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United States Department of Agriculture

Agricultural Research Service


Research Entomologist

Photo of Dr. Guy Hallman

Dr. Guy Hallman
Research Entomologist

Stored Product Insect Research Unit
Center for Grain & Animal Health Research

1515 College Ave.
Manhattan, KS 66502

Voice: (785) 776-2705
Fax: (785) 537-5584

Research Interests

Guy Hallman is a Research Entomologist with the USDA-ARS at the Center for Grain and Animal Health Research, Stored Product Insect Research Unit, in Manhattan, Kansas. He received his Ph.D. in Entomology from Texas A&M University in 1982 and was a postdoctoral entomologist at the International Center for Tropical Agriculture in Cali, Colombia from 1982 to 1984. He has worked in ARS since 1986, first in Miami, FL before being redirected to Weslaco, TX in 1995 and then redirected to Manhattan KS in 2012. His research specializes in overcoming biological barriers to trade in agricultural commodities (phytosanitation).

Current Research Projects

Phytosanitary measures to overcome biological barriers to trade
Dr. Hallman was moved to SPIRU in June 2012 from the ARS lab Weslaco, TX where he was working on phytosanitary issues. He is completing that previous work as he transitions to working on stored-product entomology. Two major components of this continuing effort are development of generic phytosanitary treatments using ionizing irradiation and development of proactive phytosanitary treatments against invasive tephritid fruit flies. The first is part of a 5-year, 12-nation cooperative effort sponsored by the UN Food and Agriculture Organization and the International Atomic Energy Agency (FAO/IAEA). The US is a major user of phytosanitary irradiation technology. The second major effort emerged from a routine visit to FAO/IAEA laboratories in Seibersdorf, Austria, where tephritid colonies are maintained for sterile insect technique work. For some time, the USDA had been trying to organize phytosanitary research with a new highly invasive tephritid, Bactrocera invadens, in Africa, and Dr. Hallman found that there was a lab colony of the pest at Seibersdorf. Arrangements were made to work with it and other species of tephritids there, so now critical phytosanitary research is being done in Seibersdorf with tephritids that threaten US horticulture and international trade. Exotic tephritids are frequently trapped in the US, and proactive phytosanitary measures can prevent them from inhibiting exports.

