Publications

Gaulke, E., & Goldman, I. L. (2022). Screening Table Beet and Swiss Chard for Resistance to Pseudomonas syringae pathovar aptata. HortScience. https://doi.org/10.21273/HORTSCI16777-22

Nampijja, M., Derie, M., & du Toit, L. J. (2021). First report of bacterial leaf spot caused by Pseudomonas syringae pv. aptata on Swiss Chard, Beta vulgaris subsp. vulgaris , in Arizona. Plant Disease, PDIS-12-20-2554-PDN. https://doi.org/10.1094/PDIS-12-20-2554-PDN

Koike, S. T., Henderson, D. M., Bull, C. T., Goldman, P. H., & Lewellen, R. T. (2003). First report of bacterial leaf spot of Swiss chard caused by Pseudomonas syringae pv. aptata in California. Plant Disease, 87(11), 1397. https://doi.org/10.1094/PDIS.2003.87.11.1397B

S.J. Pethybridge, S. Murphy, & J.R. Kikkert. (n.d.). Efficacy of pesticides for bacterial leaf spot control in table beet, 2023. https://www.plantmanagementnetwork.org/pub/trial/pdmr/volume18/abstracts/V010.asp

Pratibha Sharma, Sean Murphy, Julie R. Kikkert, & Sarah J. Pethybridge. (n.d.). Susceptibility of Table Beet Cultivars to Foliar Diseases in New York. https://doi.org/https://doi.org/10.1094/PHP-01-24-0005-RS

Morrison, A. K., & Goldman, I. L. (n.d.). Chromosome 1 QTLs associated with response to bacterial leaf spot in Beta vulgaris. https://doi.org/https://doi.org/10.1002/csc2.21448

Marilen Nampijja, Neha Potnis, Carolee T. Bull, & Lindsey J. du Toit. (2025, August 2). Prevalence and genetic diversity of Pseudomonas syringae pv. aptata in table beet and Swiss chard seed production in Washington State. Plant Health 2025, Honolulu, HI. https://www.pseudosonseed.org/wp-content/uploads/APS-2025_Mtg-Psa_prevalence_diversity-Final.pdf

M., N., Boyd, L. N., Crane S., Dundore-Arias, J. P., E., G., Herschlag, R., Huerta, A. I., Kulesza, E., Kan, K., Newberry, E. A., & Potnis, N. (2020). Integrated management of emerging seedborne Pseudomonas syringae pathogens of cucurbits and chenopods. Phytopathology. https://pseudosonseed.org/wp-content/gallery/posters/Slide1.jpg

Boyd, L., Kikkert, J., & Bull, C.T. (2020). Strategies for isolation of Myxobacteria and specificity of biological control of Pseudomonas syringae seedborne pathogens of chenopods and cucurbits. Plant Health 2020.

Safni, I., Ramos Sepulveda, L., Goldman, P. H., Derie, M. L., du Toit, L. J., Koike, S. T., & Bull, C. T. (2016). Genetic diversity of Pseudomonas syringae causing bacterial leaf spot on table beet (Beta vulgaris) and Swiss chard (Beta vulgaris subsp. cicla)<i>. https://pseudosonseed.org/wp-content/uploads/2021/06/Chenopods-Pathogens-Safni-FINAL-2016.pdf

Samuel Osabutey, Sarah Pethybridge, Irwin Goldman, & Carolee T. Bull. (n.d.). Virulence and aggressiveness of diverse Pseudomonas syringae pv. aptata strains on resistant and susceptible table beet and Swiss chard cultivars. https://www.pseudosonseed.org/wp-content/uploads/Osabutey-Plant-Health-2025-Final.pdf

Rachel Herschlag, & Carolee T. Bull. (n.d.). Using PopCOGenT to group pathogens within the Pseudomonas syringae species complex and generate hypotheses about host range. https://www.pseudosonseed.org/wp-content/uploads/Herschlag-APS-Poster-20250722-final.pdf

Mozhde Hamidizade, Neha Potnis, Michelle P. MacLellan, Alexander C. Smith, & Carolee T. Bull. (n.d.). A TaqMan qPCR-based detection assay for Pseudomonas syringae pv. aptata causing bacterial leaf spot of Table beet and Swiss chard. https://www.pseudosonseed.org/wp-content/uploads/Hamidizade-et-al.-APS-2025.pdf

