Ernesto Guzman

Professor and Head of the Honey Bee Research Centre
Phone number: 
(519) 824-4120 Ext.53609 Room: ECBL 3241
Edmund C Bovey


DVM, Universidad Nacional Autónoma de México (UNAM)

MSc (Entomology), University of California, Davis

PhD (Entomology), University of California, Davis

Students Advised:
Dr Guzman has advised or co-advised the theses of more than 40 DVM, MSc and PhD students


Research in Dr Guzman's lab is focused on three main areas: genetics, behaviour and parasitic mites of honey bees. These studies have contributed to the understanding of foraging behaviour, defensive behaviour and the mechanisms that provide honey bees resistance against parasitic mites, which is the most serious problem facing beekeepers worldwide. Currently, postdoctoral fellows, students and technicians in Dr Guzman's lab are investigating the effect of parasites and pesticides on the behaviour and immune responses of honey bees.

Meet Prof. Ernesto Guzman

Head shot of Ernesto with a play button overlaid.

Ernesto Guzman is a professor in our School of Environmental Sciences and the Pinchin Family Chair in Honey Bee Health. His research focuses on identifying factors that affect honey bee health and behaviour.

Check out Ernesto's 60 second snapshot video here.


Selected Recent Publications

Ernesto Guzman is author and co-author of more than 250 publications including scientific and trade journal articles, as well as books, book chapters and summaries in conference proceedings.

Hamiduzzaman M.M., A. Sinia, E. Guzman-Novoa and P.H. Goodwin. 2012. Entomopathogenic fungi as potential bio-control agents of the ecto-parasitic mite, Varroa destructor, and their effect on the immune response of honey bees (Apis mellifera L.). Journal of Invertebrate Pathology 111: 237-243.

Guzman-Novoa, E., B. Emsen, P. Unger, L.G. Espinoza-Montaño, and T. Petukhova. 2012. Genotypic variability and relationships between mite infestation levels, mite damage, grooming intensity, and removal of Varroa destructor mites in selected strains of worker honey bees (Apis mellifera L.). Journal of Invertebrate Pathology 110: 314-320.
Backx, A., E. Guzman-Novoa and G.J. Thompson. 2012. Factors affecting ovary activation in honeybee workers: a meta-analysis. Insectes Sociaux 59: 381-388.
Unger, P. and E. Guzman-Novoa. 2012. Honey bee (Hymenoptera: Apidae) guarding behaviour may not be a rare task. Canadian Entomologist 144: 1-4.
Ament, S.A., C. Blatti, C. Alaux, M.M. Wheeler, A.L. Toth, Y. LeConte, G.J. Hunt, E. Guzman-Novoa, G. DeGrandi-Hoffman, J.L. Uribe-Rubio, G.V. Amdam, R.E. Page, S.L. Rodriguez-Zas, G.E. Robinson and S. Sinha. 2012. New meta-analysis tools reveal common transcriptional regulatory basis for multiple determinants of behavior. Proceedings of the National Academy of Sciences of the U. S. A. 109(26): 1801-1810.
Guzman-Novoa, E. 2011. Genetic Basis of Disease Resistance in the Honey Bee (Apis mellifera L.). In: Comprehensive Biotechnology, Vol. 4. M. Butler, C. Webb, A. Moreira, B. Grodzinski, Z.F. Cui, S. Agathos, and M. Moo-Young (eds.). 2nd. ed. Elsevier, Amsterdam. pp. 763-767.
Guzman-Novoa, E., A. Correa-Benítez, G. Guzman and L.G. Espinoza. 2011. Colonization, impact and control of Africanized honey bees in Mexico. Veterinaria 42: 149-178.
Guzman-Novoa, E., M.M. Hamiduzzaman, M.E. Arechavaleta-Velasco, G. Koleoglu, P. Valizadeh and A. Correa-Benítez. 2011. Nosema ceranae has parasitized Africanized honey bees in Mexico since at least 2004. Journal of Apicultural Research 50: 167-169.
Hamiduzzaman, M.M., E. Guzman-Novoa and P.G. Goodwin. 2010. A multiplex PCR assay to diagnose and quantify Nosema infections in honey bees (Apis mellifera). Journal of Invertebrate Pathology 105: 151-155.
Currie, R.W., S.F. Pernal and E. Guzman-Novoa. 2010. Honey bee colony losses in Canada. Journal of Apicultural Research 49: 104-106.
Guzmán-Novoa, E., L. Eccles, Y. Calvete, J. McGowan, P.G. Kelly and A. Correa-Benítez. 2010. Varroa destructor is the main culprit for the death and reduced populations of overwintered honey bee (Apis mellifera) colonies in Ontario, Canada. Apidologie 41: 443-450. DOI: 10.1051/apido/2009076.
Unger, P. and E. Guzmán-Novoa. 2010. Maternal effects on the hygienic behavior of Russian x Ontario hybrid honeybees (Apis mellifera L.). Journal of Heredity 101: 91-96. Doi: 10.1093/jhered/esp092. 6 pp.
Alaux, C., S. Sinha, L. Hasadsri, G.J. Hunt, E. Guzmán-Novoa, G. DeGrandi-Hoffman, J.L. Uribe-Rubio, B.R. Southey, S. Rodriguez-Zas and G.E. Robinson. 2009. Honey bee aggression supports a link between gene regulation and behavioral evolution. Proceedings of the National Academy of Sciences of the U. S. A. 106: 15400-15405. Doi: 10.1073pnas.0907043106.
Gashout, A.H. and E. Guzmán-Novoa. 2009. Acute toxicity of essential oils and other natural compounds to the parasitic mite Varroa destructor and to larval and adult worker honey bees (Apis mellifera L.). Journal of Apicultural Research 48: 263-269. Doi: 10.3896/IBRA.
Taylor, M.A., E. Guzmán-Novoa, N. Morfín and M.M. Buhr. 2009. Improving viability of cryopreserved honey bee (Apis mellifera L.) sperm with selected diluents, cryoprotectants, and semen dilution ratios. Theriogenology 72: 149-159. Doi:10.1016/j.theriogenologgy.2009.02.012.
Uribe-Rubio, J.L., E. Guzman-Novoa, C. Vázquez-Peláez, and G.J. Hunt. 2008. Genotype, task specialization, and nest environment influence the stinging response thresholds of individual Africanized and European honeybees to electrical stimulation. Behavior Genetics 38: 93-100.
Emsen, B., E. Guzmán-Novoa, and P.G. Kelly. 2007. The effect of three methods of application on the efficacy of thymol and oxalic acid for the fall control of the honey bee parasitic mite Varroa destructor in a Northern climate. American Bee Journal 147: 535-539.
Guzmán-Novoa, E. 2007. Elemental Genetics and Breeding for the Honeybee. Ontario Beekeepers Association. Guelph, On. 51 p.


Selected Awards

Distinguished Extension Award. Ontario Agricultural College, University of Guelph, 2009

APIMONDIA (International Beekeeping Federation) Gold Medal. For the book Honey Bee Pests, Predators & Diseases. “The Genetic Basis of Disease Resistance.” XXXVII International Apicultural Congress. Vancouver, Canada, 1999

Teaching Excellence Award. National University of Mexico, 1996

APIMONDIA Gold Medal. For the book Diseases and Pests of Western Honey Bees (coauthor of this book). XXXII International Apicultural Congress. Rio de Janeiro, Brazil, 1989

Research Area

bee biology, bee pathology, bee behaviour, bee genetics, bee ecology


Area of Research

Ecosystem Science and Biodiversity
Plant and Environmental Health