Ph.D. Biology, Memorial Univ. of Newfoundland, St. John’s, Canada - 1997
M.Sc. Biology, Memorial Univ. of Newfoundland, St. John’s, Canada- 1993
M.Sc. Agriculture Entomology, Mahatma Phule Agriculture Univ., Rahuri, India- 1979
B.Sc. Agriculture, College of Agriculture, Kolhapur, Mahatma Phule Agriculture Univ., India- 1977
Extension Interests and Current Efforts
The primary focus of my lab is to provideaccurate identification of plant-parasitic and free-living nematodes to extension personnel (Specialists and County based faculty) and researchers affiliated with the College of Agriculture and Environmental Sciences, University of Georgia. These accurate nematode diagnosis data generally support their research and extension disease management programs related to the parasitic nematodes that infect a wide range of plants gown for Georgia plant industries. This includes large commercial growers and producers, nurseries, greenhouses, golf courses and homeowners. Nematology lab also provides diagnostic services to the Georgia Department of Agriculture to address plant-parasitic nematode related regulatory issues. My current research is mainly focused on the implementation of different strategies to manage plant-parasitic nematodes impacting blueberry and peach industries. My research interests also include identification of potential biological control agents, plant based nematicides and nematode- suppressive soil factors that can be used for the management of plant-parasitic nematodes of different crops.
Chapters in Books
Grewal, P.S., Bai, X. and Jagdale, G.B. 2011. Longevity and stress tolerance of entomopathogenic nematodes. In: Perry, R.N., Wharton, D.A. (Eds). Molecular and Physiological Basis of Nematode Survival. CABI Publishing, Wallingford, UK Pp 157- 181.
Tomalak, M., Piggott, S. and Jagdale, G. B. 2005. Glasshouse applications. In: Nematodes As Biocontrol Agents. Grewal, P.S. Ehlers, R.-U., Shapiro-Ilan, D. (eds.). CAB publishing, CAB International, Oxon. Pp 147-166.
Park, J.J., Jagdale, G.B., Cho, K., Grewal, P.S. and Hoy, C.W. 2014. Spatial association between entomopathogenic and other free-living nematodes and the influence of habitat. Applied Soil Ecology 76: 1-6.
Jagdale, G.B., Holladay, T., Brannen, P.M., Cline, W.O., Agudelo, P., Nyczepir, A.P. and Noe, J.P. 2013. Incidence and pathogenicity of plant-parasitic nematodes associated with blueberry (Vaccinium spp.) replant disease in Georgia and North Carolina. Journal of Nematology 45: 92-98.
Timper, P., Davis, R., Jagdale, G. and Herbert, J. 2012. Resiliency of a nematode community and suppressive service to tillage and nematicide application. Applied Soil Ecology 59: 48-59.
Deol, Y.S., Jagdale, G.B., Canas, L. and Grewal, P.S. 2011. Delivery of entomopathogenic nematodes directly through commercial growing media via the inclusion of infected host cadavers: A novel approach. Biological Control 58: 60-67.
Jagdale, G.B., Kamoun, S., Grewal, P.S. 2009. Entomopathogenic nematodes induce components of systemic resistance in plants: Biochemical and molecular evidence. Biological Control 51: 102-109.
Jagdale, G. B. and Grewal, P. S. 2008. Influence of the entomopathogenic nematode Steinernema carpocapsae infected host cadavers or their extracts on the foliar nematode Aphelenchoides fragariae on Hosta in the greenhouse and laboratory. Biological Control 44: 13-23.
Hoy, C. W., Grewal, P.S., Lawrence, J.L., Jagdale, G. and Acosta, N.2008. Canonical correspondence analysis demonstrates unique soil conditions for entomopathogenic nematode species compared with other free living nematode species. Biological Control46:371-379.
Jagdale, G. B., Casey, M. L., Grewal, P. S. and Luis Cañas. 2007. Effect of entomopathogenic nematode species, split application and potting medium on the control of the fungus gnat, Bradysia difformis (Diptera : Sciaridae), in the greenhouse at alternating cold and warm temperatures. Biolological Control 43: 23-30.
Jagdale, G. B. and Grewal, P. S. 2007. Storage temperature influences desiccation and ultra violet radiation tolerance of entomopathogenic nematodes. Journal of Thermal Biology 32: 20-27.
Briar, S.S., Jagdale, G. B., Cheng, Z, Hoy, C. W., Miller, S. A. and. Grewal, P. S. 2007. Indicative value of soil nematode food web indices and trophic group abundance in differentiating habitats with a gradient of anthropogenic impact. Environmental Bioindicators 2: 146-160.
Jagdale, G. B., Saeb, A. T., Nethi Somasekhar and Grewal, P. S. 2006. Genetic variation and relationships between isolates and species of the entomopathogenic nematode genus Heterorhabditis deciphered through isozyme profiles. Journal of Parasitology 92: 509- 516.
