University of Georgia

A website from the College of Agricultural and Environmental Sciences

Crop Virology-Tifton

Publications

Peer-Reviewed Articles

#Post-doctoral scholar; *Graduate student; ΦUndergraduate student trainee; πResearch professional; ^Corresponding author

  1. Escalante, C., Reyes, A.M., Zhao, C., Balkcom, K.S., Jacobson, A.L.,  Strayer-Scherer, A.,  Martin, K.M., Koebernick, J., Huseth, A., Kozieł, E.,  Small, I., Greene, J.K.,  Otulak-Kozieł, K.,  Mulvaney, M.J.,  Price, P.P.,  Alcalá Briseño, R.I., Bag S., and Conner, K. (2026). Metatranscriptomics analysis reveals the cotton virome in the southern United States. Sci Rep. https://doi.org/10.1038/s41598-026-40828-5
  2. Mahas., W, J., Roberts, P.M., Conner, K., Graham, S., Huseth, A, S., Steury, T, D., Mahas, J, B., Bag, S., Bowen, K., Jacobson, A, L. (2026) Cotton-dominated landscapes, vector abundance, and temperature influence cotton leafroll dwarf virus incidence in cotton. Phytopathology https://doi.org/10.1094/PHYTO-10-25-0349-R
  3. Pandey, S**., Catto, M., Roberts, P.M. Bag, S^., Jacobson, A.L., Srinivasan. R. (2026) Gene expression patterns following aphid-mediated polerovirus transmission highlight differences between vector-host and host-virus interactions. Phytopathology, https://doi.org/10.1094/PHYTO-08-25-0283-R.
  4. Acharya, NΦ*., Kumar, MΦ#., Bag, S., Torrance, T., Cloud, C., Simmons, A.M., Kumari, M., Suarez, E.,  and McAvoy, T. (2025) Performance of tomato cultivars under natural tomato yellow leaf curl disease pressure in Georgia. Plant Disease https://doi.org/10.1094/PDIS-03-25-0469-RE
  5. Jaganathan D., Dutta, B., Basu, S., Bag, S., Srinivasan, R., Eybishitz, A., Barchenger, D.W., Caarls, L., Simmons, A.M. and Nankar, A.N. (2026). Breeding vegetables for whitefly resistance: past, present, and future in the AI era. Frontiers in Plant Science 16:1724403. https://doi.org/10.3389/fpls.2025.1724403
  6. Shukla, B*., Bag, S^, Moore, J.M., McAvoy, T., Brown, N., and Culbreath, A.K. (2025) Host crop influence on the virulence of Orthotospovirus tomatomaculae isolates in Georgia. Phytopathology, 116:485-494. https://doi.org/10.1094/PHYTO-04-25-0142-R
  7. Edula, S.R*., Bag, S^., Hand, L.C., Chee, P.W., Snider, J.L., Kemerait, R.C., and Roberts, P.M. (2026). A field-based investigation of the association between cotton leafroll dwarf virus and bronze wilt-like responses in upland cotton in Georgia. Plant Pathology 75:e70083 https://doi.org/10.1111/ppa.70083 
  8. Dhadly, D.K. *, Kavalappara, S.R., McAvoy, T., Severns, P., Simmons, A.M., Srinivasan, R., and Bag, S^. (2025). Weed Hosts: Hidden reservoirs for whitefly-transmitted viruses threatening Georgia cucurbits. Plant Disease, 109:2352-2361 https://doi.org/10.1094/PDIS-12-24-2730-RE
  9. Hand L.C., Morgan, G., Bag, S., Roberts, P., Snider, J., Chee, P.W., and Kemerait. R.C. (2025) Bronze wilt symptoms reduced yields in Georgia in 2024. Journal of Cotton Science. 29:3. 113-123. https://doi.org/10.56454/PUPS7026
  10. Shukla, B*., Moore, J.M., McAvoy, T., Brown, N., Culbreath, A.K., and Bag, S^. (2025) Molecular genetic analyses of the N, NSm, and NSs genes of a local population of Orthotospovirus tomatomaculae reveals purifying selection in crops in the southeastern United States. Journal of General Virology, 106:002119. https://doi.org/10.1099/jgv.0.002119 
  11. Deraniyagala, A.S*., Roy, A., Tallury, S., Sudini, H.K., Culbreath, A.K., andBag, S^. (2025) Development of a multiplex TaqMan assay for rapid detection of groundnut bud necrosis virus: A quarantine pathogen in the USA. Viruses 17, 532. https://doi.org/10.3390/v17040532
  12. Kumar, M., Bag. S^., McAvoy, T., Torrance, Ty., Cloude, C., and Simmons A. M. (2025) A shift in Begomovirus coheni populations associated with tomato yellow leaf curl disease infecting tomato cultivars in the Southeastern United States. Plant Pathology https://doi.org/10.1111/ppa.14091
  13. Pandey, S., Roberts, P., Bag, S., Jacobson, A. L., and Srinivasan, R. (2025) A phloem-limited RNA phytovirus infection does not positively modulate vector preference and fitness in primary and alternate hosts. Environmental entomology, nvaf005. https://doi.org/10.1093/ee/nvaf005
  14. Acharya, N., Kumar, M#., Bag, S^., Riley, D.G., Diaz-Perez, J.C., Simmons, A.M., Coolong, T., and McAvoy, T. (2025) Prevalence of Aphid-Transmitted Potyviruses in Pumpkin and Winter Squash in Georgia, USA. Viruses 17, 233. https://doi.org/10.3390/v17020233
