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Janna L Beckerman

Botany and Plant Pathology 

  • Professor
Lilly Hall Room 1-321

Dr. Beckerman’s primary responsibility at Purdue University is to lead the plant pathology extension education effort in horticultural crops by developing and enhancing a close working relationship between the University, extension educators, and members of the fruit and ornamentals industries, and the developing hemp industry. There are two major approaches to managing plant disease in horticultural crops: Incorporating disease resistance, when possible, and utilizing fungicides, when necessary. The goal of my extension program is to enable commercial growers to effectively and sustainably manage both chemical (fungicide) and genetic (disease resistance) resources while protecting the environment. To this end, research in Dr. Beckerman’s lab includes:


As part of her extension program, she has developed (with Dr. Cliff Sadof, Entomology) a series of four apps, to assist homeowners in the diagnosis and management of landscape plants, and tomatoes.  these apps work for both the iOS and Android platforms.  For more information see 



Awards & Honors

(2012) PUCESA Team Award: Imprelis Herbicide Injury Response Team. Purdue University.

(2011) Richard L. Kohls Early Career Award. Purdue University.

(2010) Richard L. Kohls Early Career Award. Purdue University.

Selected Publications

Mitchell, K., French, E., Beckerman, J. L., Iyer-Pascuzzi, A., Wahlman, J. R., & Gibson, K. D. (2018). Biochar Alters the Root Systems of Large Crabgrass. HortScience, 53(3), 354-359. doi:10.21273/HORTSCI12690-17

Bordelon, B. P., Beckerman, J. L., & Foster, R. E. (2017). Midwest Fruit Pest Mangement Guide 2017. 180. Retrieved from

Wilson, A., Beckerman, J. L., & Aime, M. C. (2016). First report of the white pine blister rust fungus, Cronartium ribicola, on Ribes odoratum, in Indiana. 98(2), 277. Retrieved from

Sandler, L. N., Beckerman, J. L., Whitford, F., & Gibson, K. D. (2019). Cannabis as conundrum. Crop Protection, 117, 37-44. doi:1016/j.cropro.2018.11.003

Beckerman, J. L., Nisonson, H., Albright, N. C., & Creswell, T. C. (2017). First report of Pythium aphanidermatum crown and root rot of industrial hemp in the United States. Plant Disease, 101(6), 1038. doi:10.1094/PDIS-09-16-1249-PDN

Creswell, T. C., Ruhl, G., Aime, M. C., Beckerman, J. L., & Abbasi, M. (2016). First report of rust disease of Bradford Pear caused by Gymnosporangium clavipes. Retrieved from

Beckerman, J., Sundin, G., & Rosenberger, D. (2015). How IPM contributed to the current fungicide resistance crisis in apple management. Pest Management Science, 71, 331-342. Retrieved from

Bordelon, B. P., & Beckerman, J. L. (2016). Midwest Fruit Pest Management Guide. Retrieved from

Beckerman, J., & Creswell, T. (2014). First Report of Brown Rot (Monilinia fructicola) on the Dogwood, Cornelian Cherry (Cornus mas) Plant Disease, 9, 1275.

Beckerman, J. L., Goodwin, S. B., & Gibson, K. D. (2014). The threat of hybrid Phytophthoras. RMRS(P), 72. Retrieved from

Botany and Plant Pathology, 915 West State Street, West Lafayette, IN 47907 USA, (765) 494-4614

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