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Gail E. Ruhl

Botany and Plant Pathology 

  • Senior Plant Disease Diagnostician

Awards & Honors

(2015) 35 Years of Service. Purdue University.

(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).

(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.

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

(2005) Soybean Rust Team Award. PUCESA.

Selected Publications

Rivera, Y., Creswell, T. C., Ruhl, G., & Crouch, J. A. (n.d.). First report of Downy Mildew caused by Plasmopara halstedii on the native Rudbeckia fulgida Aiton var. speciosa (Wender.) in Indiana. Manuscript in preparation.

Whitford, F., Martin, K., Lienhart-Cross, M., Nielsen, B., Bossaer, G., & Blessing, A. (2009). Effective Extension Presentations:Improving Communication Skills with Facts, Flair, and Fun. (PPP-81), 96.

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. Retrieved from DOI: 10.1094/PDIS-93-8-0841B

If you've seen it once... A dangerous metaphor for accurate diagnosis. (2009). 18-22. Retrieved from

Creswell, T., & Lopez, R. (2009). If YouŠ—Ève Seen It Once...A Dangerous Metaphor for Accurate Diagnosis. OFA Grower, 5. Retrieved from

Hodges, A., McKellar, M., Hoenisch, R., LaForest, J., & Beck, H. (2009). NPDN First Detector education: Traditional and multimedia training. 2009 APS Meeting Proceedings.

Wise, K., Creswell, T., Leonberger, A., & Speers, C. (2009). Occurrence and impact of GossŠ—Ès bacterial wilt and leaf blight on corn in Indiana. 2009 APS Meeting Proceedings.

Whitford, F., Martin, D., Lienhart-Cross, M., Nielsen, B., Bossaer, G., & Blessing, A. (2009). The EŠ—Ès of Extension Presentation. (PPP-82), 2.

Whitford, F., Martin, K., Lienhart-Cross, M., Nielsen, R., Bossaer, G., & Blessing, A. (2009). The Making of Effective Extension Publications. (PPP-81), 93. Retrieved from

Creswell, T. (2009). The Purdue Plant And Pest Diagnostic Lab: The Š—…DoctorsŠ—È Are In. 1. Retrieved from