  15. Dhadly, D.K. *, Kavalappara, S.R., McAvoy, T., Severns, P., Simmons, A.M., Srinivasan, R., and Bag, S^. (2025). Cucurbit leaf crumple virus (CuLCrV) is seed transmitted in yellow squash (Cucurbita pepo L.). Plant Disease 109 (1), 63-72. https://doi.org/10.1094/PDIS-06-24-1330-RE
  16. Edula, S.R.*, Hand, L.C., Roberts, P.M., Beasley, E., Snider, J.L., Kemerait, R.C., Chee, P.W., and Bag, S^. (2024) Characterization of Caulimovirid-like Sequences from Upland Cotton (Gossypium hirsutum L.) Exhibiting Terminal Abortion in Georgia, USA. Viruses  16, 1111, https://doi.org/10.3390/v16071111
  17. Saritha, R.K., Devendran, R#., Simmons, A.M., and Bag, S^. (2024) Microneedle-assisted delivery of the cloned components of cucurbit leaf crumple virus in yellow squash (Cucurbita pepo). Journal of Virological Methods 329, 114992, https://doi.org/10.1016/j.jviromet.2024.114992
  18. Adeleke, I.A.*, Kavalappara, S. R., Codod, Clarence B., Kharel, P., Leckew, A., McGregor, C. E., Simmons, A.M., Srinivasan, R., and Bag, S^. (2024). Evaluation of plant introduction lines of yellow squash (Cucurbita pepo) for resistance against single infection of cucurbit chlorotic yellows virus and cucurbit leaf crumple virus. HortScience, 59(7),949-956. https://doi.org/10.21273/HORTSCI17861-24
  19. Davidson, E., Pereira, J., Leon, S., Navarro, E., Kavalappara, S.R., Murphy, Z., Anagnostopoulos, V., Bag, S., and Santra S. (2024). Chitosan coated selenium: A versatile nano-delivery system for molecular cargoes. Int J Biol Macromol. 267:131176. https://doi.org/10.1016/j.ijbiomac.2024.131176
  20. Smith, A., Bag, S., Rabinowitz, A., Kemerait, R., Srinivasan, R., Abney, M., Branch, W., Culbreath, A., (2024). Comparison of field performance of Georgia-16HO and florunner cultivars in the presence of tomato spotted wilt. Peanut Science 51(1), 1-7. https://doi.org/10.3146/0095-3679-51-PS23-5
  21. Kavalappara, S.R^., Bag , S^., Luckew, A., McGregor, C., Culbreath, A., Simmons, A.M. (2024) Evaluation of squash (Cucurbita pepo L.) genotypes for resistance to cucurbit chlorotic yellows virus. Horticulturae. 10 (3):264.  https://doi.org/10.3390/horticulturae10030264 
  22. Pandey, S., Catto, M., Roberts, P., Bag, S., Jacobson, A.L. and Srinivasan, R. (2024) Aphid gene expression following Polerovirus acquisition is host species dependent. Front. Plant Sci. 15:1341781. https://doi.org/10.3389/fpls.2024.1341781
  23. Díaz-Pérez, J. C., Bag, S., Coolong, T., Luo, X., Hodges, A., Bashyal, M., Milner, H., Konakalla, N. C#., & Pitcher, A. (2024). Plant growth, fruit yield, and tomato leaf curl disease of high tunnel organic tomato affected by shade net and plastic mulch color. HortScience, 59(3), 323-331. https://doi.org/10.21273/HORTSCI17516-23
  24. Devendran, R#., Kavalappara, S.R^. Simmons, A.M., Bag, S^. (2023) Whitefly-transmitted viruses of cucurbits in the Southern United States. Viruses 15(11):2278. https://doi.org/10.3390/v15112278
  25. Manish, K#., Kavalappara, S.R., McAvoy, T., Hutton, S., Simmons, A.M., and Bag, S^. (2023) Association of tomato chlorosis virus complicates the management of tomato yellow leaf curl virus in cultivated tomato (Solanum lycopersicum) in the southern United States. Horticulturae 9, 948. https://doi.org/10.3390/horticulturae9080948
  26. Chen, Y-J**., Catto, M.A., Pandey, S., Leal-Bertioli, S., Abney, M., Hunt, B.G., Bag, S., Culbreath, A. and Srinivasan, R. (2023) Characterization of gene expression patterns in response to an orthotospovirus infection between two diploid peanut species and their hybrid. Front. Plant Sci. 14:1270531.  https://doi.org/10.3389/fpls.2023.1270531
  27. Chen, Y.-J**., Pandey, S., Catto, M., Leal-Bertioli, S., Abney, M.R., Bag, S., Hopkins, M., Culbreath, A., Srinivasan, R. (2023) Evaluation of wild peanut species and their allotetraploids for resistance against thrips and thrips-transmitted tomato spotted wilt orthotospovirus (TSWV). Pathogens  12, 1102. https://doi.org/10.3390/pathogens12091102
  28. Parkash, V**., Snider, J.L., Pilon, C. Bag, S., Jespersen, D., Virk G., Dhillon K.K. (2023)Differential sensitivities of photosynthetic component processes govern oxidative stress levels and net assimilation rates in virus-infected cotton. Photosynthesis Research 158, 41–56. https://doi.org/10.1007/s11120-023-01038-6.