Carolee T. Bull, Stephanie Crane, Marilen Nampijja, Nina Falcone, Shaheen Bibi, Raymond Garcia-Rodriguez, Mozhde Hamidizade, Cameron Smith, Michelle Pena MacLellan, Samuel Osabutey, Irda Safni, Rachel Herschlag, Neha Potnis, & Lindsey J. du Toit. (n.d.). Diversity of seedborne Pseudomonas syringae pv. aptata isolates associated with  bacterial leaf spot of table beet and Swiss chard. https://www.pseudosonseed.org/wp-content/uploads/Bull-Plant-Health-2025-FINAL.pdf

Morrison, A., & Goldman, I. (n.d.). QTLs on Chromosome One Associated with Bacterial Leaf Spot Response in Beta vulgaris. https://www.pseudosonseed.org/wp-content/uploads/ASSBT-2025-Morrison_PDF-scaled.jpg

Nampijja, M., Crane, S., du Toit, L., & Ocamb, C. (2021). Swiss Chard (Beta vulgaris subsp. cicla)-Bacterial Leaf Spot. https://pnwhandbooks.org/plantdisease/host-disease/swiss-chard-beta-vulgaris-subsp-cicla-bacterial-leaf-spot

Nampijja, M., Crane, S., du Toit, L., & Ocamb, C. (2021). Beet, Red (Beta vulgaris)-Bacterial Leaf Spot. https://pnwhandbooks.org/plantdisease/host-disease/beet-red-beta-vulgaris-bacterial-leaf-spot

Pethybridge, S. J. (2021). Bacterial leaf spot. Chenopodiaceae Chapter in World Handbook of Vegetables.

Nampijja, M. (2021). Epidemiology and management of bacterial leaf spot caused by Pseudomonas syringae pv. aptata in table beet and Swiss chard seed production.

Fullem, K., Pena, M., Potnis, N., Goss, E., Minsavage, G., Iriarte, F., Holland, A., Jones, J., & Paret, M. (2024). Unexpected Diversity of Pseudomonads Associated with Bacterial Leaf Spot of Cucurbits in the Southeastern United States. Plant Disease. https://doi.org/https://doi.org/10.1094/PDIS-06-23-1081-SR

Rennberger. (2023). Genome-Wide Association Study of Resistance to Pseudomonas syringae in the USDA Collection of Citrullus amarus. https://doi.org/https://doi.org/10.1094/PDIS-04-23-0795-RE

Nampijja, M., Derie, M., & du Toit, L. J. (2021). First report of bacterial leaf spot caused by Pseudomonas syringae pv. aptata on Swiss Chard, Beta vulgaris subsp. vulgaris , in Arizona. Plant Disease, PDIS-12-20-2554-PDN. https://doi.org/10.1094/PDIS-12-20-2554-PDN

Branham, S. E., Levi, A., & Wechter, W. P. (2018). QTL mapping identifies novel source of resistance to Fusarium wilt race 1 in Citrullus amarus. Plant Disease, 103(5), 984–989. https://doi.org/10.1094/PDIS-09-18-1677-RE

Branham, S. E., Patrick Wechter, W., Lambel, S., Massey, L., Ma, M., Fauve, J., Farnham, M. W., & Levi, A. (2018). QTL-seq and marker development for resistance to Fusarium oxysporum f. sp. niveum race 1 in cultivated watermelon. Molecular Breeding, 38(11), 139. https://doi.org/10.1007/s11032-018-0896-9

Tymon, L. S., & Inglis, D. A. (2017). Identification and pathogenicity of Pseudomonas syringae genomospecies 1 phylogroup 2B causing leaf spots and fruit warts on cucurbits in western Washington, U.S. Journal of Plant Pathology, 99(3), 713–722. https://doi.org/10.4454/jpp.v99i3.3956

