships are excellent model-systems to understand fundamental processes underlying the inter-dependency of nematodes and bacteria and also for studying other eukaryote-prokaryote symbioses.

See Department of Entomology profile
Download Curriculum Vitae (pdf)


Lab Members: Post-doctoral Associate

Will Soto

William Soto

Will obtained his PhD in Ecology and Evolution in 2009 from New Mexico State University. His research focused on Microbial Experimental Evolution in the Bobtail Squid-Vibrio Symbiosis. He is currently investigating Steinernema-Xenorhabdus entomopathogenic complex as a model system for studying microbial symbiont evolutionary responses to temperature stress.




Lab Members: Research Associate

Ming Lee

Ming Lee

Ming plays a key role in the lab as she assists with the training of graduate and undergraduate students. Her research focuses on evolution and molecular biology of entomopathogenic nematodes.




Lab Members: Graduate Students

Victoria Miranda

Victoria Miranda obtained her B.S. from Cornell University in 2006, where she studied entomology and focused on biological control of insect pests such as the gypsy moth and Asian longhorned beetle. She is currently a first-year masters student pursuing a project that investigates the fitness cost of entomopathogens in relation to host diet. She is also interested in integrating K-12 science education and research-based science.


Patricia Navarro

Patricia received her bachelor degree in Agronomic Engineering in the Universidad Austral of Chile, and a Master degree in Crop Protection (Major: Entomology) from University of Puerto Rico at Mayaguez). Her masters research focused on biological control of the coffee leaf miner (Leucoptera coffeella) with the Braconidae Mirax insularis. She is currently investigating multitrophic interaction between “plant-insect-entomopathogenic nematodes-soil-borne microbes.


Rousel Orozco

Rousel’s research focuses on the molecular and phenotypic characterization of the bacterial symbionts of entomopathogenic nematodes. He is also interested in the characterization of secondary metabolites and antimicrobial compounds produced by P. luminescens, subsp. sonorensis and their potential use as pharmaceuticals.


Noha Abu-Shadi

Noha Abu Shady is a visiting scholar from Egypt. She received her MS degree from the Faculty of Agriculture, Cairo University. She studied entomopathogenic nematodes for application in biological control programs for insects pests of Egypt. Noha is currently pursuing a PhD degree, her current research interest is on the molecular and morphological identification of entomopathogenic nematodes from Egypt. Noha is sponsored by the Egyptian government for two years to work on her PhD.


Mary Lamoreaux

Mary is a biology teacher at Sahuarita High School. She is currently pursuing a masters degree in Education. Her research focus is the assessment of entomopathogenic nematodes and chemical pesticides on local agricultural pests.




Lab Members: Undergraduate Students and Trainees


Jesse Caballero

Jesse Caballero

Jesse is an undergraduate in the Biochemistry and Biophysics Department. He is currently doing his Honors College thesis in the lab. He is investigating the chemical nature of antagonism between plant pathogens and entomopathogenic nematodes.


Valerie Lucero

Valerie Lucero

Valerie is an undergraduate student in the Department of Molecular and Cellular Biology, with a minor in Religious Studies and Business. She is interested in medical and pharmacy school once she graduates, and the possibility of pursing research in those fields. She is currently in Dr. Stock’s lab researching the relation between nematodes and their symbionts for her Honor’s thesis.


Jacob Fijal

Jacob Fijal

Jacob is currently an undergraduate student in the Molecular and Cellular Biology Department. He is also a UBRP student doing research in the lab. His interest is on Steinernema nematodes-Xenorhabdus symbiont mutualism.


John McMullen

John McMullen

John is an undergraduate student in the Department of Microbiology. He is interested in environmental microbiology research, specifically the microbial interactions with plants and insects. He is also hoping to double major in Biochemistry to learn more about the processes of life. His career goals are to go into environmental microbiological research as a research scientist. As a freshman here at the UA, he is excited to start his higher education.


Diana Stan

Diana Stan

Diana is an undergraduate student expecting to graduate in fall 2010 with a bachelor’s degree in Physiological Sciences. After graduating she plans on attending graduate school and receiving a masters in physician assistant studies. Her motivation behind wanting to get started in the laboratory was taking one of Dr. Stock's classes, ENTO 310 at the University of Arizona.


Bei Xiong

Bei Xiong

Bei Xiong is her fourth year at the University of Arizona majoring in physiology. Sheis currently conducting a research on the fitness parameters of Steinernema nematodes and their interaction with different Xenorhabus bacteria. I plan to go to medical school after finishing my bachelor degree.


