Entomology and Plant Pathology

Dr. Kristopher L. Giles, Professor

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B.S., Alma College, 1990

M.S., Iowa State University, 1992

Ph.D., Iowa State University, 1996
kris.giles@okstate.edu

 

Teaching:

ENTO 4223 Ecological Methodology
ENTO 5513 Biological Control
ENTO/PLP 5524 Integrated Management of Insect Pests and Pathogens

Program Personnel:

Senior Research Analyst
Dr. Ali Zarrabi - Canola IPM

Postdoctoral Fellows
Dr. Georges Backoulou - Remote Sensing of Aphid Infestations

Graduate Students
Kody Mullins, Ph.D. - Intraguild Predation
Casi Jessie, M.S. - Intraguild Predation

Former Students and Postdoctoral Fellow
Fangling Tao - Applied Mathematician, Eli Lilly
Yi Chen - Associate Professor, Alderson-Broaddus College
Emad Ismail - Associate Professor, Cairo University
Sean Keenan - Environmental Analyst with BIO-WEST, Inc.
Doug Jones - Extension IPM Specialist, Illinois
Vasile Catana - Programmer, Department of Plant Pathology, Kansas State University
Matt Rawlings - Monstanto
Dayna Collett - DM Crop Research Group, Inc.
Mpho Phoofolo - Teaching Faculty-National University of Lesotho

Current research in winter wheat and canola:

Aphids: Sampling, Population Dynamics, Economic Injury Levels, Effects of Grazing, Relationship with Barley Yellow Dwarf

Natural Enemies: Sampling, Thresholds, Tritrophic Interactions, Population Ecology, Impact in diverse agricultural systems

Product Evaluation: Selectivity, Dosages, Integrated Control

Personal information:

Family: Married to Dr. Christine Johnson, Associate Professor and Associate Dean, Research and Graduate Studies, Human Environmental Science, OSU.

Recent Publications:

Phoofolo, M. W., K. L. Giles and N. C. Elliott. 2010. Effects of relay-intercropping sorghum with winter wheat, alfalfa, and cotton on lady beetle (Coleoptera: Coccinellidae) abundance and species composition. Environ. Entomol. 39: 763-774.

Backoulou, G. F., N. C. Elliott, K. L. Giles, V. Catana, M. Phoofolo, F. B. Peairs, and G. L. Hein. 2010. The Relationship between Russian Wheat Aphid Abundance and Edaphic and Topographic Characteristics in Wheat Fields. Southwestern Entomol. 35: 11-18.

Berberet, R. C., K. L. Giles, A. A. Zarrabi and M. E. Payton. 2009. Development, reproduction, and within-plant infestation patterns of Aphis craccivora (Koch) (Homoptera: Aphididae) on alfalfa. Environ. Entomol. 38: 1765-1771.

Elliott, N. C. M. Mirik, Z. Yang, T. Dvorak, M. Rao, J. Michels, C. Walker, V. Catana, M. Phoofolo, K. Giles, and T. Royer. 2009. Airborne remote sensing to detect greenbug stress to wheat. Southwest. Entomol. 34: 205-211.

Phoofolo, M. W., N. C. Elliott and K. L. Giles. 2009. Analysis of growth and development in the final larval instar of three species of predatory Coccinellidae under varying prey availability. Entomol. Exper. Appl. 131: 264-277.

Chen, M. S., E. Echegaray, R. J. Whitworth, H. Wang, P. E. Sloderbeck, A. Knutson, K. L. Giles, and T. A. Royer. 2009. Virulence Analysis of Hessian Fly (Mayetiola destructor) Populations from Texas, Oklahoma, and Kansas. J. of Econ. Entomol. 102: 774-780.

Royer, T. A., K. L. Giles and M. M. Lebusa. 2008. Preference and suitability of greenbug, Schizaphis graminum (Hemiptera: Aphididae) parasitized by Lysiphlebus testaceipes (Hymenoptera: Braconidae) as a food source for Coccinella septimpunctata and Hippodamia convergens (Coleoptera: Coccinellidae). Biological Control. 47: 82-88.

Jones, D. B.,K. L. Giles and N. C. Elliott. 2008. Supercooling points of Lysiphlebus testaceipes and its host Schizaphis graminum. Environ. Entomol. In press.