  29. Díaz-Pérez, J., McAvoy, T., Luo, X., and Bag, S. (2023). Alternative measures to manage silverleaf whitefly [Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae)] in zucchini (Cucurbita pepo L.) in the southeast U.S.A. Journal of Horticultural Research 31(1), 61-70. https://doi.org/10.2478/johr-2023-0002
  30. Reddy, S.E*., Bag, S^., Milner, Hπ., Kumar, M#., Suassuna N.D., Kemerait, R.C., Chee, P.W., Hand, L.C., Snider, J.L., Srinivasan, R., and Roberts, P.M. (2023).Cotton leafroll dwarf virus: an enigmatic virus disease on cotton. Molecular Plant Pathology.  https://doi.org/10.1111/mpp.13335  
  31. Kavalappara. S. R^., Bag, S^., Luckew, A., and Mcgregor, C.E. (2023). Analysis of sRNA reveals enhanced levels of RNA silencing in Cucurbita pepo line PI 420328, tolerant to cucurbit yellow stunting disorder virus infection. Viruses, 15 (3):788. https://doi.org/10.3390/v15030788  
  32. Pandey, S.; Bag, S.; Roberts, P.; Conner, K.; Balkcom, K.S.; Price, A.J.; Jacobson, A.L.; Srinivasan, R. (2022).Prospective alternate hosts of an emerging polerovirus in cotton landscapes in the southeastern United States. Viruses, 14 (10), 2249. https://doi.org/10.3390/v14102249
  33. Adeleke, I.A.*; Kavalappara, S.R.#^; McGregor, C.; Srinivasan, R.; Bag, S^. (2022). Persistent, and asymptomatic viral infections and whitefly-transmitted viruses impacting cantaloupe and watermelon in Georgia, USA. Viruses, 14, 1310. https://doi.org/10.3390/v14061310
  34. Kavalappara, S.R^.; Riley, D.G.; Cremonez, P.S.G.; Perier, J.D.; Bag, S^. (2022) Wild radish (Raphanus raphanistrum L.) is a potential reservoir host of cucurbit chlorotic yellows virus. Viruses, 14, 593. https://doi.org/10.3390/v14030593
  35. Mahas, J.W., Hamilton, F.B., Roberts, P.M., Ray, C.H., Miller, G.L., Sharman, M., Conner, K., Bag, S., Blythe, E.K., Toews, M.D., Jacobson. A.L. (2022). Investigating the effects of planting date and Aphis gossypii management on reducing the final incidence of cotton leafroll dwarf virus. Crop Protection. 158:106005. https://doi.org/10.1016/j.cropro.2022.106005
  36. Lai, P-C., Abney, M.R., Chen, Yi-Ju., Bag, S., Srinivasan., R. (2021) Discrepancies in serology-based and nucleic acid-based detection and quantitation of tomato spotted wilt orthotospovirus in leaf and root tissues from symptomatic and asymptomatic peanut plants. Pathogens, 10(11), 1476. https://doi.org/10.3390/pathogens10111476
  37. Lai, P-C., Abney, M.R., Bag, S., Srinivasan., R. (2021) Impact of host resistance to tomato spotted wilt orthotospovirus in peanut cultivars on virus population genetics and thrips fitness. Pathogens, 10(11), 1418. https://doi.org/10.3390/pathogens10111418
  38. Parkash,V., Sharma, D.B., Snider, J.L., Bag, S., Roberts, P.M.,  Tabassum, A#., West, D., Khanal, S., Suassuna, N., and Chee. P. (2021). Effect of cotton leafroll dwarf virus on physiological processes and yield of individual cotton plants. Frontiers in Plant Science. 12:734386. https://doi.org/10.3389/fpls.2021.734386
  39. Tabassum, A#., Bag S^., Suassuna, N. D., Conner,K. N., Chee, P., Kemerait, R.C., and Roberts, P. (2021). Genome analysis of cotton leafroll dwarf virus reveals variability in the silencing suppressor protein, genotypes, and genomic recombinants in the USA. PLoS ONE 16(7): e0252523. https://doi:10.1371/journal.pone.0252523
