Jennie Diehl Mazzone

Professional Background

• Forestry Instructor, Penn State (PSU) Mont Alto. Mont Alto, PA 01/2023-08/2025.
• Master Gardener Coordinator, PSU Extension. Chambersburg, PA, 10/2024-06/2024.
• Research Technologist/Diagnostician/Instructor, PSU Plant Pathology and Environmental Microbiology. University Park, PA, 04/2019-10/2024.
• 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.

Courses

• FORT 220 Forest Ecosystem Protection- PSU Mont Alto
• FORT 210 Arboriculture- PSU Mont Alto
• BIOL 127 Introduction to Plant Biology- PSU Mont Alto
• PPEM 318 Diseases of Forest and Shade Trees- PSU University Park
• Online Extension- Pest and Disease Management for Landscape Plants

Publications

Neupane, R., Mazzone, J., Hoepting, C., Gugino, B. (July, 2025). A three-year bacterial survey of onion fields across Pennsylvania and New York. Plant Health Progress. 0:ja.

Yoon Shin, G., Asselin, J.A., Smith, A., Aegerter, B., Coutinho, T., Zhao, M., Dutta, B., Mazzone, J., Neupane, R., Gugino, B., Hoepting, C., Khanal, M., Malla, S., Nischwitz, C., Sidhu, J., Machado Burke, A., Davey, J., Uchanski, M., Derie, M., du Toit, L.J., Stresow, S. Bonasera, J.M., Stodghill, P., Kvitko, B. (Jan., 2025). Plasmids encode and can mobilize onion pathogenicity in Pantoea agglomerans. International Society for Microbial Ecology (ISME) 19:1. Available here.

Gugino, B.K. and Mazzone, J.D. (August, 2023). Evaluation of bactericides for the management of center rot in Pennsylvania, 2022. Plant Disease Management Reports 17:V145. Available here. 

Gugino, B.K. and Mazzone, J.D. (August, 2023). Evaluation of bactericides for the management of center rot in Pennsylvania, 2021. Plant Disease Management Reports 17:V146. Available here. 

Gugino, B.K. and Mazzone, J.D. (August, 2023). Evaluation of the effect of nitrogen rate and timing on the incidence of bacterial disease of onion, 2022. Plant Disease Management Reports 17:V148. Available here. 

Gugino, B.K. and Mazzone, J.D. (August, 2023). Evaluation of the effect of nitrogen rate and timing on the incidence of bacterial disease of onion, 2021. Plant Disease Management Reports 17:V147. Available here.

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.