Alan Underwood

Alan Underwood

Alan completed his B.S. in Molecular and Cellular Biology in 2008 and he is returning to U. Arizona to pursue a degree in Biochemistry. His ultimate goal is to attend Medical School where he intens to focus in either Emergency Medicine or Dermatology. He became interested in Nematodes while taking Dr. Stock's "Living in Symbiosis" class roughly 2 years ago.



Lab Members: High School Students and Teacher Interns

Robert Lopez

Robert Lopez

Robert is a senior at San Miguel High School. He is currently collaborating in various projects, including the molecular characterization of nematode associates of the European red ant Myrmica rubra.

Watch research video on: http://uanews.org/node/29619



Past Lab Members: Post-Doctoral Associates

Herbert Talwana

Herbert Talwana, 2009-2010

Fulbright Fellow, Department of Crop Science, Faculty of Agriculture, Makerere University Kampala, Uganda. Herbert is currently a Lecturerin the Department of Crop Science at Makerere University.




Past Lab Members: Graduate Students

Joanna Gress

Joanna Gress

Joanna received her Masters degree (non-thesis) in Plant Sciences in August 2007. Joanna joined the Stock lab in the Fall of 2004. While she was a member of the lab she conducted research on biocontrol of the citrus nematode. This research was funded by the W-SARE program, ARCS foundation and the Arizona Citrus Research Council.


Benjamin Rivera

Benjamin Rivera-Orduño

Benjamin obtained a Masters degree from Universidad de Sonora, Mexico. Benjamin conducted research dealing with the implementation of biological control agents (mostly fungi and nematodes) to control cicadas and plant pathogens in asparagus fields in the state of Sonora. He is currently a farm advisor and also a Lecturer at this university.




Past Lab Members: Undergraduate Students and Trainees

Eleni Constantopoulos

Eleni Constantopoulos

Eleni assisted in the lab with the rearing and maintenance of M. sexta colonies. She is an undergraduate student at University of Arizona and is currently pursuing a degree in Physiology.


Rousel Ourozco

Rousel Orozco

Rousel graduated summer 2010 from University of Arizona, Department of Molecular and Cellular Biology. He is currently a grad student in the lab (see above).


Matt Lopez

Matthew Lopez

Matt was a Pima Community College Summer intern during 2009.


Karri Hobaica

Karri Hobaica

Karri graduated last summer 2010. She is currently pursuing a degree in biomedical biology in New Orleans.


Brody Holohan

Brody Holohan

Brody graduated spring semester 2009. He is currently pursuing a PhD degree at University of Texas. Watch research video on: http://www.youtube.com/watch?v=-eC46pniojk


Hyunbae Cho

Hyunbae Cho

Hyunbae graduated Spring ’09. Hyunbae is currently pursuing a DDS at New York University.


Sara Pierce

Sara Pierce

Sarah obtained a bachelors degree from Veterinary Sciences and Microbiology. She graduated Spring 09.


Katherine Beckwith

Katherine Beckwith

Katherine graduated summer 2009 from University of Arizona. She is currently a high school teacher and continues her connection to the lab during her summers through the Biology for Teacher program.


Chan Maketon

Chan Maketon

Chan graduated in 2008 with a Bachelors degree in Plant Sciences. He is currently a grad student at Washington State University pursuing a MS in Plant pathology.


Kate Plichta

Kate Plichta

Kathryn is an undergraduate majoring in Environmental Science with a focus in Biology. Kathryn was in the Undergraduate Biology Research Program (UBRP) and her main research in the lab focused on the Steinernema-Xenorhabdus symbiosis.


Roy Yim

Roy Yim

Roy is a first generation Korean-American student he obtained a Bachelors degree in Ecology and Evolutionary Biology with a minor in General Business Administration. While at the Stock lab he assisted with various research projects in the laboratory including molecular diagnostics of entomopathogenic nematodes. Past projects that he worked, focus on the evaluation of Arizona-native EPNs for the control of lepidopetran pests in lettuce crops.


Luis Lozano

Luis Lozano

Luis joined the Stock lab in the Fall of 2006. He is pursuing a Bachelors degree in Molecular and Cellular Biology. He assisted with experiments dealing with the ecological characterization of Arizona-native entomopathogenic nematodes.


Jaika Ohja

Jaika Ohja

Jaika is from Nepal and is currently pursuing a Bachelors degree in Microbiology. She graduated in the Spring 2007. She assisted with experiments dealing with the ecological characterization of Colombia-native Steinernema species.


Brittany Tamarkin

Brittany Tamarkin

Brittany was a Summer-Intern Student from the Pima Community College, Tucson Arizona.  She is pursuing a degree in Biotechnology.  Brittany’s research focused on the molecular characterization of EPN from South Africa.