  40. Kavalappara, S.R#., Milner, H π., Konakalla, N.C#., Morgan, K Φ., Sparks, A.N., McGregor, C., Culbreath, A.K., Wintermantel, W.M., Bag, S ^. (2021) High throughput sequencing-aided survey reveals widespread mixed infections of whitefly-transmitted viruses in cucurbits in Georgia, USA. Viruses, 13 (6), 988. https://doi.org/10.3390/v13060988 (Special Issue Plant Virus Surveillance and Metagenomics)
  41. Konakalla, N.C #., Bag, S ^., Deraniyagala, A.S*., Culbreath, A.K., Pappu, H.R. (2021) Induction of plant resistance in tobacco (Nicotiana tabacum) against tomato spotted wilt orthotospovirus through foliar application of dsRNA. Viruses, 13 (4), 662. https://doi.org/10.3390/v13040662 (Special issue:  Plant Immunity to Virus Infections 2021)
  42. Bag, S^., Roberts P. M., and Kemerait R.C. (2021). Cotton leafroll dwarf virus: an emerging virus disease on cotton in the US. Crops and Soils Magazine, (2) 18-21. (Feature Article). https://doi.org/10.1002/crso.20105
  43. Sedhain, N.P*., Bag, S^., Morgan, KΦ., Carter, R., Triana, P*., Whitaker, J., Kemerait, R.C., Roberts. P.M. (2021) Natural host range, incidence on overwintering cotton, and diversity of cotton leafroll dwarf virus in Georgia USA. Crop Protection. 144, 105604. https://doi.org/10.1016/j.cropro.2021.105604
  44. Tabassum, A., Roberts, P.M., Bag. S^. (2020) Genome sequence of cotton leafroll dwarf virus (CLRDV) infecting cotton in Georgia, US. Microbial Resource Announcement 9:e00812-20. https://doi.org/10.1128/MRA.00812-20
  45. Kroese D. R., Schonneker.L., Bag.S., Frost.K., Cating.R., Hagerty C.H. (2020). Wheat soil-borne mosaic: yield loss and distribution in the US Pacific Northwest. Crop Protection, 132: 105102 https://doi.org/10.1016/j.cropro.2020.105102
  46. Kroese, D. R., Bag, S., Frost, K. E., Murray, T. D., & Hagerty, C. H. (2018). Diagnostic guide: Wheat soil-borne mosaic. Plant Health Progress, 19(2), 163-167. https://doi.org/10.1094/PHP-10-17-0064-DG
  47. Bag, S., Al Rwahnih, M., Li, A., Gonzalez, A., Rowhani, A., Uyemoto, J. K., & Sudarshana, M. R. (2015). Detection of a new luteovirus in imported nectarine trees: a case study to propose adoption of metagenomics in post-entry quarantine. Phytopathology, 105(6), 840-846. https://doi.org/10.1094/PHYTO-09-14-0262-R
  48. Bag, S., Schwartz, H. F., Cramer, C. S., Havey, M. J., & Pappu, H. R. (2015). Iris yellow spot virus (Tospovirus: Bunyaviridae): from obscurity to research priority. Molecular Plant Pathology, 16(3), 224-237. https://doi.org/10.1111/mpp.12177
  49. Iftikhar, R., Ramesh, S. V., Bag, S., Ashfaq, M., & Pappu, H. R. (2014). Global analysis of population structure, spatial and temporal dynamics of genetic diversity, and evolutionary lineages of iris yellow spot virus (Tospovirus: Bunyaviridae). Gene, 547(1), 111-118. https://doi.org/10.1016/j.gene.2014.06.036
  50. Zhai, Y., Bag, S., Mitter, N., Turina, M., & Pappu, H. R. (2014). Mutational analysis of two highly conserved motifs in the silencing suppressor encoded by tomato spotted wilt virus (genus Tospovirus, family Bunyaviridae). Archives of Virology, 159(6), 1499-1504. https://doi.org/10.1007/s00705-013-1928-8
  51. Bag, S., Rondon, S. I., Druffel, K. L., Riley, D. G., & Pappu, H. R. (2014). Seasonal dynamics of thrips (Thrips tabaci) (Thysanoptera: Thripidae) transmitters of iris yellow spot virus: A serious viral pathogen of onion bulb and seed crops. Journal of Economic Entomology, 107(1), 75-82. https://doi.org/10.1603/EC13141
  52. Bag, S., Pappu, H. R., & Schwartz, H. F. (2012). Identification and characterization of biologically distinct isolates of iris yellow spot virus (genus Tospovirus, family Bunyaviridae), a serious pathogen of onion. European Journal of Plant Pathology, 134(1), 97-104. doi:10.1007/s10658-012-0026-1
