Christina Grozinger, Ph.D.

  • Distinguished Professor of Entomology
  • Director, Center for Pollinator Research
Christina Grozinger, Ph.D.
W-209 Millennium Science Complex
University Park, PA 16802
Work Phone: 814-865-2214

Areas of Expertise

  • Pollinators
  • Honey Bees
  • Social Insects
  • Genomics
  • Immunity
  • Behavior
  • Physiology


  1. B.Sc. McGill University 1997
  2. M.Sc. Harvard University 1999
  3. Ph.D. Harvard University 2001


The Grozinger Lab
Center for Pollinator Research
Google Scholar

Penn State Center and Program Affiliations

Intercollege Graduate Degree Program in Ecology
Intercollege Graduate Degree Program in Molecular, Cellular, and Integrative Biosciences
Center for Pollinator Research
Center for Chemical Ecology
Center for Brain, Behavior and Cognition
Center for Infectious Disease Dynamics

Current Graduate Students:

  • Makaylee Crone (NSF Graduate Research Fellow, Bunton Waller Fellow, Ecology Program, co-advised with David Biddinger)
  • Rachel McLaughlin (Integrative Pollinator Ecology Fellow, Entomology Program, co-advised with Kelli Hoover)
  • Allyson Ray (Molecular, Cellular, and Integrative Biosciences Program, co-advised with Jason Rasgon)
  • Emily Erickson (Entomology Program)
  • Tyler Jones (Bunton Waller Graduate Fellow, Entomology Program)
  • Melanie Kammerer Allen (USDA Predoctoral Fellow, Ecology Program, co-advised with John Tooker)

Postdoctoral Scholars:

  • Martina Calovi (co-advised with Guido Cervone and Doug Miller)
  • Rong Ma
  • Doug Sponsler
  • Colin Wright (Eberly Research Fellow, co-advised with Heather Hines)


  • Kate Anton

Research Interests :

Social insects, pollinator health, behavioral genomics, neuroethology, chemical ecology, disease ecology

Grozinger CV


ENT 222 Honey Bees and Humans (with Harland Patch, offered every fall)
ENT 522 Critical Thinking and Professional Development (with Harland Patch and Jason Rasgon, offered every spring)
ENT 530 Colloquium in Integrative Pollinator Ecology (offered every spring)
AEE 597 NSF-GRFP Fellowship Preparation (team taught, offered every fall)
ECLGY 515 Advances in Ecology (team taught, offered every fall)

Research Activities & Interests:

Bees are critical pollinators in natural and agricultural landscapes, and key model systems for the study of social behavior.  My program seamlessly integrates research, education and outreach related to the biology, health and conservation of pollinators, particularly honey bees and bumble bees.  My research uses integrative approach encompassing genomics, physiology, behavior, chemical ecology, and ecology.  Our studies test and elaborate fundamental principles in animal behavior, evolutionary biology, disease ecology, and more recently landscape ecology.  These studies have led to multiple new avenues of inquiry, and provided critical knowledge that can be deployed to improve conservation of pollinators and their ecosystem services.  

Selected Publications:

Flenniken, M.L. and C.M. Grozinger. “Bee Viruses: Ecology, Pathogenicity, and Impacts”.  Annual Review of Entomology (in press).

Galbraith, D. A., Z. L. Fuller, A. Brockman, M. Frazier, M. W. Gikungu, K. M. Kapheim, J. T. Kerby, S. D. Kocher, O. Losyev, E. Muli, H. M. Patch, J. M. Sakamoto, S. Stanley, A. D. Vaudo and C. M. Grozinger. "Investigating the viral ecology of global bee communities with high-throughput metagenomics" Scientific Reports 2018 Article #8879.

Vaudo, A.D., Farrell, L.M., Patch, H.M., Grozinger, C.M. and J.F. Tooker. “Consistent pollen nutritional intake drives bumble bee (Bombus impatiens) colony growth and reproduction across different habitats” Ecology and Evolution (2018),

Villar, G. and C. M. Grozinger. "Primer Effects of the Honey Bee Queen Pheromone 9-ODA on Drones (Apis mellifera)" Animal Behavior 127: 271-279 (2017).

Doublet, V.*, Poeschl, Y.*, Gogol-Döring, A., Alaux, C., Annoscia, D., Aurori, C., Barribeau, S.M., Bedoya-Reina, O., Brown, M.J.F., Bull, J.C., Flenniken, M.L., Galbraith, D.A., Genersch, E., Gisder, S., Grosse, I., Holt, H.L., Hultmark, D., Lattorff, H.M.G., Le Conte, Y., Manfredini, F., McMahon, D.P., Moritz, R.F.A., Nazzi, F., Niño, E.L., Nowak, K., van Rij, R.P., Paxton, R.J.*, and C. M. Grozinger*. "Unity in defence: honeybee workers exhibit conserved molecular responses to diverse pathogens" BMC Genomics 18(1): 207 (2017). *indicates co-first authors and co-senior authors.