Phoofolo, M. W., K. L. Giles and N. C. Elliott. 2008. Larval Life History Responses to Food Deprivation in Three Species of Predatory Lady Beetles (Coleoptera: Coccinellidae). Environ. Entomol. 37: 315-322.

Elliott, N. C. M. Mirik, Z. Yang, T. Dvorak, M. Rao, J. Michels, C. Walker, V. Catana, M. Phoofolo, K. Giles, and T. Royer. 2007. Airborne multi-spectral remote sensing of Russian wheat aphid injury to wheat. Southwest. Entomol. 32: 213-219

Phoofolo, M. W., K. L. Giles and N. C. Elliott. 2007. Quantitative evaluation of suitability of the greenbug, Schizaphis graminum, and the bird cherry-oat aphid, Rhopalosiphum padi, as prey for Hippodamia convergens (Coleoptera: Coccinellidae). Biological Control. 41: 25-32.

 

Keenan, S. P., K. L. Giles, P. A. Burgener, and N. Elliott. 2007. Collaborating with Wheat Growers in Demonstrating Areawide Integrated Pest Management. J. Extension. http://www.joe.org/joe/2007february/a7.shtml

Jones, D. B., K. L. Giles, N. C. Elliott and M. E. Payton. 2007. Parasitism of greenbug, Schizaphis graminum, by the parasitoid Lysiphlebus testaceipes, at winter temperatures. Environ. Entomol. 36: 1-8.

Elliott, N. C., F. L. Tao, R. Fuentes-Granados, K. L. Giles, D. T. Elliott, M. H. Greenstone, K. A. Shufran, and T. A. Royer. 2006. D-vac sampling for predatory arthropods in winter wheat. Biological Control. 38: 325-330.

Elliott, N. C., F. L. Tao, K. L. Giles, S. D. Kindler, B. W. French, M. H. Greenstone, and K. A. Shufran. 2006. Ground beetle density in Oklahoma winter wheat fields. Southwest. Entomol. 31: 121-128.

Elliott, N. C., F. L. Tao, K. L. Giles, T. A. Royer, M. H. Greenstone, and K. A. Shufran. 2006. First quantitative study of rove beetles in Oklahoma winter wheat fields. BioControl. 51: 79-87.

Dogramaci, M., J. W. Shrefler, K. L. Giles, and J. V. Edelson. 2006. Spatial Pattern and Sequential Sampling of Squash Bug (Heteroptera: Coreidae) Adults in Watermelon. J. Econ. Entomol. 99: 559-567.

Elliott, N. C., F. L. Tao, K. L. Giles, S. D. Kindler, B. W. French, M. H. Greenstone, and K. A. Shufran. 2006. Ground beetle density in Oklahoma winter wheat fields. Southwest. Entomol. 31: 121-128.

Payton, M. E., S. J. Richter, K. L. Giles and T. A. Royer. 2006. On transformations of count data for tests of interaction in factorial and split-plot experiments. J. Econ. Entomol. 99: 1002-1006.

Elliott, N. C., F. L. Tao, R. Fuentes-Granados, K. L. Giles, D. T. Elliott, M. H. Greenstone, K. A. Shufran, and T. A. Royer. 2006. D-vac sampling for predatory arthropods in winter wheat. Biological Control. 38: 325-330.

Elliott, N. C., F. L. Tao, K. L. Giles, T. A. Royer, M. H. Greenstone, and K. A. Shufran. 2006. First quantitative study of rove beetles in Oklahoma winter wheat fields. BioControl. 51: 79-87.

Royer, T. A., K. L. Giles, T. Nyamanzi, R. M. Hunger, E. G. Krenzer, N. C. Elliott, S. D. Kindler, and M. Payton. 2005. Economic Evaluation of the Effects of Planting Date and Application Rate of Imidacloprid for Management of Cereal Aphids and Barley Yellow Dwarf in Winter Wheat. J. Econ. Entomol. 98: 95-102.

Jones, D. B., K. L. Giles, Y. Chen, and K. Shufran. 2005. Estimation of Hymenopteran parasitism in cereal aphids using molecular markers. J. Econ. Entomol. 98: 217-221.