  53. Bag, S., Mitter, N., Eid, S., & Pappu, H. R. (2012). Complementation between two tospoviruses facilitates the systemic movement of a plant virus silencing suppressor in an otherwise restrictive host. PLoS ONE, 7(10), 9 pages. doi:10.1371/journal.pone.0044803
  54. Bag, S., Druffel, K. L., & Pappu, H. R. (2010). Structure and genome organization of the large RNA of iris yellow spot virus (genus Tospovirus, family Bunyaviridae). Archives of Virology, 155(2), 275-279. doi:10.1007/s00705-009-0568-5
  55. Bag, S., Druffel, K. L., Salewsky, T., & Pappu, H. R. (2009). Nucleotide sequence and genome organization of the medium RNA of Iris yellow spot virus from the United States. Archives of Virology, 154(4), 715-718. doi:10.1007/s00705-009-0349-1
  56. Jain, R. K., Bag, S., Umamaheswaran, K., & Mandal, B. (2007). Natural infection by tospoviruses of cucurbitaceous and fabaceous vegetable crops in India. Journal of Phytopathology, 155(1), 22-25. doi:10.1111/j.1439-0434.2006.01187.x

Disease Notes/New Disease Report/PDMR

  1. Acharya N., Bag, S., Riley, D.G., Diaz-Perez, J.C., Coolong, T.W., Suarez, E., and McAvoy, T. (2025). Evaluation of pumpkin cultivars for resistance to whitefly-transmitted viruses in Georgia, 2023 Plant Health Progress 26:3, 447.  https://doi.org/10.1094/PHP-02-25-0065-PDMR
  2. Acharya N., Bag, S., Riley, D.G., Diaz-Perez, J.C., Coolong, T.W., Suarez, E., and McAvoy, T. (2025). Evaluation of winter squash cultivars for resistance to whitefly-transmitted viruses in Georgia, 2023. Plant Health Progress 26:3, 451. https://doi.org/10.1094/PHP-02-25-0066-PDMR
  3. Kavalappara, S.R., Acharya, N., Suarez, R.E., McAvoy, T., Bag, S^. (2024) First Report of Watermelon Crinkle Leaf-Associated Virus-2 (WCLaV-2) in Watermelon (Citrullus lanatus) in Georgia, USA. Plant Disease. https://doi.org/10.1094/PDIS-01-24-0161-PDN  
  4. Kumar M, Torrance T, McAvoy T, Bag S. (2024) Natural occurrence of tomato chlorosis virus on tomatillo (Physalis philadelphica) in the United States. Plant Disease. 108(4):1119 https://doi.org/10.1094/PDIS-12-23-2628-PDN
  5. Jailani,A.A.K., DeSilva, S., Freeman, J.,  Dey, K., Velez-Climent, M., McVay, J., Bag, S., and Paret M.L. (2023). First report of cucurbit chlorotic yellows virus affecting squash and pumpkin in Florida, USA. Plant Health Progress, https://doi.org/10.1094/PHP-01-23-0006-BR 
  6. Adeleke A.I*, Kavalappara, S.R., Tolerance, T., Bennett, J., McGregor, C., Srinivasan, B., and Bag, S^. (2022). First report of watermelon crinkle leaf associated virus 1 naturally infecting watermelon (Citrullus lanatus) in Georgia, USA. Plant Disease, 106:2273. https://doi.org/10.1094/PDIS-11-21-2521-PDN
  7. Kavalappara, S.R., Milner, H., Riley, D. G., and Bag, S^. (2022). First report of turnip yellows virus infecting cabbage (Brassica oleracea var. capitata) in Georgia, USA. Plant Disease, 106:2273. https://doi.org/10.1094/PDIS-10-21-2174-PDN
  8. Jailani,A.A.K., Iriarte, F., Hochmuth, B., Willis, S.M., Warren, M., Dey, K., Velez-Climent, M., McVay, J., Bag, S., Paret M.L. (2022). First report of cucurbit chlorotic yellows virus affecting watermelon in USA. Plant Disease, 106:774. https://doi.org/10.1094/PDIS-03-21-0639-PDN  
