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United States Department of Agriculture

Agricultural Research Service

Gloria D Degrandi-Hoffman
Research Leader


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Honey bee gut microbial communities are robust to the fungicide Pristine® consumed in pollen -
The effects of Imidacloprid and Varroa destructor on the survival and health of European honey bees, Apis mellifera -
Abbo, P.M., Kawasaki, J.K., Hamilton, M.C., Cook, S.C., Hoffman, G.D., Li, W., Lie, J., Chen, Y. 2016. The effects of Imidacloprid and Varroa destructor on the survival and health of European honey bees, Apis mellifera. Insect Science. doi: 10.1111/1744-7917.12335.
Disease dynamics of honeybees with Varroa destructor as parasite and virus vector -
Kang, Y., Blanco, K., Davis, T., Wang, Y., Hoffman, G.D. 2016. Disease dynamics of honeybees with Varroa destructor as parasite and virus vector. Mathematical Biosciences. 275:71-92.
Population growth of Varroa destructor (Acari: Varroidae) in honey bee colonies is affected by the number of foragers with mites -
Hoffman, G.D., Ahumada, F., Zazueta, V.E., Chambers, M.L., Hidalgo, G., Watkins De Jong, E.E. 2016. Population growth of Varroa destructor (Acari: Varroidae) in honey bee colonies is affected by the number of foragers with mites. Experimental and Applied Acarology. doi: 10.1007/s10493-016-0022-9.
The fungicide Pristine® inhibits mitochondrial function in vitro but not flight metabolic rates in honey bees -
Nath, R., Campbell, J., Gadau, J., Fox, T., Hoffman, G.D., Harrison, J. 2015. The fungicide Pristine® inhibits mitochondrial function in vitro but not flight metabolic rates in honey bees. Journal of Insect Physiology. 86:11-16.
Effects of oral exposure to fungicides on honey bee nutrition and immunity -
Hoffman, G.D., Chen, Y., Watkins De Jong, E.E., Chambers, M.L., Hidalgo, G. 2015. Effects of oral exposure to fungicides on honey bee nutrition and immunity. Journal of Economic Entomology. doi: 10.1093/jee/tov251.
Honey bee colonies provided with natural forage have lower pathogen loads and higher overwinter survival than those fed protein supplements Reprint Icon -
Hoffman, G.D., Chen, Y., Rivera, R., Carroll, M.J., Chambers, M.L., Hidalgo, G., Watkins De Jong, E.E. 2015. Honey bee colonies provided with natural forage have lower pathogen loads and higher overwinter survival than those fed protein supplements. Apidologie. doi: 10.1007/s13592-015-0386-6.
Nutrition, immunity and viral infections in honey bees -
Hoffman, G.D., Chen, Y. 2015. Nutrition, immunity and viral infections in honey bees. Current Opinion in Insect Science. 10:170-176.
Methods for comparing beebread made by Africanized and European honey bees and the effects on hemolymph protein titers Reprint Icon -
Hoffman, G.D., Eckholm, B., Huang, M. 2015. Methods for comparing beebread made by Africanized and European honey bees and the effects on hemolymph protein titers. Journal of Visualized Experiments. doi: 10.3791/52448.
Honey bee (Apis mellifera) intracolonial genetic diversity influences worker nutritional status -
Eckholm, B.J., Huang, M.H., Anderson, K.E., Mott, B.M., Hoffman, G.D. 2014. Honey bee (Apis mellifera) intracolonial genetic diversity influences worker nutritional status. Apidologie. doi: 10.1007/s13592-014-0311-4.
Israeli acute paralysis virus: epidemiology, pathogenesis and implications for honey bee health and Colony Collapse Disorder (CCD) -
Chen, Y., Pettis, J.S., Corona, M.V., Chen, W., Spivak, M., Visscher, K.P., Hoffman, G.D., Boncristiani, H., Zhao, Y., Vanengelsdorp, D., Delaplane, K., Solter, L., Drummond, F., Kramer, M.H., Lipkin, I.W., Palacios, G., Hamilton, M.C., Smith Jr, I.B., Huang, S., Zheng, H., Li, J., Zhang, X., Zhou, A., Wu, L., Zhou, J., Lee, M.L., Teixeira, E.W., Li, Z., Evans, J.D., Li, C. 2014. Israeli acute paralysis virus: epidemiology, pathogenesis and implications for honey bee health and Colony Collapse Disorder (CCD). PLoS Pathogens. 10 (7):e1004261. DOI: 10.1371/journal.ppat.1004261.
