College of Computer, Mathematical, and Natural Sciences

Galen P. Dively

Professor Emeritus and IPM Consultant




  • ENTM 798D Topic Seminar in Pest Management (1 credit). Topic seminars in the area of pest management designed to explore current theoretical and applied issues.

Graduate Program Affiliations

  • BISI - BISI-Behavior, Ecology, Evolution, & Systematics (BEES)

Extension and Research Interests

Prior to my retirement in July 2006, I had extension and research responsibilities, specializing in integrated pest management, non-target risk assessment, and pesticide resistance management. My extension work involved the development and implementation of IPM projects to reduce pesticide use in vegetable and field crops. I am still working part-time and involved with in-state and national training activities conducted to meet the continuing educational needsof agri-chemical personnel, crop advisors, county extension educators,and producers. I also provide periodic pest alerts and management recommendations tailored to real-time conditions, delivered via the Extension PestNet Report during the growing season.

Current Research

My current research projects focus on the comparative risk assessment of transgenic insecticidal crops and conventional insecticides on nontarget beneficial arthropods, including honey bee;efficacy evaluation of new transgenic corn events; testing of new insecticide formulations and active ingredients, with emphasis on organic products; and studies addressing information gaps in the biology and management of emerging pest species. In collaboration withthe pesticide industry, my laboratory also provides insect rearing and bioassay services for the monitoring and detection of resistance development in Colorado potato beetle populations.

Recent Publications

Burkness E. C., G.P. Dively, T. Patton, A.C. Morey, and W.D. Hutchison. 2010. Novel Vip3A Bacillus thuringiensis (Bt) maize approaches high-dose efficacy against Helicoverpa zea (Lepidoptera: Noctuidae) under field conditions Implications for resistance management. GM Crops 1:5, 1-7.(pdf file)

Blank, P.J., J.R. Parks, and G.P. Dively. 2011. Wintering bird response to fall mowing of herbaceous buffers. The Wilson Journal of Ornithology. The Wilson Journal of Ornithology 123(1):59–64 (pdf).

Blank, P.J., G.P. Dively, D. Gill and C. Rewa. 2011. Bird community response to filter strips in Maryland. Journal of Wildlife Management. Journal of Wildlife Management 75(1):116–125 (pdf).

Jensen, P.D., G.P. Dively, C.M. Swan, and W.O. Lamp. 2009. Exposure and non-target effects of transgenic Bt corn debris in streams. Environ. Entomol. (pdf file).

Swan, C.M., P.D. Jensen, G.P. Dively, and W.O. Lamp. 2009. Processing of transgenic crop residues in stream ecosystems. Jour. Appl. Ecology 46: 1304-1313. (pdf file).

Lawhorn, C.N., D.A. Neher, and G.P. Dively. 2009. Impact of coleopteran targeting toxin (Cry3Bb1) of Bt corn on microbially mediated decomposition. Appl. Soil Ecology (pdf file). 

Chapman, A.V., T.P. Kuhar, P.B. Schultz, T.W. Leslie, S.J. Fleischer, G.P. Dively, and J. Whalen. 2009. Integrating chemical and biological control of European corn borer in bell pepper. J. Econ. Entomol. 102(1): (in press). 

Storer, N.P., G.P. Dively, and R. Herman. 2008. Landscape effects of insect resistant GM crops. (Chapter 13, pp 273-302). In J. Romeis, A. M. Shelton, and G. G. Kennedy (eds.), Integration of Insect-resistant GM crops within IPM Programs, Springer, New York, NY. (pdf file)

Kaplan I., Dively G.P., and Denno R.F. 2008. The costs of anti-herbivore defense traits in agricultural crop plants: a case study involving leafhoppers and potato trichomes. Ecological Applications (in press). 

Alyokhin, A., M. Baker, D. Mota-Sanchez, G. Dively, and E. Grafius. 2008. Colorado potato beetle resistance to insecticides. Amer. J. of Potato Res. American Journal of Potato Research 85: 395–413.

Prasifka, J. R., R. L. Hellmich, G. P. Dively, L.S. Higgins, P.M. Dixon, and J.J. Duan. 2008. Selection of nontarget arthropod taxa for field research on transgenic insecticidal crops: using empirical data and statistical power. Environ. Entomol. 37(1): 1-10.

Kaplan I., Dively G.P, Denno R.F. 2008. Variation in tolerance and resistance to the leafhopper Empoasca fabae (Hemiptera: Cicadellidae) among potato cultivars: implications for action thresholds. J. Econ. Entomol. 101:959-968.

Rose, R.I. and G. P. Dively. 2008. Effects of insecticide-treated and lepidopteran-active Bt transgenic sweet corn on the abundance and diversity of arthropods. Environ. Entomol. 36(5): 1254- 268.