  9. Kavalappara, S.R#., Milner, Hπ., Sparks, A., Mcgregor, C., Wintermantel, W. M., and Bag, S^. (2021) First report of cucurbit chlorotic yellows virus in association with other whitefly-transmitted viruses in squash (Cucurbita pepo) in Georgia. Plant Disease. 105 (6):1862. https://doi.org/10.1094/PDIS-11-20-2429-PDN
  10. Tabassum, A # ., Bag, S ^ ., Roberts, P., Suassuna, N., Chee, P., Whitaker, J.R., Conner, K.N., Brown, J., Nichols, R.L., and Kemerait, R.C. (2019). First report of Cotton leafroll dwarf virus infecting cotton in Georgia, U.S.A. Plant Disease 103 (7):1803. https://doi:10.1094/PDIS-12-18-2197-PDN
  11. Bag, S ^ ., Tabassum, A., Brock, J., & Dutta, B. (2019). First Report of tobacco streak virus infecting summer squash in Georgia, U.S.A. Plant Disease, 103(6), 1442. doi:10.1094/pdis-12-18-2232-pdn
  12. Iftikhar, R., Bag, S., Ashfaq, M., & Pappu, H. R. (2013). First report of iris yellow spot virus infecting onion in Pakistan. Plant Disease, 97(11), 1517. doi:10.1094/PDIS-05-13-0502-PDN
  13. Cramer, C. S., Bag, S., Schwartz, H. F., & Pappu, H. R. (2011). Susceptibility of Onion Relatives (Allium spp.) to iris yellow spot virus. Plant Disease, 95(10), 1319. doi:10.1094/PDIS-11-10-0819
  14. Bag, S., Rogers, P., Watson, R., & Pappu, H. R. (2009). First report of natural infection of garlic with iris yellow spot virus in the United States. Plant Disease, 93(8), 839. doi:10.1094/PDIS-93-8-0839A
  15. Evans, C. K., Bag, S., Frank, E., Reeve, J., Ransom, C., Drost, D., & Pappu, H. R. (2009). Green Foxtail (Setaria viridis), A naturally infected grass host of iris yellow spot virus in Utah. Plant Disease, 93(6), 670-671. doi:10.1094/PDIS-93-6-0670C
  16. Bag, S., Singh, J., Davis, R. M., Chounet, W., & Pappu, H. R. (2009). Iris yellow spot virus in Onion in Nevada and Northern California. Plant Disease, 93(6), 674. doi:10.1094/PDIS-93-6-0674C
  17. Evans, C. K., Bag, S., Frank, E., Reeve, J. R., Ransom, C., Drost, D., & Pappu, H. R. (2009). Natural Infection of Iris yellow spot virus in Twoscale Saltbush (Atriplex micrantha) Growing in Utah. Plant Disease, 93(4), 430. doi:10.1094/PDIS-93-4-0430C
  18. Jain, R.K., Bag, S., Awasthi, L.P. (2005) First report of natural infection of Capsicum annum by tobacco streak virus in India. Plant Pathology, 54(2): 257 doi : 10.1111/j.1365-3059.2005.01127.x

Conferences papers:

  1. Bag, S. (2025). Epidemiology of Emerging and Re-emerging Plant Viruses in Georgia Agriculture. Phytopathology 115:S2.78. https://doi.org/10.1094/PHYTO-115-12-S2.1.
  2. Kavalappara, S.R., Devendran, R., Simmons, A.M. and Bag, S. (2025). Development of an efficient agroinoculation protocol for cucurbit leaf crumple virus in yellow squash (Cucurbita pepo). Phytopathology 115:S2.88. https://doi.org/10.1094/PHYTO-115-12-S2.1.
  3. Kumar, M., Bag, S., McAvoy, T., and Simmons, A.M. (2025). Emergence and spread of Begomovirus coheni associated with tomato yellow leaf curl disease: impact on sustainable production of tomatoes in the USA.  Phytopathology 115:S2.38. https://doi.org/10.1094/PHYTO-115-12-S2.1.
  4. Dhadly, D.K., Kavalappara, S.R., McAvoy, T., Srinivasan, R., Severns, P., and Bag, S. (2025). Evaluating seed transmission of cucurbit leaf crumple virus in yellow squash: Molecular detection, field prevalence, and epidemiological insights. Phytopathology 115:S2.52. https://doi.org/10.1094/PHYTO-115-12-S2.1.
  5. Shukla, B.,  Bag, S., Brown, N., Moore, J.M., Culbreath, A., and McAvoy, T. (2025). Monitoring diversity of tomato spotted wilt virus in major cultivated hosts in Georgia, United States.  Phytopathology 115:S2.62. https://doi.org/10.1094/PHYTO-115-12-S2.1.