Giles, K. L., J. W. Dillwith, R. C. Berberet, and N. C. Elliott. 2005. Survival, development, and growth of Coccinella septempunctata fed Schizaphis graminum from resistant and susceptible winter wheat. Southwest. Entomol. 30: 113-120.

Elliott, N.C., T.A. Royer, K. L. Giles, S. D. Kindler, D. R. Porter, D. T. Elliott, and D. A. Waits. 2004. A web-based management decision support system for greenbugs in winter wheat. Crop Management. http://www.plantmanagementnetwork.org/cm/

Kindler, S. D., L. Hesler, N. Elliott, T. Royer, and K. Giles. 2004. Seasonal abundance of rice root aphid in wheat and effects on forage and grain yields. Southwest. Entomol. 29: 245-252.

Jones, D. B, K. L. Giles, R. C. Berberet, T. A. Royer, N. C. Elliott, and M. E. Payton. 2003. Functional responses of an introduced parasitoid and an indigenous parasitoid on greenbug at four temperatures. Environ. Entomol. 32: 425-432.

Giles, K. L., D. B. Jones, T. A. Royer, N. C. Elliott, and S. D. Kindler. 2003. Development of a sampling plan in winter wheat that estimates cereal aphid parasitism levels and predicts population suppression. J. Econ. Entomol. 96: 975-982.

Ismail, E. A., K. L. Giles, L. Coburn, T. A. Royer, R. M. Hunger, J. Verchot, G. W. Horn, E. G. Krenzer, T. F. Peeper, M. E. Payton, G. J. Michels, and D. A. Owings. 2003. Effects of Aphids, Barley Yellow Dwarf, and Grassy Weeds in Grazed Winter Wheat. Southwest. Entomol. 28: 121-130.

Elliott, N. C., K. L. Giles, T. A. Royer, S. D. Kindler, D. B. Jones, and F. L. Tao. 2003. The negative binomial as a probability distribution for describing counts of Schizaphis graminum on wheat. Southwest. Entomol. 28: 131-136.

Elliott, N. C., K. L. Giles, T. A. Royer, S. D. Kindler, F. L. Tao, D. B. Jones, and G. W. Cuperus. 2003. Fixed precision sequential sampling plans for the greenbug and birdcherry-oat aphid (Homoptera: Aphididae) in winter wheat. J. Econ. Entomol. 96: 1585-1593.

Weiser, L. A., J. J. Obrycki, and K. L. Giles. 2003. Within-field manipulations of potato leafhopper (Homoptera: cicidellidae) and insect predator populations using and uncut alfalfa strip. J. Econ. Entomol. 96: 1184-1192.

Kindler, S. D., N. C. Elliott, K. L. Giles, and T. A. Royer. 2003. Economic injury levels for the greenbug , Schizaphis graminum, in winter wheat. Southwest. Entomol. 28: 163-166.

Giles, K. L., R. D. Madden, R. E. Stockland, M. E. Payton, and J. W. Dillwith. 2002. Host plants affect predator fitness via the nutritional value of herbivore prey: investigation of a plant-aphid-ladybeetle system. BioControl.47:1-21.

Chen, Y., K. L. Giles, and M. H. Greenstone. 2002. Molecular evidence for a species complex in the genus Aphelinus (Hymenoptera: Aphelinidae). Ann. Entomol. Soc. Am. 95: 29-34.

Kindler, S. D., N. C. Elliott, K. L. Giles, T. A. Royer, R. Fuentes-Granados, and F. Tao. 2002. Effect of greenbugs on winter wheat yield. J. Econ. Entomol. 95: 89-95.

Prinsloo, G., Y. Chen, K. L. Giles, and M. H.Greenstone. 2002. Release and recovery in South Africa of the exotic aphid parasitoid Aphelinus hordei (Hymenoptera: Aphelinidae) verified by the polymerase chain reaction. BioControl. 47: 127-136.

Elliott, N. C., R. W. Kieckhefer, G. J. Michels, Jr., and K. L. Giles. 2002. Predator abundance in alfalfa in relation to aphids, within-field vegetation, and landscape structure. Environ. Entomol. 31: 253-260.

