Christina Grozinger, Ph.D.

Christina Grozinger, Ph.D.

  • Distinguished Professor of Entomology
  • Director, Center for Pollinator Research
W-209 Millennium Science Complex
University Park, PA 16802

Areas of Expertise

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


  • B.Sc. McGill University 1997
  • M.Sc. Harvard University 1999
  • Ph.D. Harvard University 2001

ENT 222 Honey Bees and Humans (with Harland Patch, offered every fall)
ENT 530 Colloquium in Integrative Pollinator Ecology (offered every spring)

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 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

Sponsler, D.B., Shump, D., Richardson, R., Grozinger, C.M. “Characterizing the floral resources of a North American metropolis using a honey bee foraging assay" Ecological Applications (in press).

C.M. Grozinger and A. Zayed. “Genomics for understanding and improving pollinator health in a world of multiple stressors" Nature Reviews Genetics (in press).

Douglas, M.R., Sponsler, D.B., Lonsdorf, E.V. and C.M. Grozinger. “County-level analysis reveals a rapidly shifting landscape of insecticide hazard to honey bees (Apis mellifera) on US farmland" Scientific Reports 10(1), 1-11.

Erickson, E., Adam. S., Russo, L., Wojcik, V., Patch, H.M., and C.M. Grozinger. “More than meets the eye: The role of ornamental plants in supporting pollinators" Environmental Entomology doi: 10.1093/ee/nvz133 (2019).

Villar, G., Hefetz, A., and C.M. Grozinger. "Evaluating the Effect of Honey Bee (Apis mellifera) Queen Reproductive State on Pheromone-mediated Interactions with Male Drone Bees" Journal of Chemical Ecology 45(7): 588-597 (2019).

Annoscia, D., Brown, S.P., Di Prisco, G., De Paoli, E., Del Fabbro, S.D., Frizzera, D., Zanni., V., Galbraith, D.A., Caprio, E., Grozinger, C.M., Pennachio, F. and F. Nazzi., "Haemolymph removal by Varroa mite destabilizes the dynamical interaction between immune effectors and virus in bees, as predicted by Volterra's model" Proc Roy Soc Bio 286 (1901), 20190331 (2019).

Sponsler, D.B., Grozinger, C.M., Hitaj, C., Rundlöf, M., Botías, C, Code, A., Lonsdorf, E.V., Melathopoulos, A.P., Smith, D.J., Suryanarayanan, S., Thogmartin, W.E., Williams, N.M., Zhang, M., and M. R. Douglas. Pesticides and pollinators: a socioecological synthesis. Science of the Total Environment 662: 1012-1027 (2019).

Flenniken, M.L. and C.M. Grozinger. “Bee Viruses: Ecology, Pathogenicity, and Impacts". Annual Review of Entomology 64: 205-226 (2019).

Doke, M.A., McGrady, C.M., Otieno, M., Grozinger, C.M., and M. Frazier. "Colony size, rather than geographic origin of stocks, predicts overwintering success in honey bees (Hymenoptera: Apidae) in the northeastern United States" Journal of Economic Entomology 112(2): 525-533 (2019).

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 8 (1): 8879 (2018).

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 8 (11), 5765-5776 (2018).

Holt, H.L., Villar, G. and C.M. Grozinger. "Molecular, physiological and behavioral responses of honey bee (Apis mellifera) drones to infection with microsporidian parasites" Journal of Invertebrate Pathology 155, 14-24 (2018).

Mu, J., Wu, Q., Yang, Y., Huang, M. and C. M. Grozinger. “Plant reproductive strategies vary under low and high pollinator densities" Oikos 127: 1081-1094, 10.1111/oik.04711 (2018).

Villar, G., Wolfson, M.D., Hefetz, A.H. and C.M. Grozinger. “Evaluating the role of drone-produced chemical signals in mediating social interactions in honey bees (Apis mellifera)" J Chemical Ecology 44(1): 1-8 (2018).

Levin, S., Galbraith, D., Sela, N., Erez, T., Grozinger, C.M., and N. Chejanovsky. “Presence of Apis rhabdovirus-1 in populations of pollinators and their parasites from two continents" Frontiers in Microbiology 8:2482 (2017)

Annoscia, D., Zanni., V., Galbraith, D., Quirici, A., Grozinger, C., Bortolomeazzi, R., Nazzi, F. “Elucidating the mechanisms underlying the beneficial health effects of dietary pollen on honey bees (Apis mellifera) infested by Varroa mite ectoparasites." Scientific Reports 7: 6258(2017).

Amsalem, E.*, Padilla, M.*, Schreiber, P.M. #, Altman, N., Hefetz, A., and C.M. Grozinger. "Do bumble bee (Bombus impatiens) queens signal their reproductive and mating status to their workers?" Journal of Chemical Ecology 43(6): 563-572 (2017), * indicates equal contribution, # denotes undergraduate researcher

Zanni., V., Galbraith, D., Annoscia, D., Grozinger, C.M., Nazzi, F. “Transcriptional signatures of parasitization and markers of colony decline in Varroa-infested honey bees (Apis mellifera)." Insect Biochemistry and Molecular Biology 87: 1-13. (2017)

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., Stabler D., Patch, H.M., Tooker, J.F., Grozinger, C.M., Wright, G.A. "Bumble bees regulate their intake of the essential protein and lipid pollen macronutrients" Journal of Experimental Biology 219: 3962-3970 (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 3(10): 160576 (2016). * indicates equal contribution.

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).

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).