Fleischer, S., Payne, G., Kuhar, T., Herbert, A., Jr., Malone, S., Whalen, J., Dively, G., Johnson, D., Hebberger, J. A., Ingerson-Mahar, J., Miller, D., and Isard, S. 2007. Helicoverpa zea trends from the Northeast: Suggestions towards collaborative mapping of migration and pyrethroid susceptibility. Online. Plant Health Progress doi:10.1094/PHP-2007-0719-03-RV.

Duan J.J., Marvier M., Huesing J., Dively G.P., Huang Z.Y. 2008. A meta-analysis of effects of Bt crops on honey bees (Hymenoptera: Apidae). PLoS ONE 3(1): e1415. doi:10.1371/journal.pone.0001415.

Kaplan I., Lynch M.E., Dively G.P., Denno R.F. 2007. Leafhopper-induced plant resistance enhances predation risk in a phytophagous beetle. Oecologia, 152: 665-675.

Prasifka, J. R., M. D. Lopez, R. L. Hellmich, L. C. Lewis, and G. P. Dively. 2007. Comparison of pitfall traps and litter bags for sampling ground-dwelling arthropods J. Appl. Entomol. 131(2): 115-120. (pdf file)

Alyokhin, A., G.P. Dively, M. Patterson, D. Rogers, M. Mahoney, and J. Wollam. 2007. Susceptibility of Imidacloprid-Resistant Colorado Potato Beetles to Non-neonicotinoid Insecticides in the Laboratory and Field Trials. American Journal of Potato Research Amer J of Potato Res (2006) 83:485-49. (pdf file)

Alyokhin, A., G.P. Dively, M. Patterson, C. Castaldo, D. Rogers, M. Mahoney, and J. Wollam. 2007. Cross-resistance to imidacloprid and thiamethoxam in the Colorado potato beetle. Pest Management Science 63: 32-41.

Rose, R.I., G. P. Dively, and J. Pettis. 2007. Effects of Bt corn pollen on honey bees: emphasis on protocol development. Apidologie 38: 368-377 

Lynch, M.E., I. Kaplan, G.P. Dively, and R.F. Denno. 2006. Host plant-mediated competition via induced resistance: interactions between pest herbivores on potatoes. Ecological Applications 16: 855-864.

G. P. Dively. 2005. Impact of transgenic VIP3a x Cry1ab lepidopteran-resistant field corn on the nontarget arthropod community. Environ. Entomol. 34: 1267-1291. (pdf file)

Prasifka, J. R., R.L. Hellmich, G. P. Dively, and L. C. Lewis. 2005. Assessing the effects of pest management on nontarget arthropods: the influence of plot size and isolation. Environ. Entomol. 34: 1181-1192. (pdf file)

Dively, G.P., R. Rose, M.K. Sears, R.L. Hellmich, D.E. Stanley-Horn, D. D. Calvin, J.M. Russo, and P.L. Anderson. 2004. Effects on monarch butterfly larvae (Lepidoptera: Danaidae) after continuous exposure to Cry1ab-expressing corn during anthesis. Environ. Entomol. 33: 1116- 1125.

Head, G. and G.P. Dively. 2004. Impact of transgenic Bt crops on non-target animal species. In Opender Koul and G. S. Dhaliwal (eds.), Transgenic Crop Protection: Concepts and Strategies, Science Publishers Inc., New Hampshire, USA. 388 pp.

Olson, E. R., G. P. Dively, and J. O. Nelson, 2004, Bioassay determination of the distribution of imidacloprid in potato plants: implications to resistance development. J. Econ. Entomol. 97: 614-620

Selected Powerpoints

     Pictorial Guide: Parasitic hymenopteran taxa in corn
agroecosystem (ppt)
     Pictorial Guide: Carabid taxa in corn agroecosystem (ppt)
     Pictorial Guide: Diptera taxa in corn agroecosystem (ppt)
     Pictorial Guide: Master list of corn arthropod taxa (ppt)
     Brown Marmorated Sinkbug - Current Situation in Maryland (ppt)






  • 2010 L.O. Howard Distinguished Achievement Award, Eastern Branch of the Entomological Society of America

  • 2003 Life Sciences Faculty Service Award, University of Maryland, College of Chemical and Life Sciences

  • 2001 ESA Recognition Award in Entomology, Eastern Branch of the Entomological Society of America.

  • Recognized as Top 25 Most Influential People in Agriculture for 1998, Farmers Digest Magazine, November. 1998.

  • 1993 Distinguished Achievement Award in Extension, Eastern Branch of the Entomological Society of America.

  • 1992 Faculty Award of Excellence in Extension, University of Maryland, Colleges of Agriculture and Life Sciences.


  • B.S. Juniata College, Huntingdon, PA, June 1966; Major: Biology;

  • M.S. Rutgers University, New Brunswick, NJ, June 1968; Major: Entomology;

  • Ph.D. Rutgers University, New Brunswick, NJ, June 1974; Major: Entomology