Dr. Sally Miller and her diverse team focus on the biology and management of bacterial, fungal, oomycete, mollicute and nematode diseases of fresh and processing vegetables. Dr. Miller’s program strives to develop sustainable and ecologically friendly management practices that benefit the environment, the grower and consumer.  It encompasses management strategies for conventional, transitional and organic production to assist clients in Ohio, nationally and internationally. Through Dr. Miller’s innovative teaching and extension outreach programs she is providing instruction and personal attention so that every client and student can thrive.  We invite you to explore our website and contact us if you need support!

2021 Lab (+ Dr. Anna Testen, USDA ARS Research Scientist) Left to right: Ram Khadka (Graduate student), Sally Miller (Distinguished Professor and State Extension Specialist, seated),  Angie Nanes (Research Assistant), Anna Testen, Josh Amrhein (Research Assistant), Francesca Rotondo (Research Associate),. Not pictured: Hellen Kanyagha (Graduate student) and Alex Taylor (Undergraduate intern).

Contact Us:
The Ohio State University Wooster Campus
Department of Plant Pathology, Selby Hall
1680 Madison Ave
Wooster, OH 44691
Phone: (330) 263-3838
Fax: (330) 263-3841

Dr. Sally Miller – 330-263-3678; 330-466-5249 (mobile)


The OSU Vegetable Pathology Lab carried out an active field research program in 2021, with ten full field trials spread across three research sites in Wooster, Celeryville and Fremont, OH, and three bioassays for downy and powdery mildew management. We tested fungicides, biological control products, and disease-resistant varieties to manage diseases of tomatoes, peppers, cucumbers, pumpkins, cabbage and collards. Our vegetable disease diagnostic lab service for commercial growers, led by Dr. Francesca Rotondo, diagnosed 241 physical samples and 20 digital samples for Ohio growers at no cost. You can click here Plant Pathology Series 2022_Veg Pathology Research Rpts 2021_final to read the research trial and diagnostic lab reports. Most of these trial results will be published in 2022 in Plant Disease Management Reports (subscription required).

Research projects (those with an * were supported financially by the Ohio Small Fruit and Vegetable Research and Development Program):

*Tomato anthracnose – fungicide evaluation

Tomato black mold, Septoria leaf spot and anthracnose – fungicide evaluation

Pepper bacterial canker – evaluation of cultivar resistance

Pepper Pseudomonas leaf spot – evaluation of cultivar resistance

*Pepper anthracnose – fungicide evaluation

Cucumber downy mildew – evaluation of cultivar resistance

Cucumber downy mildew – fungicide resistance screening (bioassay)

*Pumpkin powdery mildew and Plectosporium blight – fungicide evaluation

*Pumpkin powdery mildew – fungicide resistance screening (bioassay)

*Pumpkin powdery mildew – OMRI-listed products evaluation (bioassay)

Cabbage Alternaria leaf spot and soft rot – fungicide and biological product evaluation

Cabbage white mold – fungicide and biological product evaluation

Collards black rot and peppery leaf spot- biological product testing

*Vegetable disease diagnostic report