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Gail E. Ruhl

Botany and Plant Pathology 

  • Senior Plant Disease Diagnostician

Awards & Honors

(2013) 2013 Purdue Agriculture TEAM Award. Purdue College of Agriculture.

(2013) ASA Extension Excellence award for a digital decision aid. American Society of Agronomy (ASA).

(2013) Midwest Regional Turf Foundation Award of Achievement. Midwest Regional Turf Foundation.

(2012) 2012 PUCESA Team Award: Imprelis Herbicide Injury Response Team. Purdue University Cooperative Extension Specialists Associaton (PUCESA).

(2009) Outstanding Service in Global Relations. Epsilon Sigma Phi ; Alpha Lambda Chapter;ESP Globalization Committee.

(2015) 35 Years of Service. Purdue University.

(2012) APS Excellence in Extension Award. American Phytopathological Society (APS).

(2010) 30 Years Service to Purdue. Provost Recognition Luncheon.

(2010) Managing Moldy Corn Extension Team. 2010 PUCESA Team Award.

(2005) Soybean Rust Team Award. PUCESA.

Selected Publications

Egel, D., Hoke, S., Dicklow, M., & Wick, R. (2010). First Report of Black Leg of Hydroponic Basil in the United States Caused by Plectosporium tabacinum. Plant Disease, 94(4), 484.2 - 484.2. Retrieved from

Wise, K., Creswell, T., Leonberger, A., & Speers, C. (2009). First Report of Goss's Bacterial Wilt and Leaf Blight on Corn Caused by Clavibacter michiganensis subsp. nebraskensis in Indiana. Plant Disease, 93(8), 841. doi: 10.1094/PDIS-93-8-0841B

Beckerman, J., & Ruhl, G. (2007). Phytophthora citricola causes a canker on Walnut. Plant Health Progress.

Crime Scene Investigation (CSI) with Powdery Mildew Fungi. (2004). The Plant Health Instructor, 1. doi: 10.1094/PHI-k-2004-0330-02

Ruhl, G. (2003). Fusicladium levieri, a fungal parasite of persimmon, found in Indiana. Proceedings of the Indiana Academy of Science, 112(2), 132-134.

Ruhl, G., & Jasalavich, C. (2002). Powdery Mildew Fungi:Classification and Ecology. The Plant Health Instructor, DOI:10.1094/PHI-K-2002-0125-01. Retrieved from

Holmes, G., & Brown, E. (2000). What's a Picture Worth? The Use of Modern Telecommunications in Diagnosing Plant Diseases. Plant Disease, 84(12), 1256-1265. doi: 10.1094/PDIS.2000.84.12.1256

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. Plant Disease, 100(4), 860. Retrieved from

Abbasi, M., Aime, M. C., Ruhl, G., & Creswell, T. C. (2016). First Report of the Smut Fungus Ustilago sieglingiae on Purple Sandgrass (Triplasis purpurea) from Indiana. Plant Disease, 100(2), 536. Retrieved from

Rivera, Y., Creswell, T. C., Ruhl, G., & Crouch, J. A. (2015). First report of Downy Mildew caused by Plasmopara halstedii on the Native Rudbeckia fulgida Aiton var. speciosa (Wender.) Perdue in Indiana. Plant Disease, 99(9), 1278. Retrieved from

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

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