Population dynamics of Varroa destructor (Acari: Varroidae) in commercial honey bee colonies and implications for control -
Hoffman, G.D., Ahumada, F., Curry, R., Probasco, G., Schantz, L. 2014. Population dynamics of Varroa destructor (Acari: Varroidae) in commercial honey bee colonies and implications for control. Experimental and Applied Acarology. DOI 10.1007/s10493-014-9821-z.
Bigger is better: honey bee colonies as distributed information-gathering systems Reprint Icon -
Donaldson-Matasci, M., Hoffman, G.D., Dornhaus, A. 2013. Bigger is better: honey bee colonies as distributed information-gathering systems. Journal of Animal Behavior. 85(3), 585-592.
The effects of pesticides on queen rearing and virus titers in honey bees (Apis mellifera L.) Reprint Icon -
Hoffman, G.D., Chen, Y., Simonds, R. 2013. The effects of pesticides on queen rearing and virus titers in honey bees (Apis mellifera L.). Insects. 4(1), 71-89.doi:10.3390/insects4010071. http://www.mdpi.com/2075-4450/4/1/71
Are agrochemicals present in high fructose corn syrup fed to honey bees (Apis mellifera L.)? -
A comparison of bee bread made by Africanized and European honey bees (Apis mellifera) and its effects on hemolymph protein titers Reprint Icon -
Hoffman, G.D., Eckholm, B., Huang, M.H. 2012. A comparison of bee bread made by Africanized and European honey bees (Apis mellifera) and its effects on hemolymph protein titers. Apidologie. 44:52-63 DOI:10.1007/s13592-012-0154-9.
The effects of beta acids from hops (Humulus lupulus L.)on mortality of Varroa destructor (Acari: Varroidae) Reprint Icon -
Hoffman, G.D., Ahumada, F., Probasco, G., Shantz, L. 2012. The effects of beta acids from hops (Humulus lupulus L.)on mortality of Varroa destructor (Acari: Varroidae). Experimental and Applied Acarology. 58:407-421. DOI:10.1007/s10493-012-9593-2.
New meta-analysis tools reveal common transciptional regulatory basis for multiple determinants of behavior -
Viral dynamics of persistent and acute virus infections in honey bees -
Di Prisco, G., Zhang, X., Pennacchio, F., Caprio, E., Li, J., Evans, J.D., Hoffman, G.D., Hamilton, M.C., Chen, Y. 2011. Viral dynamics of persistent and acute virus infections in honey bees. Viruses. 3:2425-2441.
Heptanone Gels Using an Aryl Glycolipid -
An emerging paradigm of colony health: Microbial balance of the honey bee and hive (Apis mellifera) -
Anderson, K.E., Eckholm, B., Mott, B.M., Sheehan, T.H., Hoffman, G.D. 2011. An emerging paradigm of colony health: Microbial balance of the honey bee and hive (Apis mellifera). Insectes Sociaux. 58:431-444. DOI 10.1007/s00040-011-0194-6.
Honey Bee Health: The Potential Role of Microbes -
Hoffman, G.D., Eckholm, B., Anderson, K.E. 2012. Honey bee health: The potential role of microbes. In: Sammataro, D. and Yoder, J., editors. Honey Bee Colony Health: Challenges and Sustainable Solutions. Boca Raton, FL. CRC Press. p. 1-12.
Introduction -
Hoffman, G.D. 2012. Introduction. In: Sammataro, D. and Yoder, J., editors. Honey Bee Colony Health: Challenges and Sustainable Solutions. Boca Raton, FL. CRC Press. p. xv-xviii.
The Critical Transition Temperature (CTT) of Chalkbrood Fungi Ascosphaera apis and Ascosphaera aggregata, and its Significance for Disease Incidence -
Yoder, J.A., Heydinger, D.J., Hedges, B.Z., Sammataro, D., Hoffman, G.D. 2012. The critical transition temperature (CTT) of chalkbrood fungi Ascosphaera apis and Ascosphaera aggregata, and its significance for disease incidence. In: Sammataro, D. and Yoder, J., editors. Honey Bee Colony Health: Challenges and Sustainable Solutions. Boca Raton, FL. CRC Press. p. 131-134.