  6. Shukla, B*., Bag, S^, Moore, J.M., McAvoy, T., Brown, N., and Culbreath, A.K. (2025).  Molecular insights of N, NSm, and NSs-gene of Orthotospovirus tomatomaculae indicating a purifying selection in cultivated hosts in the southeastern United States. Phytopathology 115:S1.4. https://doi.org/10.1094/PHYTO-115-11-S1.1
  7. Edula, S.R*., Bag, S^., Hand, L.C., Chee, P.W., Snider, J.L., Kemerait, R.C., and Roberts, P.M. (2025). Is enigmatic cotton leafroll dwarf virus a threat to the cotton crop in Georgia, U.S.A.? Phytopathology 115:S1.3. https://doi.org/10.1094/PHYTO-115-11-S1.1
  8. Dhadly, D.K. *, Kavalappara, S.R., McAvoy, T., Severns, P., Simmons, A.M., Srinivasan, R., and Bag, S. (2025). Tracing the hidden pathways: Alternative hosts and seed transmission of whitefly-transmitted viruses in cucurbits. Phytopathology 115:S1.1. https://doi.org/10.1094/PHYTO-115-11-S1.1
  9. Kumar, M., Bag, S., McAvoy, T., Torrance, T., Cloud, C., and Simmons, A.M. (2025). Emerging population shifts in Begomovirus coheni causing tomato yellow leaf curl disease in the southeastern U.S. Phytopathology 115:S1.5. https://doi.org/10.1094/PHYTO-115-11-S1.1
  10. Shukla, B., Bag, S., Culbreath, A., Moore, J. M., Brown, N., & McAvoy, T. (2025). Diversity study of Tomato spotted wilt virus in major cultivated hosts in Southeast Georgia, United States. In Proceedings of the American Peanut Research and Education Society Vol. 57 (pp. 117)
  11. Culbreath, A., Bag, S., Kemerait, R., & Abney, M. R. (2025). Effect of contiguous peanut genotypes on incidence of tomato spotted wilt In Georgia-06G. In Proceedings of the American Peanut Research and Education Society Vol. 57 (pp. 127) Acharya,N., Bag, S., Riley, D.G., Diaz-Perez, J.C., Coolong, T., Kumar, M. and McAvoy., T. 2024 Yellow Squash and Zucchini Cultivar Evaluation for Tolerance to Whitefly and Whitefly-Transmitted Viruses in South Georgia. HortScience, 59(2S), S16.  https://doi.org/10.21273/HORTSCI.59.2S.S1
  12. Deraniyagala, A., Sudini, H. K., Tallury, A., Roy, A., and Bag, S. (2021). Development of a TaqMan Assay for the Detection of Groundnut Bud Necrosis Orthotospovirus for Quarantine Screening. Phytopathology 111:S1.3.
  13. Bag, S., Tabassum, A., Sedhain, N., Morgen, K., Suassuna, N. D., Whitaker, J., Chee. P.W., Kemeraits, R.C., Nichols R., and Roberts, P. (2020). Cotton leafroll dwarf disease: An emerging viral disease on cotton in Georgia. Phytopathology 110: S1.8.
  14. Bag, S., Tabassum, A., Sedhain, N., Kemerait, R., Chee, P., Whitaker, J., Suassuna, N.D., Nichols, R., and Roberts, P. (2020). Aphid-transmitted Cotton leafroll dwarf disease: An emerging threat to the sustainable production of cotton. Phytopathology 110: S2.214.
  15. Tabassum, A., and Bag, S. (2020) Molecular characterization of Cucurbit yellow stunting disorder virus (CYSDV) infecting summer squash in Georgia, USA. Phytopathology 110: S2.74.
  16. Bag, S., Tabassum, A., Sedhain, N., Whitaker, J., Chee, P., Roberts, P., & Kemerait, R. (2019). Cotton leafroll dwarf virus: An emerging threat to cotton production in GA. Phytopathology, S2.113.
  17. Sedhain, N., Bag, S., Kemerait, R., Whitaker, J., Chee, P., & Roberts, P. (2019). Epidemiology of Cotton leafroll dwarf virus in Georgia, USA. Phytopathology, S2.140.
  18. Suassana, T. M. F., Suassana, N. D., Holbrook, C. C., Culbreath, A. K., Bag, S., & Deraniyagala, A. S. (2019). Relationship among field and post-harvest evaluations of spotted wilt in Arachis germplasm. Proceedings American Peanut Research and Education Society, 51, 146.
  19. Bag, S., Frost, K., Rondon, S., Charlton, B., & Walenta, D. (2016). Variation in aphid abundance and Potato Virus Y incidence in Oregon potato. Phytopathology. 106 (pp. 44).
  20. Mccown, H., Bag, S., Eng, M., & Sudarshana, M. (2016). Association of Grapevine rupestris stem pitting-associated virus and Grapevine Pinot gris virus in declining grapevines on Schwarzman rootstock. Phytopathology. 106 (pp. 106).
  21. Shanmugiah, R., Iftikhar, R., Bag, S., Ashfaq, M., & Pappu, H. (2014). Global analysis of population structure, spatial and temporal dynamics of genetic diversity of Iris yellow spot virus (Tospovirus: Bunyaviridae). Phytopathology. 104 (pp. 107).
  22. Bag, S., Rondon, S. I., & Pappu, H. R. (2012). Seasonal dynamics of Iris yellow spot virus transmitters among Thrips tabaci populations from onion fields. Phytopathology. 102 (pp. 8).
  23. Bag, S., Mitter, N., & Pappu, H. R. (2011). Genetic complementation between two viruses in an otherwise restrictive host. Phytopathology Vol. 101 (pp. S12).
