J. Christopher Bergh


  • Tree Fruit and Grape Entomology


  • Ph.D., Entomology, 1988, University of New Brunswick, Fredericton, NB, Canada
  • B.A., Biology, 1980, University of New Brunswick, Fredericton, NB, Canada

Professional Experience

  • 2012 – present Professor of Entomology, Virginia Tech, Winchester, Va.
  • 2006 – 2012 Associate Professor of Entomology, Virginia Tech, Winchester, Va.
  • 2000 – 2006 Assistant Professor of Entomology, Virginia Tech, Winchester, Va.
  • 1994 – 2000 Post-Doctoral Research Associate, University of Florida, Lake Alfred, Fla.
  • 1993 – 1994 Post-Doctoral Research Associate, Nova Scotia Agricultural College, Truro, Nova Scotia
  • 1990 – 1993 Visiting Research Scientist, Agriculture Canada, Summerland, British Columbia
  • 1988 – 1990 Post-Doctoral Research Associate, Kansas State University, Manhattan, Kan.

Professional Memberships

  • Entomological Society of America
  • Virginia Horticultural Society

My research program employs the principles of applied insect ecology to address extant and emerging pest management issues in eastern tree fruits and wine grapes. These projects seek to expand our knowledge of the biology and behavior of pest and beneficial species, toward the refinement of existing monitoring and management technologies and the development and validation of new tactics that will reduce reliance on synthetic pesticides.


  • Biological control of woolly apple aphid
  • Biology, ecology, and management of brown marmorated stink bug in orchard crops
  • Optimizing the management of direct pests of tree fruit
  • New approaches for monitoring and managing grape root borer in vineyards


Current Graduate Students

  • Nicole Quinn  (PhD)
  • Whitney Hadden  (PhD)

My Extension program promotes the adoption of decision-making processes for pest management that rely on information about the occurrence, relative abundance, and developmental stage of pest species of tree fruits and wine grapes. Current emphasis in tree fruit systems is to assist growers with the need to simultaneously manage brown marmorated stink and the other key pests of historical importance while minimizing secondary pest outbreaks. Regular updates for growers, extension agents and crop consultants throughout each growing season provide information about the current status of key pests of apple and peach, based on pheromone trap-based monitoring in my research orchards and on the predictions of degree-day, pest phenology models. New results from insecticide efficacy trials are incorporated into all recommendations, toward promotion of optimized pest control, insecticide resistance management, and minimization of detrimental biological and ecological effects of management programs. Major components of my Extension program include presentations at winter, spring and summer educational meetings for growers, Master Gardeners, and other stakeholders, updates via blog, maintenance of a Tree Fruit Pest Management website, and participation in annual revisions to numbered extension publications.

Publications of the last five years are listed (*denotes graduate student or post-doctoral associate). See the complete list.

