Resources

Extension Publications, Trial Reports, Presentations

Davis, Jeanine. 2024. Efficacy of fungicides for organic tomato production. New Crops & Organics. North Carolina State Extension. https://newcropsorganics.ces.ncsu.edu/2023/10/efficacy-of-fungicides-for-organic-tomato-production/

herbicide damage in tomato Daughtry, Minda and Pam Kerley. 2018, Herbicide Carryover in Hay, Manure, Compost, and Grass Clippings: Caution to Hay Producers, Livestock Owners, Farmers, and Home Gardeners .

tomatoes Egel, Dan, Lori Hoagland and Ashley Adair. 2023. Efficacy of Selected Fungicides Listed for Organic Production for Tomato Disease Management. eOrganic article.

Bacterial spot photo Egel, Dan, 2021. Tomato Disease Photos. This presentation can help you identify tomato diseases on your farm or in your garden.

Egel, Dan. 2012. Five Steps for Healthy Garden Tomatoes. Purdue University Extension. BP-184W.

Egel, D.; Jaiswal, A.K.; Abdelrazek, S.; and Hoagland, L. 2019. Managing Diseases of Tomato in the Midwest Using Organic Methods. eOrganic article.

McKenzie, Laurie. 2014. How to Breed Tomatoes for Organic A griculture. Organic Seed Alliance.

McKenzie, L. and Zystro, J. 2021. Tomato Seed Production Guide. Organic Seed Alliance.

variety trial reports logo Organic Variety Trial Database Tomato Reports.

Journal Articles, Dissertations and Master's Theses

Carvallo Lopez, A. 2025. From field to genetics: exploring disease resistance and flavor in organic tomato breeding. Plant Breeding and Plant Genetics. University of Wisconsin-Madison. Dissertation.
Carvallo Lopez, A., M. McCaslin, and J. Dawson. 2025. The sls-1 and sls-2 Genes Confer Significant Resistance to Septoria Leaf Spot (Septoria lycopersici L.) in Organic Field-Grown Tomatoes (Solanum lycopersicum). Plant Breeding 144, no. 5: 705714.
Carvallo Lopez, A., Nix, M., Hickey, T., and Dawson, J. C. 2024. Improved Tomato Breeding Lines Adapted to Organic Farming Systems Have Enhanced Flavor, Yield, and Disease Resistance. HortScience 59(9), 1299-1307.
Egel, D.; Hoagland, L.; Davis, J.; Marchino, C.; and Bloomquist, M. 2019. Efficacy of Organic Disease Control Products on Common Foliar Diseases of Tomato in Field and Greenhouse Trials. Crop Protection, 122, p. 90-97.
Hoagland, L., Colley, M., Dawson, J., Davis, J., Egel, D., Gu, S., Myers, J., Zystro, J., 2018. Tomato management and improvement project (TOMI): An interdisciplinary approach to managing foliar pathogens in tomato. Acta Horticulturae 1207:203-210.
Hoagland, L., Navazio, J., Zystro, J., Kaplan, I., Gomez Vargas, J., Gibson, K., 2015. Key traits and promising germplasm for an organic participatory tomato breeding program in the U.S. Midwest. HortScience 50(9):1-8
Jaiswal, A., Mengiste, T., Myers, J., Egel, D., Hoagland, L., 2020. Tomato domestication attenuated responsiveness to a beneficial soil microbe for plant growth promotion and induction of systemic resistance to foliar pathogens. Frontiers in Microbiology. Doi: 10.3389/fmicb.2020.604566J
Kemble, J.M., senior editor. (multiple authors from the Southeast, including J.M. Davis) 2023. Southeastern US Vegetable Production Handbook.
Luis, M., Jaiswal, A., Mengiste, T., Myers, J., Hoagland, L., 2025. Deciphering the mechanisms regulating variability in induced systemic resistance among tomato genotypes. Phytopathology DOI: 10.1094/PHYTO-07-24-0240-R
Luis, M., Johnson, L.D., Vega-Vasquez, P., Ristroph, K., Hoagland, L., 2025. Use of cinnamon essential oil nanoemulsions to manage gray mold in tomato. Plant Disease DOI: 10.1094/PDIS-02-25-0261-RE
Richardville, K., Egel, D., Flachs, A., Jaiswal, A., Perkins, D., Thompson, A., & Hoagland, L. A. 2022. Closing the loop in the city: Leaf mold compost reduces waste, improves soil and microbial properties, and increases tomato productivity. Urban Agriculture & Regional Food Systems, 7:e220022. https://doi.org/10.1002/uar2.20022
Richardville, Kyle. 2020. Overcoming Barriers in Urban Agriculture to Promote Healthy Eating on College Campuses. Master's Thesis, Purdue University.
Richardville, K., Egel, D., Flachs, A., Jaiswal, A., Perkins, D., Thompson, A., Hoagland, L., 2022. Leaf mold compost reduces waste, improves soil and microbial properties, and increases tomato productivity. Urban Agriculture and Regional Food Systems. doi.org/10.1002/uar2.20022.
Zhang, C. (Purdue, Biology Dept.) January 2019-August 2020 Project: Changes in rhizosphere microbial community structure and susceptibility to foliar pathogens in tomato grown in different organic potting media. Dissertation.