Differences Among Commonly Sprayed Orchard Fungicides in Targeting the Beneficial Fungi Associated with Honey Bee Colony and Bee Bread Provisions (In Vitro) -
Yoder, J.A., Hedges, B.Z., Heydinger, D.J., Sammataro, D., Hoffman, G.D. 2012. Differences among commonly sprayed orchard fungicides in targeting the beneficial fungi associated with honey bee colony and bee bread provisions (in vitro). In: Sammataro, D. and Yoder, J., editors. Honey Bee Colony Health: Challenges and Sustainable Solutions. Boca Raton, FL. CRC Press. p. 181-192.
Impact of Orchard Fungicide Spraying on Lowering the Amount of Symbiotic Fungi in Bee Bread and Its Implications for Reduced Colony Resistance -
Yoder, J.A., Condon, M.R., Heydinger, D.J., Hedges, B.Z., Sammataro, D., Finley-Short, J.V., Hoffman, G.D., Olson, E. 2012. Fungicides reduce symbiotic fungi in bee bread and the beneficial fungi in colonies. In: Sammataro, D. and Yoder, J., editors. Honey Bee Colony Health: Challenges and Sustainable Solutions. Boca Raton, FL. CRC Press. p. 193-214.
Molecular gels-based controlled release devices for pheromones -
Jadhav, S.R., Chiou, B., Wood, D.F., Hoffman, G.D., Glenn, G.M., John, G. 2011. Molecular gels-based controlled release devices for pheromones. Soft Materials. 7:864-867. DOI: 10.1039/c0sm00878h.
Why Supplemental Protein Feeding Can Help Reduce Colony Losses -
Hoffman, G.D., Chen, Y. 2010. Why Supplemental Protein Feeding Can Help Reduce Colony Losses. American Bee Journal. 150:1157-1160.
Intracolonial genetic diversity in honey bee (Apis mellifera) colonies increases pollen foraging efficiency -
Eckholm, B.J., Anderson, K.E., Weiss, M., Hoffman, G.D. 2011. Intracolonial genetic diversity in honey bee (Apis mellifera) colonies increases pollen foraging efficiency. Behavioral Ecology-Sociobiology. 65:1037-1044.
Pollination Ecology: Overview of Pollination and the Foraging Behavior of Honey Bees -
The Effect of Diet on Protein Concentration, Hypopharyngeal Gland Development and Virus Load in Worker Honey ees (Apis mellifera L.) Reprint Icon -
Hoffman, G.D., Chen, Y., Huang, E., Huang, M.H. 2010. The effect of diet on protein concentration, hypopharyngeal gland development and virus load in worker honey bees (Apis mellifera L.). Journal of Insect Physiology, 56:1184-1191. doi:10.1016/j.jinsphys.2010.03.017
Mating frequencies of Africanized honey bees in the southwestern United States -
Tarpy, D., Caren, J.R., Delaney, D.A., Sammataro, D., Finley, J.V., Loper, G., Hoffman, G.D. 2010. Mating frequencies of Africanized honey bees in the southwestern United States. Journal of Apiculture Research. Vol. 49(4):302-310.
Honey Bee Aggression Supports a Link Between Gene Regulation and Behavioral Evolution Reprint Icon -
Alaux, C., Sinha, S., Hasadsri, L., Hunt, G.J., Guzman-Novoa, E., Hoffman, G.D., Uribe-Rubio, J., Rodriguez-Zas, S., Robinson, G.E. 2009. Honey bee aggression supports a link between gene regulation and behavioral evolution. Proceedings of the National Academy of Sciences, 106(36): 15400-15405. doi:10.1073pnas.0907043106.
Africanized honey bees are slowere learners than their European counterparts Reprint Icon -
Couvillon, M.J., Hoffman, G.D., Gronenberg, W. 2010. Africanized honey bees are slower learners than their European counterparts. Naturwissenschaften. 97:153-160.