  24. Bag, S., Cramer, C. S., Schwartz, H. F., & Pappu, H. R. (2011). Biological characterization of distinct strains of Iris yellow spot virus (genus Tospovirus). Phytopathology. 101 (pp. S12-S13).
  25. Bag, S., Mitter, N., & Pappu, H. R. (2010). Genetic complementation between two viruses facilitates the systemic movement of a gene silencing suppressor in an otherwise restrictive host. Phytopathology. 100 (pp. S10).
  26. Bag, S., Rondon, S., & Pappu, H. R. (2009). Monitoring onion thrips (Thrips tabaci) and Iris yellow spot virus in bulb and seed onion crops: A potential IPM component for mitigating IYSV epidemics. Phytopathology. 99 (pp. S7).
  27. Bag, S., & Jain, R. K. (2009). Managing peanut stem necrosis disease in Groundnut: A transgenic approach. Phytopathology. 99 (pp. S7).
  28. Bag, S., Druffel, K. L., & Pappu, H. R. (2009). Biological and molecular characterization of Iris yellow spot virus from diverse hosts and geographic regions. Phytopathology 99 (pp. S7).

Extension bulletin or reports:

  1. Alabi, O.J., and Bag, S. (2023). Fact Sheets: Watermelon crinkle leaf-associated virus 1 (WCLaV-1) and WCLaV-2. Eds: Rebecca, A and Wintermantel, W.M. Emerging Viruses on Cucurbits Working Group. https://ecucurbitviruses.org/ (EVCWG Publication 2304)
  2. Hand, L. C., Culpepper, A., Vance, J., Harris, G., Kemerait, R. C., Liu, Y., Perry, C., Hall, D., Mallard, J., Porter, W., Roberts, P.M., Smith, A., Virk, S., Bag, S and Sintim, H. (2023). Georgia Cotton Production Guide: 2021 Georgia Cotton Production Guide (AP 124-1). https://ugacotton.com
  3. Kemerait, R. C., Culbreath, A.K., Prostko, E., Brenneman, T., Tubbs, S., Srinivasan, R., Abney, R., Monfort, S., Rabinowitz, A., Pilon, C., Bag, S., Tillman, B., Dufault, N., Mulvaney, M., Small, I., Hagan, A., Chen, C., Jacobson, A., Balkcom, K., Strayer-Scherer, A., Zerweller, A., and Anco. D. (2022). Peanut Rx: Minimizing diseases of peanut in the southeastern United States, the 2022 version of the peanut disease risk index. https://peanuts.caes.uga.edu/
  4. Bag, S., and Díaz-Pérez, J. C. (2021). Management of tomato yellow leaf curl disease in tomato using colored plastic mulches and shade net in high tunnels. 2021 Vegetable Extension and Research Report (113-3). https://secure.caes.uga.edu/extension/publications/files/pdf/AP%20113-3_2.PDF
  5. Bag, S., WEBCAST: Cotton Leafroll Dwarf Virus: Opening the Locks in Georgia January 2023. (https://www.planthealthexchange.org/cotton/Pages/GROW-COT-01-23-362.aspx) https://doi.org/10.1094/GROW-COT-01-23-362
  6. Bag, S., and Diaz-Perez, J. C. (2021). Management of tomato yellow leafcurl disease in tomato using colored plastic mulches and shade net in high tunnels. 2021 Vegetable Extension and Research Report (113-3). https://secure.caes.uga.edu/extension/publications/files/pdf/AP%20113-3_2.PDF
  7. Hand, L., Culpepper, A., Harris, G., Kemerait, R., Liu, Y., Perry, C., Porter, W., Roberts, P., Smith, A., Virk, S., and Bag, S. (2021). 2021 Georgia Cotton Production Guide: 2021 Georgia Cotton Production Guide (AP 124-1). Retrieved from https://ugacotton.com
  8. Kemerait, R., Culbreath, A., Prostko, E., Brenneman, T., Tubbs, S., Srinivasan, R., Abney, R., Monfort, S., Rabinowitz, A., Pilon, C., Bag, S., Tillman, B., Dufault, N., Mulvaney, M., Small, I., Hagan, A., Chen, C., Jacobson, A., Balkcom, K., Strayer-Scherer, A., Zerweller, A., and Anco. D. 2020. Peanut Rx: Minimizing diseases of peanut in the southeastern United States, the 2020 version of the peanut disease risk index. Retrieved from https://peanuts.caes.uga.edu/
  9. Bag, S. (2019). Report of a research review and planning meeting on cotton leafroll dwarf virus. Retrieved from https://www.cottoninc.com/
  10. Kemerait, R., Culbreath, A., Prostko, E., Brenneman, T., Tubbs, R., Srinivasan, R., . . . Smith, N. (2019). 2019 Peanut Rx Disease Risk Index.