Vaudo, A.D., Patch, H.M., Mortensen, D.A., Tooker, J.F., and C.M. Grozinger. "Macronutrient ratios in pollen shape bumble bee (Bombus impatiens) foraging strategies and floral preferences." Proceedings of the National Academy of Sciences 113(28): E4035–E4042 (2016).

Galbraith, D.A., Kocher, S.D., Glenn, T., Albert, I., Hunt, G.J., Strassmann, J.E., Queller, D.C., and C.M. Grozinger. "Testing the kinship theory of intragenomic conflict in honey bees (Apis mellifera)." Proceedings of the National Academy of Sciences 113(4):1020-1025 (2016).

Padilla, M.*, Amsalem, E.*, Altman, N., Hefetz, A., and C.M. Grozinger. "Chemical communication is not sufficient to explain reproductive inhibition in the bumble bee Bombus impatiens" Royal Society Open Science (in press), * indicates equal contribution.

Holt, H.L, and C.M. Grozinger. "Towards an Integrated Pest Management (IPM) approach for Nosema (Microsporidia: Nosematidae) parasites in honey bee (Hymenoptera: Apidae) colonies" Journal of Economic Entomology 109(4): 1487-1503 (2016).

Amsalem, E., Galbraith, D., Cnaani, J., Teal, P. and C.M. Grozinger. "Conservation and modification of genetic and physiological toolkits underpinning diapause in bumble bee queens" Molecular Ecology 24(22): 5596-5615 (2015).

Galbraith, G.A.*, Yang. X.*, Nino, E.L., Yi, S., and C. M. Grozinger. "Parallel epigenetic and transcriptomic responses to viral infection in honey bees (Apis mellifera)". PLoS Pathogens 11(3):e1004713 (2015).

Vaudo, A. D, Tooker, J.F., Grozinger, C.M. and H.M. Patch. "Bee nutrition and floral resource restoration." Current Opinion in Insect Science 10:133-141 (2015).

Doke, M.A., Frazier, M. and C.M. Grozinger. "Overwintering Honey Bees: Biology and Management" Current Opinion in Insect Science 10: 185-193 (2015).

Grozinger, C.M. and G. E. Robinson. "The power and promise of applying genomics to honey bee health". Current Opinion in Insect Science 10: 124-132 (2015).

Schmehl, D. R., Teal, P.E.A., Frazier, J.F. and C. M. Grozinger. "Genomic analysis of the interaction between pesticide exposure and nutrition in honey bees (Apis mellifera)". Journal of Insect Physiology 71: 177-190 (2014).

Muli*, E., Patch*, H.M., Frazier*, M., Frazier, J., Torto, B., Baumgarten, T., Kilonzo, J., Kilmani, J., Mumoki, F., Masiga, D., Tumlinson, J., and C.M. Grozinger. "Evaluation of distribution and impacts of parasites, pathogens, and pesticides on honey bee (Apis mellifera) populations in East Africa" PLoS ONE 9(4): e94459 (2014).

Holt, H.L., Aronstein, K. and C.M. Grozinger. “Chronic parasitization by the microsporidian Nosema causes global expression changes in core nutritional, metabolic, and behavioral pathways in honey bee workers (Apis mellifera)” BMC Genomics 14: 799 (2013).  

Niño, E.L., Malka, O., Hefetz, A. Tarpy, D.R., and C.M. Grozinger.  Chemical profiles of two pheromone glands are differentially regulated by distinct mating factors in honey bee queens (Apis mellifera L.)" PLoS ONE 8(11): e78637 (2013).

Richard, F.J., Holt, H.L., and C.M. Grozinger. “Effects of immunostimulation on genome-wide gene expression, chemical communication and social behavior in honey bee workers (Apis mellifera)” BMC Genomics 3:558, 17p (2012).

Fischer, P. and C.M. Grozinger. “Pheromonal regulation of starvation resistance in honey bee workers” Naturwissenschaften 95(8):723-729  (2008).

Grozinger, C.M., Fan, Y., Hoover, S.E.R.  and M.L. Winston. “Genome-wide analysis reveals differences in brain gene expression patterns associated with caste and reproductive status in honey bees (Apis mellifera)” Molecular Ecology 16(22):4837-4848 (2007).

Grozinger, C. M., Sharabash, N. M., Whitfield, C. W. and Robinson, G. E. “Pheromone mediated gene expression in the honey bee brain.” Proc Natl Acad Sci U S A 100(Suppl 2):14519-14525 (2003).

Research Interests

Chemical Ecology
Pollinator Biology, Health and Ecology

Social insects, behavioral genomics, neuroethology, chemical ecology

Honey Bee and Pollinator Research

Dr. Grozinger's research group uses genomic approaches to study the biology of honey bees, their pests and pathogens and other social insect species.  Ongoing projects include characterizing the genes and molecular mechanisms involved in pheromone communication, reproduction, and response to immunostimulation in honey bees.  We are developing genomic resources for Varroa mites, a serious pest of honey bees, fire ants, and the paper wasp Polistes dominulus, both excellent models for study the evolution of social behavior.

Evolutionary Biology