The Importance of Microbes in Nutrition and Health of Honey Bee Colonies Part-3: Where Do We Go From Here? -
Hoffman, G.D., Vreeland, R., Sammataro, D., Alarcon Jr, R.N. 2009. The Importance of Microbes in Nutrition and Health of Honey Bee Colonies Part-3: Where Do We Go From Here?. American Bee Journal 149:755-757.
The Importance of Microbes in Nutrition and Health of Honey Bee Colonies Part-2: Factors Affecting the Microbial Community in Honey Bee Colonies -
Hoffman, G.D., Alarcon Jr, R.N., Sammataro, D. 2009. The Importance of Microbes in Nutrition and Health of Honey Bee Colonies Part-2: Factors Affecting the Microbial Community in Honey Bee Colonies. American Bee Journal 149(6):583-584.
The Importance of Microbes in Nutrition and Health of Honey Bee Colonies -
Hoffman, G.D., Sammataro, D., Alarcon Jr, R.N. 2009. The Importance of Microbes in Nutrition and Health of Honey Bee Colonies. American Bee Journal 149:583-584.
Fungicides Can Reduce Pollination Potential -
Alarcon Jr, R.N., Hoffman, G.D., Wardell, G. 2009. Fungicides Can Reduce Pollination Potential. Western Farm Press. Vol 31(7) pp. 17 & 21.
Comparisons of the queen volatile compounds of instrumentally inseminated versus naturally mated honey bee (Apis mellifera) queens -
Huang, M.H., Hoffman, G.D., Le Blanc, B.W. 2009. Comparisons of the queen volatile compounds of instrumentally inseminated versus naturally mated honey bee (Apis mellifera) queens. Apidologie 40:464-471.
Cyclodextrins as Carriers of Monterpenes into the Hemolymph of the Honey Bee (Apis mellifera) for Integrated Pest Management -
Le Blanc, B.W., Boue, S.M., Hoffman, G.D., Deeby, T.A., Mccready, H.D., Loeffelmann, K.L. 2008. Cyclodextrins as Carriers of Monterpenes into the Hemolymph of the Honey Bee (Apis mellifera) for Integrated Pest Management. Journal of Agricultural and Food Chemistry 56(18), 8565-8573.
Comparisons of Pollen Substitute Diets for Honey bees: Consumprion Rates by Colonies and Effects on Brood and Adult Populations -
Hoffman, G.D., Wardell, G., Ahumada-Secura, F., Rinderer, T.E., Danka, R.G., Pettis, J.S. 2008. Comparisons of Pollen Substitute Diets for Honey bees: Consumprion Rates by Colonies and Effects on Brood and Adult Populations. Journal of Apicultural Research 47:265-270.
Brains and brain components in African and European honey bees (Hymenoptera: Apidae) - a volumetric comparison -
Hoffman, G.D., Lucas, T., Gronenberg, W., Caseman, D.L. 2008. Brains and brain components in African and European honey bees (Hymenoptera: Apidae) - a volumetric comparison. Journal of Apicultural Research 47:281-285.
Outcrossed Cottonseed and Adventitious Bt Plants in Arizona Refuges -
Hueberger, S., Yafuso, C, DeGrandi-Hoffman, G., Tabashnik, B. 2008. Outcrossed cottonseed and adventitious Bt plants in Arizona refuges. Environmental Biosafety Research 7:87-96.
Queen Replacement in African and European Honey Bee Colonies with and without Afterswarms -
Schneider, S.S., DeGrandi-Hoffman, G. 2008. Queen replacement in African and European honey bee colonies with and without afterswarms. Insect Sociaux 55:79-85.
Do Honey Bees Increase Sunflower See Yields? -
Hoffman, G.D. 2008. Do honey bees increase sunflower seed yields?. American Bee Journal. (148):155-156.
CONTROLLED RELEASE OF VOLATILE LIQUIDS USING STARCH GEL MATRICES AND FILMS -
Glenn, G.M., Klamczynski, A., Shey, J., Chiou, B., Holtman, K.M., Hoffman, G.D., Wood, D.F. 2007. Controlled release of volatile liquids using starch gel matrices and films. Polymers for advanced technologies. 18 (8): 636:642. (2007)
THE INFLUENCE OF SEASON AND VOLATILE COMPOUNDS ON ACCEPTANCE RATES OF INTRODUCED EUROPEAN HONEY BEE (APIS MELLIFERA L.) QUEENS INTO EUROPEAN AND AFRICANIZED COLONIES -
DeGrandi-Hoffman, G., Gilley, D., Hooper, J. The influence of season and volatile compounds on the acceptance of introduced European honey bee (Apis mellifera) Queens into European and Africanized colonies. Apidologie 38:230-237. 2007.