Branham, S. E., Levi, A., Farnham, M. W., & Patrick Wechter, W. (2017). A GBS-SNP-based linkage map and quantitative trait loci (QTL) associated with resistance to Fusarium oxysporum f. sp. niveum race 2 identified in Citrullus lanatus var. citroides. Theoretical and Applied Genetics, 130(2), 319–330. https://doi.org/10.1007/s00122-016-2813-0

Newberry, E. A., Jardini, T. M., Rubio, I., Roberts, P. D., Babu, B., Koike, S. T., Bouzar, H., Goss, E. M., Jones, J. B., Bull, C. T., & Paret, M. L. (2016). Angular leaf spot of cucurbits is associated with genetically diverse Pseudomonas syringae strains. Plant Disease, 100(7), 1397–1404. https://doi.org/10.1094/PDIS-11-15-1332-RE

Kierseten R. Fullem, Michelle P. MacLellan, Fanny B. Iriarte, Mousami Poudel, Sarah Capik, Keith Dedonder, James L. Bono, Dayna M. Harhay, Gregory P. Harhay, Erica M. Goss, Neha Potnis, Gerald V. Minsavage, Jeffrey B. Jones, & Mathews L. Paret. (n.d.). From cantaloupe to cattle: Pseudomonas alabamensis sp. nov. described from diseased cantaloupe (Cucumis melo) foliage and a bovine (Bos taurus) nasopharynx. https://doi.org/https://doi.org/10.1099/ijsem.0.006848

Kierseten R. Fullem, Michelle P. MacLellan, Mousami Poudel, Erica M. Goss, Neha Potnis, Gerald V. Minsavage, Jeffrey B. Jones, & Mathews L. Paret. (n.d.). Pseudomonas boreofloridensis sp. nov., and Pseudomonas citrulli sp. nov., isolated from watermelon in Florida. https://doi.org/https://doi.org/10.1099/ijsem.0.006596

Kierseten R. Fullem, Aleksa Obradovic, Michelle P. MacLellan, Mousami Poudel, Gerald V. Minsavage, Erica M. Goss, Neha Potnis, Jeffrey B. Jones, & Mathews L. Paret. (n.d.). Pseudomonas serbiensis sp. nov. isolated from watermelon and muskmelon in Serbia. https://doi.org/https://doi.org/10.1099/ijsem.0.006613

Fullem, K. R., Maclellan, M. A., Goss, E. M., Huguet-Tapia, J. C., Potnis, N., Jones, J. B., & Paret, M. L. (2024). A broad-scale genomic comparison of Pseudomonas syringae strains associated with cucurbits and other hosts. [Poster]. ICPPB. https://www.pseudosonseed.org/wp-content/uploads/ICPPB_2024_Poster_VERSION2.pdf

Tymon, L., & Inglis, D. (2016). First occurrence of pseudomonas syringae pv. syringae causing lesions on pumpkin fruit in WA, U.S.

Bushong, K. R., Jones, J. B., Paret, M. L., Potnis, N., & Pena, M. (n.d.). Characterizing genetic diversity of Pseudomonas strains causing foliar diseases of cucurbits in Florida and Alabama. APS 2022. https://www.pseudosonseed.org/wp-content/uploads/APS-2022-Poster-2nd-Edition-scaled.jpg

Bushong, K., Paret, M., Da Silva, S., Freeman, J., Jones, J., Hochmuth, B. (2021). Bacterial and angular leaf spot diseases of watermelon and other cucurbits caused by Pseudomonas syringae: Disease cycle and comparative assessment of control options. https://www.flfwa.com/post/industry-research-article

FWA. (2021, January 27). Watermelon Disease and Pathogen Series. Floridawatermelon. https://www.flfwa.com/post/industry-research-article

Fullem, K., Paret, M. L., & Jones, J. B. (n.d.). Bacterial Leaf Spot of Cucurbits. https://edis.ifas.ufl.edu/publication/PP376

Penn State. (2019, October 3). Plant pathologist awarded grant to aid global study of seedborne pathogens. https://news.psu.edu/story/591380/2019/10/03/research/plant-pathologist-awarded-grant-aid-global-study-seedborne

Nampijja, M., Crane, S., du Toit, L., & Ocamb, C. (2021). Beet – Bacterial leaf spot. J.W. Pscheidt and C.M. Ocamb, editors. https://pnwhandbooks.org/plantdisease/host-disease/beet-red-beta-vulgaris-bacterial-leaf-spot

Pethybridge, S. J., Sharma, P., & Kikkert., J. R. (2021). Bacterial leaf spot of table beet. Cornell Vegetables (Factsheet).