  • Bergh, J.C., W.R. Morrison III, *S.V. Joseph, and T.C. Leskey. 2016. Characterizing spring emergence of adult Halyomorpha halys (Hemiptera: Pentatomidae) using experimental overwintering shelters and commercial pheromone traps. Entomol. Exp. Appl. In press
  • *Acebes-Doria, A.L., T.C. Leskey, and J.C. Bergh. 2016. Temporal and directional patterns of nymphal Halyomorpha halys movement on the trunk of selected wild and fruit tree hosts. Environ. Entomol. In press
  • Bergh, J.C. and J.W. Stallings. 2016. Field evaluations of the contribution of predators
  • and the parasitoid, Aphelinus mali, to biological control of woolly apple aphid, Eriosoma lanigerum, in Virginia, USA. BioControl 61: 155-165
  • *Acebes-Doria, A.L., T.C. Leskey, and J.C. Bergh. 2016. Injury to apples and peaches at harvest from feeding by Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) nymphs early and late in the season. Crop Protection 89: 58-65
  • *Acebes-Doria, A.L., T.C. Leskey, and J.C. Bergh. 2016. Development and comparison of trunk traps to monitor movement of Halyomorpha halys (Hemiptera: Pentatomidae) nymphs on host trees. Entomol. Exp. Appl. 158: 44-53
  • *Rijal, J.P. and J.C. Bergh. 2016. Food-finding capability of grape root borer (Lepidoptera: Sesiidae) neonates in soil column bioassays. J. Entomol. Sci. 51: 54-68
  • *Acebes-Doria, A.L., T.C. Leskey, and J.C. Bergh. 2016. Host plant effects on Halyomorpha halys (Hemiptera: Pentatomidae) nymphal development and survivorship. Environ. Entomol. 45: 663-670
  • Leskey, T.C., A. Agnello, J.C. Bergh, G.P. Dively, G.C. Hamilton, P. Jentsch, A. Khrimian, G. Krawczyk, T.P. Kuhar, D.-H. Lee, W.R. Morrison III, D.F. Polk, C. Rodriguez-Saona, P.W. Shearer, B.D. Short, P.M. Shrewsbury, J.F. Walgenbach, D.C. Weber, C. Welty, J. Whalen, and F. Zaman. 2015. Attraction of the invasive Halyomorpha halys (Hemiptera: Pentatomidae) to traps baited with semiochemical stimuli across the United States. Environ. Entomol. 44: 746-756
  • *Joseph, S.V., M. Nita, T.C. Leskey, and J.C. Bergh. 2015. Temporal effects on the incidence and severity of brown marmorated stink bug (Hemiptera: Pentatomidae) feeding injury to peaches and apples during the fruiting period in Virginia. J. Econ. Entomol. 108: 592-599
  • *Joseph, S.V., J.W. Stallings, T.C. Leskey, G. Krawczyk, D. Polk, B. Butler, and J.C. Bergh. 2014. Spatial distribution of brown marmorated stink bug injury at harvest mid-Atlantic in apple orchards. J. Econ. Entomol., 107: 1839-1848
  • *Rijal, J.P., C.C. Brewster, and J.C. Bergh. 2014. Effects of biotic and abiotic factors on grape root borer (Lepidoptera: Sesiidae) infestations in commercial vineyards in Virginia. Environ. Entomol. 43: 1198-1208
  • Rice, K., C. Bergh, E. Bergman, D. Biddinger, C. Dieckhoff, G. Dively, H. Fraser, T. Gariepy, G. Hamilton, T. Haye, A. Herbert, K. Hoelmer, C. Hooks, A. Jones, G. Krawczyk, T. Kuhar, W. Mitchell, A. Nielsen, D. Pfeiffer, M. Raupp, C. Rodriguez-Saona, P. Shearer, P. Shrewsbury, D. Venugopal, J. Whalen, N. Wiman, T. Leskey, and J. Tooker. 2014.  Biology, ecology, and management of brown marmorated stink bug (Halyomorpha halys). J. of IPM 5: A1-A13. DOI: http://dx.doi.org/10.1603/IPM14002
  • *Rijal, J.P., C.C. Brewster, and J.C. Bergh. 2014. Spatial distribution of grape root borer (Lepidoptera: Sesiidae) infestations in Virginia vineyards and implications for sampling. Environ. Entomol. 43: 716-728
  • *Frank, D.L., A. Zhang, S.E. Wright, J.F. Walgenbach, J.C. Bergh, and T.C. Leskey. 2014. Effect of a pheromone antagonist-based disruption blend on dogwood borer (Lepidoptera: Sesiidae) mate-finding and infestation in a commercial apple orchard. J. Entomol. Sci. 49: 44-55
  •  *Rijal, J.P., A. Zhang, and J.C. Bergh. 2013. Behavioral response of grape root borer (Lepidoptera: Sesiidae) neonates to grape root volatiles. Environ. Entomol. 42: 1338-1347
  • Lee, D-H, B.D. Short, *S.V. Joseph, J.C. Bergh, and T.C. Leskey. 2013. Review of the biology, ecology, and management of Halyomorpha halys (Stål) (Hemiptera:  Pentatomidae) in China, Japan, and the Republic of Korea. Environ. Entomol. 42: 627-641
  • Bergh, J.C.  2013.  Lepidopteran Borers. In: Agnello and Walgenbach (eds.), Compendium of Apple and Pear Diseases and Insects. Am. Phytopath. Soc., St. Paul, MN
  • Zhang, A., T.C. Leskey, J.C. Bergh, and J.F. Walgenbach. 2013. Sex pheromone dispenser type and trap design affect capture of dogwood borer. J. Chem. Ecol.  DOI 10.1007/s10886-013-0251-x
  • Joseph, S.V.*, J.C. Bergh, S.E. Wright, and T.C. Leskey. 2013. Factors affecting captures of brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae), in baited pyramid traps. J. Entomol. Sci. 48: 43-51
  • Aristizabal, L.F, C. Mannion, J.C. Bergh, and S. Arthurs. 2012. Life history of the pink hibiscus mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudociccidae), on three Hibiscus cultivars. Fl. Entomol. 95: 89-94
  • Bergh, J.C.  2012.  Grape Root Borer. pp. 383-402 In: Bostanian, Vincent and Isaacs (eds.), Arthropod Management in Vineyards. Springer-Verlag    
J. Chirstopher Bergh
  • 540-232-6046
  • Fax: 540-869-0862