Giles, K. L., R. C. Berberet, A. A. Zarrabi, and J. W. Dillwith. 2002. Influence of Alfalfa Cultivar on Suitability of Acyrthosiphon kondoi Shinji for the Survival and Development of Hippodamia convergens Guerin-Meneville and Coccinella septempunctata L. J. Econ. Entomol. 95: 552-557.

Royer, T. A., K. L. Giles, S. D. Kindler and N. C. Elliott. 2001. Developmental response of three geographic isolates of Lysephlebus testaceipes (Hymensoptera: Aphidiidae) to temperature. Environ. Entomol. 30: 637-641.

Fuentes-Granados, K. L. Giles, N. C. Elliott, and D. R. Porter. 2001. Assessment of greenbug-resistant wheat germplasm on Lysiphebus testaceipes Cresson (Hymenoptera: Aphidiidae) oviposition and development in greenbug over two generations. Southwest. Entomol. 26: 187-194.

Giles, K. L., R. E. Stockland, R. D. Madden, M. E. Payton, and J. W. Dillwith. 2001. Preimaginal survival and development of Coleomegilla maculata (DeGeer) and Hippodamia convergens Gurin-Meneville (Coleoptera: Coccinallidae) reared on Acyrthosiphon pisum Harris: effects of host plants. Environ. Entomol. 30: 964-971.

Giles, K. L., R. D. Madden, M. E. Payton, and J. W. Dillwith. 2000. Survival and development of Chrysoperla rufilabris (Neuroptera: Chrysopidae) supplied with pea aphids (Homoptera: Aphididae) reared on alfalfa and faba bean. Environ. Entomol. 29: 304-311.

Giles, K. L., R. L. Hellmich, C. Iverson and L. C. Lewis. 2000. Effects of transgenic Bacillus thuringiensis (Berlinger) maize grain on Bt-susceptible Plodia interpunctella (HÜbner). J. Econ. Entomol. 93: 1011-1016.

Giles, K. L., T. A. Royer, N. C. Elliott, and S. D. Kindler. 2000. Development and Validation of a Binomial Sequential Sampling Plan for the Greenbug (Homoptera: Aphididae) Infesting Winter Wheat in the Southern Plains. J. Econ. Entomol. 93: 1522-1530.

Giles, K. L., T. A. Royer, N. C. Elliott, and S. D. Kindler. 2000. Binomial sequential sampling of Rhopalosiphum padi in winter wheat in the southern plains. Southwest. Entomol. 25: 191-199.

Chen, Y, K. L. Giles, M. E. Payton, and M. H. Greenstone. 2000. Identifying key cereal aphid predators by molecular gut analysis. Molec. Ecol. 9: 1887-1898.

Book Chapters:

Giles, K. L. and N. W. Walker. 2009. Dissemination and impact of IPM programmes in US agriculture. In (Peshin and Dhawan Eds.) Integrated Pest Management: Innovation-Development Process Vol.2. pgs 481-506. Springer, United Kingdom.

Giles, K. L., G. Hein, and F. Peairs. 2008. Areawide Pest Management of Cereal Aphids in Dryland Wheat Systems of the Great Plains. In (Koul et al. Eds.) Areawide pest management: Theory and Implementation. CABI, UK. Pgs. 441-466.

Giles, K. L. and N. W. Walker. 2008. Dissemination and impact of IPM programmes in US agriculture. In (Peshin and Dhawan Eds.) Integrated Pest Management: Innovation-Development Process Vol.1. In press.

Giles, K. L., N. Elliott and T. A. Royer. 2007. Biological Control. In (Buntin et al. Eds.) ESA Handbook of small grain insects.

Keenan, S. P., K. L. Giles, N. C. Elliott, T. A Royer, P. A. Burgener, and D. R. Porter. 2007. Producer perspectives on area-wide pest management for wheat in the southern U.S. great plains. In Opender K, and G. W. Cuperus (Eds.), Ecologically-Based Integrated Pest Management. Pgs. 289-314. Taylor & Francis, UK.

Obrycki, J. J., N. Elliott and K. L. Giles. 1999. Coccinellid introductions: potential for and evaluation of non-target effects. In (Folett and Duan Eds.) "Nontarget effects of biological control". Kluwer Academic.

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