Jennie Diehl Mazzone

Jennie Diehl Mazzone

  • Research Technologist/ Diagnostician/ Instructor
109 Buckhout Lab (Office)
216 Buckhout Lab (Vegetable Pathology Lab)
220 Buckhout Lab (Plant Disease Clinic)

University Park, PA 16802

Areas of Expertise

  • Plant Disease Diagnostics
  • Vegetable Pathology
  • Arboriculture


  • M.S., Plant Pathology Penn State (PSU), 2017
  • Dual- title program in International Agriculture and Development
  • B.S., Horticulture, Science Option, PSU, 2014
  • Minors: Plant Pathology; Sustainable Leadership; Biology
  • Schreyer Honors College

Professional Background

  • Plant Disease & Insect Diagnostician. Bartlett Tree Research Laboratory. Charlotte, NC, 01/2017-03/2019
  • Assistant Diagnostician. PSU Plant Disease Clinic. University Park, PA, 04/2013-08/2016
  • IPM Coordinator. PSU Greenhouses. University Park, PA, 08/2012-05/2014
  • Crew Leader. PSU Fruit Research and Extension Center. Biglerville, PA, 05-09/2011, 2012
  • Arboretum Technician. PSU. Mont Alto, PA, 01/2011-05/2012



Neupane, R.; Mazzone, J.D., Hoepting, C.A.; Gugino, B.K. (Aug., 2022). Identification and pathogenicity of bacteria isolated from symptomatic onion leaves and bulbs in Pennsylvania and New York in 2020 and 2021. American Phytopathological Society Annual Meeting, Pittsburgh, PA. 

Mazzone, J.D. and Gugino, B.K. (March, 2022). Evaluation of the susceptibility of thirteen sweet, Spanish onion cultivars to center rot in Pennsylvania, 2015 and 2016. Plant Disease Management Reports 16:V027. Available here.

Mazzone, J.D.; Mansfield, M.A.; Gugino, B.K. (Dec., 2016). Responding to growers' needs: Evaluation of management strategies for onion center rot, caused by  Pantoea ananatis and Pantoea agglomerans (thesis). PSU electronic thesis database. Available here.

Mazzone, J.D.; Mansfield, M.A.; Gugino, B.K. (Oct., 2016). Optimizing the timing and rate of nitrogen application to reduce center rot losses in PA. American Phytopathological Society Northeast Division Meeting, Ithaca, NY.

Mazzone, J.D.; Mansfield, M.A.; Gugino, B.K. (Aug., 2016). Identifying onion cultivars with reduced susceptibility to center rot. American Phytopathological Society Annual Meeting, Tampa, FL.

Mazzone, J.D. and Gugino, B.K. (Feb., 2016). Evaluating select management strategies for bacterial diseases of onion: Host resistance and nitrogen fertility. 2016 Mid-Atlantic Fruit and Vegetable Convention Proceedings, Pennsylvania Vegetable Growers Association, Richfield, PA. pp. 109-111.

Diehl, J. (2014). Integrated pest management (IPM) techniques for Moringa oleifera (Honor's thesis). Retrieved from Penn State Schreyer electronic Honors Thesis database. Available here