Pavla Senkyrikova

Pavla Senkyrikova

Pavla graduated in the summer ’06 with a Bachelors degree in Mathematics at the University of Arizona.  Pavla worked in the lab for three years conducting several research projects involving essays with EPN. She is currently attending Dental School at University of California San Francisco.


Eun Hee Kwon

Eun Hee Kwon

Eunhee graduated in the summer ’06 with a Bachelors degree in Molecular and Cellular Biology at the University of Arizona.  Eun Hee worked in the lab for almost 2 years conducting various projects as part of her independent study training.  She is currently working at the Cancer Center at the University of Arizona.


Shaun Peterson

Shaun Peterson

Shaun spent last winter ’06 as a Winter-term Fellow in the lab.  Shaun Graduated from the Marian College, Font du Lac, WI, with a Bachelors degree in Nursing.  Shaun conducted research dealing with the ecological characterization of Steinernema isolates from Wisconsin. Shaun is currently working for a biotech company in Wisconsin.





Other former students

  • Alicia Serpa, Department of Microbiology, Summer 2010
  • Nghia Lai, Department of Physiology, Spring 2010
  • Andrew Wang, Department of Molecular and Cellular Biology, Spring 2009
  • Shaun Peterson, Marian College, Font du Lac, WI. Spring 2006
  • Amber Lorge, Marian College, Font du Lac, WI. Spring 2005
  • Randolph Seligmann, Department Chemistry, Summer 2004
  • Jessica Sparling, Department Anthropology, 2003-2005
  • Jimmy Buckner, Department of Astronomy, 2001-2002
  • Luke Grossmiller, Department of Astronomy, 2001-2002
  • Jennifer Siegfried, Art Department, 2001-2002


Past High School Students and Teachers Interns

Belinda Gonzalez

Belinda Gonzalez

Sierra Vista High School. KEYS (Keeping Early Youth in Science) Program, Summer 2010


Janet Slingerland

Janet Slingerland

Biology Teacher, Flowing wells Middle School, AZ STAR Biology for Teachers Summer Internship, Summer 2009; NSF-RET (Research experience for Teachers), Summer 2010.


Rebecca Hildreth

Rebecca Hildreth

Salt Point High School. KEYS (Keeping early Youth in Science) Program, Summer 2009.


Caroline Krater

Caroline Krater

Biology Teacher, Canyon del Oro High School. RET-NSF program and AZ STAR Biology for Teachers Summer Internship. Summer 2009.


Shinglu Shi

Shinglu Shi

Catalina Foothills High School. KEYS (Keeping early Youth in Science) Program, Summer 2008.


John Sagun

John Sagun

Biology Teacher, Window Rock High School, Navajo Reservation, AZ STAR Biology for Teachers Summer Internship. Summer, 2008.




Visiting Scientists/Scholars

  • Dr. Silvia Bulgheresi, Assistant Professor, University of Vienna, Austria (2010)
  • Francisco Sotelo, Instructor, Universidad Autónoma de Morelos Cuernavaca, México (2009)
  • Sergio Rodriguez Sedano, Graduate Student, Universidad de Guadalajara, Mexico (2009)
  • Mariana Orozco, Graduate Student, Universidad de Guadalajara, Mexico (2009)
  • Yolanda Reyes Vidal, Graduate Student, CIAD, Hermosillo, Mexico (2009)
  • Patricia Florez-Quiroz, Research Leader, BioAGRo, Santiago, Chile (2009, 2010)
  • Tshimangadzo Ramakuwela, Graduate Student, ARC-LNR, Bethlehem, South Africa (2008)
  • Sonay Aydin, Graduate Student, Adnan Menderes University, Turkey (2007)
  • Octavio Zegarra-Aliaga, Research Scientist, Internacional Potato Center (CIP), Peru (2007)
  • Enrique Castiglioni, Profesor, Facultad de Agronomía, EEMAC, Paysandú, Uruguay (2007)
  • Ahmad Mahasneh, Graduate Student, University of Jordan, (2006)
  • Juan Carlos Lopez-Nuñez, Research Scientist, Cenicafe, Colombia (2004, 2006)
  • Judith Hueso-Guerrero, Graduate Student, Universidad de Colima, Mexico (2005)
  • Dr. Ho Yul Choo, Professor, National University of Gyeongnam, South Korea (2004)
  • Miguel Najera-Rincón, Research Scientist, CENAPROS, INIFAP, Michoacán, Mexico (2003)



Dr. S. Patricia Stock
Associate Professor / Adjunct Professor
Department of Entomology / Plant Sciences
University of Arizona
Forbes Bldg. Rm 410
1140 E. South Campus Dr.
Tucson, AZ 85721-0036
Voice: (520) 626-3854
Lab: (520) 621-1317
Fax: (520) 621-1150
e-mail: spstock@ag.arizona.edu