Recent Publications
Article LinkHallman, G.J. 2013. Rationale for a generic phytosanitary irradiation dose of 70 Gy for the genus Anastrepha (Diptera: Tephritidae). Florida Entomologist 96: 983-990.
pdf icon PDF Hallman, G.J. 2013. Control of stored product pests by ionizing radiation. J. Stored Prod. Res. 52: 36-41.
pdf icon PDF Hallman, G.J., A.G. Parker, and C.M. Blackburn. 2013. The case for a generic phytosanitary irradiation dose of 400 Gy for Lepidoptera that infest shipped commodities as pupae. J. Econ. Entomol. 106: 525-532.
Article LinkHallman, G.J., S.W. Myers, G. Taret, E.A. Fontenot, and M.J.B. Vreysen. 2013. Phytosanitary cold treatment for oranges infested with Bactrocera zonata (Diptera: Tephritidae). J. Econ. Entomol. 106: 2336-2340.
Article LinkHallman, G.J., S.W. Myers, M.F. El-Wakkad, M.D. Tadrous, and A.J. Jessup. 2013. Development of phytosanitary cold treatments for oranges infested with Bactrocera invadens and Bactrocera zonata (Diptera: Tephritidae) by comparison with existing cold treatment schedules for Ceratitis capitata (Diptera: Tephritidae). J. Econ. Entomol. 106: 1608-1612.
Article LinkHulasare, R., M.E. Payton, G.J. Hallman, and T.W. Phillips. 2013. Potential for hypobaric storage as a phytosanitary treatment: Mortality of Rhagoletis pomonella (Diptera: Tephritidae) in apples and effects on fruit quality. J. Econ. Entomol. 106: 1173-1178.
Article LinkBustos-Griffin, E., G.J. Hallman, and R.L. Griffin. 2012. Current and potential trade in horticultural products irradiated for phytosanitary purposes. Rad. Physics Chem. 81: 1203-1207.
Article LinkCannon, R.J.C., G.J. Hallman, and C. Blackburn. 2012. The pros and cons of using irradiation for phytosanitary treatments. Outlooks on Pest Manage. Feb. 2012/ 22: 108-114.
Hallman, G.J. 2012. Generic phytosanitary irradiation treatments. Rad. Physics. Chem. 81: 861-866.
Article LinkKang, F., G.J. Hallman, Y. Wei, F. Zhang, and Z. Li. 2012. Effect of X-ray irradiation on the physical and chemical quality of America red globe grape. African J. Biotech. 11: 7966-7972.
Article LinkHallman, G.J. 2011. Phytosanitary applications of irradiation. Comprehensive Rev. Food Sci. Food Safety 10: 143-151.
Article LinkHallman, G.J., and D.B. Thomas. 2011. Evaluation of the efficacy of the methyl bromide fumigation schedule against Mexican fruit fly (Diptera: Tephritidae) in citrus fruit. J. Econ. Entomol. 104: 63-68.
Article LinkHallman, G.J., K. Guo, and T.-X. Liu. 2011. Phytosanitary irradiation of Liriomyza trifolii (Diptera: Agromyzidae). J. Econ. Entomol. 104: 1851-1855.
Article LinkHallman, G.J., S.W. Myers, A.J. Jessup, and A. Islam. 2011. Comparison of in vitro heat and cold tolerances of the new invasive species Bactrocera invadens (Diptera: Tephritidae) with three known tephritids. J. Econ. Entomol. 104: 21-25.
Hossain, M.A., G.J. Hallman, S.A. Khan, and M.S. Islam. 2011. Phytosanitary irradiation in South Asia. J. Entomol. Nematol. 3: 44-53.
Article LinkThomas, D.B., and G.J. Hallman. 2011. Developmental arrest in Mexican fruit fly (Diptera: Tephritidae) irradiated in grapefruit. Ann. Entomol. Soc. Am. 104: 1367-1372.
pdf icon PDF Hallman, G.J. 2010. Efficacy of delayed atmospheric modification in a heat/modified atmosphere phytosanitary treatment. J. Econ. Entomol. 103: 34-39.
pdf icon PDF Hallman, G.J., and D.B. Thomas. 2010. Ionizing radiation as a phytosanitary treatment against fruit flies (Diptera: Tephritidae): Efficacy in naturally versus artificially infested fruit. J. Econ. Entomol. 103: 1129-1134.
PDF at NALHallman, G.J., and R.L. Hellmich. 2010. Modified atmosphere storage may reduce efficacy of irradiation phytosanitary treatments. Acta Hort. 857: 159-162.
Article LinkHallman, G.J., N.M. Levang-Brilz, J.L. Zettler, and I.C. Winborne. 2010. Factors affecting ionizing radiation phytosanitary treatments, and implications for research and generic treatments. J. Econ. Entomol. 103: 1950-1963.
Article LinkLester, G.E., G.J. Hallman, and J.A. Pérez. 2010. ?-irradiation dose: effects on baby-leaf spinach ascorbic acid, carotenoids, folate, a-tecopherol, and phylloquinone concentrations. J. Agric. Food Chem. 58: 4901-4906.
PDF at NALArthur, F.H., J.A. Johnson, L.G. Neven, G.J. Hallman, and P.A. Follett. 2009. Insect pest management in postharvest ecosystems in the United States of America. Outlooks Pest Manage. 20: 279-284.
pdf icon PDF Hallman, G.J., and R.L. Hellmich. 2009. Ionizing radiation as a phytosanitary treatment against European corn borer (Lepidoptera: Crambidae) in ambient, low oxygen, and cold conditions. J. Econ. Entomol. 102: 64-68.
Neven, L.G., E.M. Yahia, and G.J. Hallman. 2009. Effects on insects, pp. 233-266. In E.M. Yahia (ed.), Modified and controlled atmospheres for the storage, transportation, and packaging of horticultural commodities. CRC Press, Boca Raton, Fla.
Vincent, C., P. Weintraub, and G.J. Hallman. 2009. Physical control of insect pests, pp. 794-798. In Cardé, R.T. and V.H. Resh (eds.), Encyclopedia of insects Academic Press, San Diego
Vincent, C., P. Weintraub, G.J. Hallman, and F. Fleurat-Lessard. 2009. Insect management with physical methods in pre- and post-harvest situations, pp. 309-323. In E.B. Radcliffe, W.D. Hutchison, and R.E. Cancelado (eds.), Integrated pest management Cambridge Univ. Press.
pdf icon PDF Hallman, G.J. 2008. Potential increase in fruit fly (Diptera: Tephritidae) interceptions using ionizing irradiation phytosanitary treatments. J. Econ. Entomol. 101: 716-719.
pdf icon PDF Hallman, G.J., and T.W. Phillips. 2008. Ionizing irradiation of adults of Angoumois grain moth (Lepidoptera: Gelechiidae) and Indianmeal moth (Lepidoptera: Pyralidae) to prevent reproduction, and implications for a generic irradiation treatment for insects. J. Econ. Entomol. 101: 1051-1056.
Heather, N.W., and G.J. Hallman. 2008. Pest management and phytosanitary trade barriers, pp 1-13. In Pest Management and Phytosanitary Trade Barriers CABI Press, Wallingford, UK.
pdf icon PDF Blessington, T., J.C. Miller Jr., M.N. Nzaramba, A.L. Hale, L. Redivari, D.C. Scheuring, and G.J. Hallman. 2007. The effects of low-dose gamma irradiation and storage time on carotenoids, antioxidant activity, and phenolics in the potato cultivar Atlantic. Am. J. Potato Res. 84: 125-131.
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Last Modified: 5/19/2014