Jagdale, G. B. and Grewal, P. S. 2006. Infection behavior and overwintering survival of foliar nematodes, Aphelenchoides fragariae on Hosta. Journal of Nematology 38: 130- 136.
Sandhu, S. K., Jagdale, G. B., Hogenhout, S. A. and Grewal, P. S. 2006. Comparative analysis of the expressed genome of the entomopathogenic nematode, Heterorhabditis bacteriophora. Molecular and Biochemical Parasitology 145: 239-244.
Grewal, P. S., Susan Bornstein-Forst, S., Burnell, A. M., Glazer, I. and Jagdale, G. B. 2006. Physiological, genetic, and molecular mechanisms of chemoreception, thermobiosis and anhydrobiosis in entomopathogenic nematodes. Biological Control 38: 54- 65.
Jagdale, G. B., Grewal, P. S. and Salminen, S. O. 2005. Both heat-shock and cold-shock influence trehalose metabolism in entomopathogenic nematodes. Journal of Parasitology 91: 988- 994.
Jagdale, G. B. and Grewal, P. S. 2004. Effectiveness of a hot water drench for the control of foliar nematodes, Aphelenchoides fragariae in floriculture. Journal of Nematology 36: 49-53.
Jagdale, G. B., Casey, M. L., Grewal, P. S. and Lindquist, R. K. 2004. Application rate and timing, potting medium and host plant on the efficacy of Steinernema feltiae against the fungus gnat, Bradysia coprophila, in floriculture. Biological Control 29: 296-305.
Jagdale, G. B., and Grewal, P. S. 2003. Acclimation of entomopathogenic nematodes to novel temperatures: trehalose accumulation and the acquisition of thermotolerance. International Journal for Parasitology 33: 145-152.
Grewal, P. S. and Jagdale, G. B. 2002. Enhanced trehalose accumulation and desiccation survival of entomopathogenic nematodes through cold preacclimation. Biocontrol Science and Technology 12: 533- 545.
Jagdale, G. B. and Grewal, P.S. 2002. Identification of alternatives for the management of foliar nematodes in floriculture. Pest Management Science 58: 451- 458.
Jagdale, G. B., Nethi Somasekhar, Grewal, P. S. and Klien M. G. 2002. Suppression of plant parasitic nematodes by application of live and dead entomopathogenic nematodes on Boxwood (Buxus spp). Biological Control 24: 42-49.
Jagdale, G. B., Ball-Coelho, B., Potter, J., Brandle, J., and Roy, R. C. 2000. Rotation crop effects on Pratylenchus penetrans and subsequent crop yields. Canadian Journal of Plant Science 80: 543-549.
Jagdale, G. B. and Gordon, R. 1998. Effect of propagation temperatures on temperature tolerances of entomopathogenic nematodes. Fundamental and Applied Nematology 21: 177-183.
Jagdale, G. B. and Gordon, R. 1998. Variable expression of isozymes in entomopathogenic nematodes follows laboratory recycling. Fundamental and Applied Nematology 21: 147-155.
Jagdale, G. B., and Gordon, R.1997. Effect of temperature on the activities of glucose-6-phosphate dehydrogenase and hexokinase in entomopathogenic nematodes (Nematoda: Steinernematidae). Comparative Biochemistry and Physiology A-Molecular & Integrative Physiology 118: 1151-1156.
Jagdale, G. B. Gordon, R. 1997. Effect of temperature on the composition of fatty acids in total lipids and phospholipids of entomopathogenic nematodes. Journal of Thermal Biology 22: 245-251.
Jagdale, G. B. and Gordon, R. 1997. Effect of recycling temperature on the infectivity of entomopathogenic nematodes. Canadian Journal of Zoology 75: 2137-2141.
Jagdale, G. B. Gordon, R. and Vrain, T. C. 1996. Use of cellulose acetate electrophoresis in the taxonomy of steinernematids (Rhabditida, Nematoda). Journal of Nematology 28: 301-309.
Jagdale, G. B. and Gordon, R.1994. Distribution of catecholamines in the nervous system of a mermithid nematode, Romanomermis culicivorax. Parasitology Research 80: 459-466.
Jagdale, G. B. and Gordon, R. 1994. Distribution of FMRF-amide-like peptide in the nervous system of a mermithid nematode, Romanomermis culicivorax. Parasitology Research 80: 467-473.
Jagdale, G.B. and Gordon, R. 1994. Role of catecholamines in the reproduction of Romanomermis culicivorax. Journal of Nematology 26: 40-45.
Jagdale, G.B. and Gordon, R. 1994. Caudal papillae in Romanomermis culicivorax. Journal of Nematology 26: 235-237.