EFFECTS OF HONEY BEE (HYMENOPTERA: APIDAE) FORAGING ON SEED SET IN SELF-FERTILE SUNFLOWERS (HELIANTHUS ANNUUS L.) -
DeGrandi-Hoffman, G., Chambers, M. 2006. Effects of Honey Bee (Hymenoptera: Apidae) Foraging on Seed Set in Self-fertile Sunflowers (Helianthus annuus L.). Environ. Entomol. 35(4): 1103-1108.
THE AFRICAN HONEY BEE: A CASE STUDY OF A BIOLOGICAL INVASION -
Schneider, S., DeGrandi-Hoffman, G., Smith, D., Tarpy, D. The African Honey Bee: A Case Study of a Biological Invasion. Bee Culture. 2006. Vol. 134, No. 4. 21-24.
Permeability of starch gel matrices and select films to solvent vapors -
Glenn, G.M., Klamczynski, A., Ludvik, C.N., Shey, J., Imam, S.H., Chiou, B., Mchugh, T.H., Orts, W.J., Wood, D.F., Hoffman, G.D., Offeman, R.D. 2006. Permeability of starch gel matrices and select films to solvent vapors. Journal of Agricultural and Food Chemistry. 54(9):3297-3304.
VOLATILE COMPOUNDS PRODUCED BY LIVE EUROPEAN HONEY BEE (APIS MELLIFERA L.) QUEENS -
Gilley, D.C., DeGrandi-Hoffman, G., Hooper, J.E. Volatile compounds produced by live European honey bees (Apis mellifera L.) queens. J. Insect. Physiol. 52: 520-527. 2006.
THE POPULATION DYNAMICS OF VARROA MITES IN HONEY BEE COLONIES: PART 1 - THE VARROA POP PROGRAM -
DeGrandi-Hoffman, G., Curry, R. The population dynamics of Varroa mites in honey bee colonies: Part I - The VARROAPOP program. Amer. Bee J. 2005. Vol. 145(7):592-595.
THE POPULATION DYNAMICS OF VARROA MITES IN HONEY BEE COLONIES: PART 2 - WHAT THE COMPUTER MODEL REVEALS -
DeGrandi-Hoffman, G., Curry. R. Simulated population dynamics of Varroa mites in honey bee colonies: Part II - What the VARROAPOP model reveals. Amer. Bee J. 2005. Vol. 145(8): 629-632.
THE POPULATION DYNAMICS OF VARROA MITES IN HONEY BEE COLONIES: PART 3 - HOW BEEKEEPING PRACTICES COULD AFFECT VARROA POPULATIONS -
DeGrandi-Hoffman, G., Curry, R. The population dynamics of Varroa mites in honey bee colonies: Part III - How beekeeping practices could affect Varroa populations. Amer. Bee J. 2005. Vol. 145(9):709-710.
MECHANISMS THAT FAVOR THE CONTINUITY OF THE AFRICAN HONEYBEE GENOME IN THE AMERICAS -
Schneider, S.S., DeGrandi-Hoffman, G. Mechanisms that favor the continuity of the African honeybee genome in the Americas. Proc. 8th IBRA Intl. Conf. Tropical Bees and VI Encontro sobre Abelhas, Ribeirao Preto, SP, Brazil. 2004. pp. 232-240.
DESCRIPTION OF AN INTERMORPH BETWEEN A WORKER AND QUEEN IN AFRICAN HONEY BEES APIS MELLIFERA SCUTELLATA (HYMENOPTERA: APIDAE) -
DeGrandi-Hoffman, G., Chambers, M., Hooper, J.E., Schneider, S.S. Description of an intermorph between a worker and queen in African honey bees Apis mellifera scutellata (Hymenoptera: Apidae). Ann. Entomol. Soc. Am. 2004. 97:1299-1305.