García-Rodríguez, R. & G., B. (2021). Bacterial Leaf Spot of Cucurbits, Beets, and Swiss Chard. https://extension.psu.edu/pennsylvania-vegetable-disease-update-august-25-2021

Pethybridge, S. J., Sharma, P., & Kikkert., J. R. (2021). Spot the differences on table beet leaves! Cornell VegEdge 17(12):6-7 (Factsheet).

Pethybridge, S. J. (2021). Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production. Chapter 14 – Beets.

Hesse, C., Schulz, F., Bull, C. T., Shaffer, B. T., Yan, Q., Shapiro, N., Hassan, K. A., Varghese, N., Elbourne, L. D. H., Paulsen, I. T., Kyrpides, N., Woyke, T., & Loper, J. E. (2018). Genome-based evolutionary history of Pseudomonas. spp. Environmental Microbiology, 20(6), 2142–2159. https://doi.org/https://doi.org/10.1111/1462-2920.14130

Lacault, C., Briand, M., Jacques, M.-A., & Darrasse, A. (2020). Zucchini vein clearing disease Is caused by several lineages within Pseudomonas syringae species complex. Phytopathology®, 110(4), 744–757. https://doi.org/10.1094/PHYTO-07-19-0266-R

Nikolić, I., Berić, T., Dimkić, I., Popović, T., Lozo, J., Fira, D., & Stanković, S. (2019). Biological control of Pseudomonas syringae pv. aptata on sugar beet with Bacillus pumilus SS-10.7 and Bacillus amyloliquefaciens (SS-12.6 and SS-38.4) strains. Journal of Applied Microbiology, 126(1), 165–176. https://doi.org/10.1111/jam.14070

Nikolić, I., Stanković, S., Dimkić, I., Berić, T., Stojšin, V., Janse, J., & Popović, T. (2018). Genetic diversity and pathogenicity of Pseudomonas syringae pv. aptata isolated from sugar beet. Plant Pathology, 67(5), 1194–1207. https://doi.org/https://doi.org/10.1111/ppa.12831

Newberry, E. A., Ritchie, L., Babu, B., Sanchez, T., Beckham, K. A., Jones, J. B., Freeman, J. H., Dufault, N. S., & Paret, M. L. (2017). Epidemiology and management of bacterial leaf spot on watermelon caused by Pseudomonas syringae. Plant Disease, 101(7), 1222–1229. https://doi.org/10.1094/PDIS-11-16-1628-RE

Dutta, B., Gitaitis, R. D., Driver, J. E., & Smith, S. (2015). First report of bacterial leaf spot on watermelon caused by Pseudomonas syringae pv. syringae in Georgia. Plant Disease, 100(2), 518–518. https://doi.org/10.1094/PDIS-06-15-0658-PDN

Stojšin, V., Balaž, J., Budakov, D., Stanković, S., Nikolić, I., Ivanović, Ž., & Popović, T. (2014). First Report of Pseudomonas syringae pv. aptata Causing Bacterial Leaf Spot on Sugar Beet in Serbia. Plant Disease, 99(2), 281–281. https://doi.org/10.1094/PDIS-06-14-0628-PDN

Langston, D. B., Sanders, F. H., Brock, J. H., Gitaitis, R. D., Flanders, J. T., & Beard, G. H. (2003). First report of a field outbreak of a bacterial leaf spot of cantaloupe and squash caused by Pseudomonas syringae pv. syringae in Georgia. Plant Disease, 87(5), 600–600. https://doi.org/10.1094/PDIS.2003.87.5.600B

Morris, C. E., Glaux, C., Latour, X., Gardan, L., Samson, R., & Pitrat, M. (2000). The relationship of host range, physiology, and genotype to virulence on cantaloupe in Pseudomonas syringae from cantaloupe blight epidemics in France. Phytopathology®, 90(6), 636–646. https://doi.org/10.1094/PHYTO.2000.90.6.636