Conference Proceedings Papers

Carvallo, A. 2024. Selection vegetale participative, experience d'amelioration de la tomate dans le Haut Midwest des Etats-Unis. Seminaires Saint Maurice, GAFL, INRAE.
Egel, D., Myers, J., Hoagland, L., 2018. Microbial hitchhikers on seed: friend or foe? Proceedings from the 9th Organic Seed Growers Conference, Corvallis, OR. pp. 54-57
Feiler, E., Sanchez, M., Hoagland, L., 2023. Relationship between compost microbiome and induction of induced systemic resistance in tomato. Agronomy, Crop Science, Soil Science Societies International Meeting, St. Louis, MO.
Hoagland, L., 2015. Breeding for beneficial plant-microbial relationships: how do we get there? Eucarpia workshop on implementing plant-microbe interaction in plant breeding, Weihenstephan, Germany pp. 23-24.
Hoagland, L., Blevins, M., Bloomquist, M., Carvallo, A., Coffey, P., Colley, M., Davis, J., Davis, J., Dawson, J., Dubey, S., Egel, D., Feiler, H., Formiga, A., Gu, S., Hickey, T., Jaiswal, A., Landgraver, E., Learn, K., Luis, M., McCluskey, C., Mengiste, T., Myers, J., Nix, M., Peery, J., Qu, L., Raturi, A., Salinas, C., Selman, L., Zystro, J., 2024. 10 years of TOMI: What we've learned that can help reduce foliar disease in tomato. Crop, Agronomy, Soil, and Environmental Science Societies (CANVAS) International Meeting, San Antonio, TX.
Hoagland, L., Bloomquist, M., Colley, M., Davis, J., Dawson, J., Egel, D., Formiga, A., Fulk, R., Gu, S., Jaiswal, A., McCluskey, C., McKenzie, L., Mengiste, T., Myers, J, Qu, L, Zystro, J., 2021. Tomato Organic Management and Improvement (TOMI) Project. Proceedings Organic World Congress, Rennes, France.
Hoagland, L., Davis, J., Davis, J., Dawson, J., Denny, A., Dubey, S., Feiler, H., Formiga, A., Garcia, E., Gu, S., Hickey, T., Landgraver, E., Learn, K., Luis, M., Myers, J., Nix, M., Qu, L., Raturi, A., Salinas, C., Smith, B., Selman, L., Zystro. J., 2025. The tomato organic management and improvement (TOMI) project: helping tomato growers better manage foliar diseases. American Society of Horticultural Science Annual Meeting, New Orleans, LA
Hoagland, L., Navazio, J., Cerruti, N., Kaplan, I., Maynard, L., and Gibson, K., 2014. Selecting regionally adapted fresh-market tomato varieties for organic production systems in the Midwest U.S. Proceedings from the 7th Annual Organic Seed Growers Conference, Corvallis, OR. pp. 47-48.
Jaiswal, A, Hoagland, L., 2020. Does domestication impact the metabolome and microbiome of tomatoes? American Society for Microbiology Annual Meeting, Chicago, IL
Myers, J., Zystro, J., Hodge, T., Dawson, J., 2018. Taking tomatoes totally organic. Proceedings from the 9th Organic Seed Growers Conference, Corvallis, OR. pp 32-39