DESCRIPTION AND VALIDATION OF A MATHEMATICAL MODEL OF VARROA MITE (VARROA DESTRUCTOR) AND HONEYBEE (APIS MELLIFERA L.) POPULATION DYNAMICS -
DeGrandi-Hoffman, G., Curry, R. Description and Validation of a Mathematical Model of Varroa Mite (Varroa destructor) and Honeybee (Apis mellifera L.) Population Dynamics. 2004. Internat. J. Acarol. 2004. Vol. 30, No. 3.
NEST USURPATION BY AFRICAN HONEY BEES IN THE SOUTHWESTERN U.S. -
Schneider, S.S., Deeby, T., Gilley, D.C. and DeGrandi-Hoffman, G. Seasonal nest usurpation of European colonies by African swarms in Arizona, USA. Insect. Soc. 51:359-364. 2004.
TESTING A COMBINATION OF CONTROL TACTICS TO MANAGE THE VARROA DESTRUCTOR MITE(ACARI: VARROIDAE) LEVELS IN HONEY BEE (HYMENOPTERA: APIDAE) COLONIES -
Sammataro, D., DeGrandi-Hoffman, G., Ostiguy, O., Wardell, G., Finley, J. Testing a combination of control strategies to manage Varroa destructor (Acari: Varroidae) population levels in honey bee (Hymenoptera: Apidae) colonies. 2004. Inter. J. Acarology 30:71-76.
THE INFLUENCE OF HYBRIDIZATION BETWEEN AFRICAN AND EUROPEAN HONEY BEES, APIS MELLIFERA, ON ASYMMETRIES IN WING SIZE AND SHAPE -
Schneider, S. S., Leamy, L. J., Lewis, L. A., DeGrandi-Hoffman, G. The influence of hybridization between African and European honeybees, Apis mellifera, on asymmetries in wing size and shape. 2003. Evolution 57(10). pp. 2350-2364.
PATRILINE COMPOSITION OF WORKER POPULATIONS IN HONEY BEE (APIS MELLIFERA L.) COLONIES HEADED BY QUEENS INSEMINATED WITH AFRICAN AND EUROPEAN DRONES -
DeGrandi-Hoffman, G., Tarpy, D. A., Schneider, S. S. Patriline composition of worker populations in honeybee (Apis mellifera) colonies headed by queens inseminated with semen from African and European drones. 2003. Apidologie 34, 111-120.
THE INFLUENCE OF PATERNITY ON VIRGIN QUEEN SUCCESS IN HYBRID COLONIES OF EUROPEAN AND AFRICAN HONEY BEES APIS MELLIFERA -
Schneider, S. S., DeGrandi-Hoffman, G. The influence of paternity on virgin queen success in hybrid colonies of European and African honeybees. 2003. Animal Behaviour 65:883-892.
THE AFRICAN HONEY BEE: FACTORS CONTRIBUTING TO A SUCCESSFUL BIOLOGICAL INVASION -
Schneider, S. S., DeGrandi-Hoffman, G., Smith, D. R. The African honey bee: Factors contributing to a successful biological invasion. Ann. Rev. Entomol. 2004. 49:351-376.
THE INFLUENCE OF WORKER BEHAVIOR AND PATERNITY ON THE DEVELOPMENT AND EMERGENCE OF HONEY BEE QUEENS -
Schneider, S. S., DeGrandi-Hoffman, G. The influence of worker behavior and paternity on the development and emergence of honey bee queens. 2002. Insectes Sociaux 49, 306-314.
FACTORS INFLUENCING THE SELECTION OF RECIPIENTS BY WORKERS PERFORMING VIBRATION SIGNALS IN COLONIES OF THE HONEY BEE APIS MELLIFERA -
Lewis, L. A., Schneider, S. S., DeGrandi-Hoffman, G. Factors influencing the selection of recipients by workers performing vibration signals in colonies of the honeybee, Apis mellifera. 2002. Animal Behaviour 63, 361-367.
HONEY BEE QUEEN PRODUCTION: TIGHT GENES OR TOO MUCH FOOD? -
INSIGHTS ON BEMISIA POPULATION DYNAMICS FROM SIMULATIONS WITH THE BIOCONTROL-WHITEFLY MODEL -
BIOCONTROL-WHITEFLY: A WHITEFLY, PARASITE, AND PREDATOR POPULATION DYNAMICSMODEL -
Last Modified: 8/26/2016
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