Despite the COVID-19 pandemic in 2020, the OSU Vegetable Pathology Lab carried out an active field research program, with ten trials spread across three research sites in Wooster, Celeryville and Fremont, OH. We tested fungicides, biological control products, and disease-resistant varieties to manage diseases of tomatoes, peppers, cucumbers, pumpkins, cabbage and cilantro. We also kept our vegetable disease diagnostic lab service operating almost as usual, diagnosing 188 physical samples and 35 digital samples for Ohio growers at no cost. You can click here Plant Pathology Series 2021_Veg Pathology Research Rpts 2020 to read the research trial and diagnostic lab reports.

  • Tomato bacterial spot – chemical and biological product evaluation
  • Tomato anthracnose – fungicide evaluation
  • Pepper Phytophthora blight – fungicide program and grafting with Phytophthora-resistant rootstocks evaluation
  • Cucumber downy mildew – cucumber variety resistance assessment
  • Cucumber downy mildew – fungicide resistance screening
  • Pumpkin Plectosporium blight – fungicide testing
  • Cabbage black rot – biological product testing
  • Cabbage Alternaria leaf spot – fungicide and biological product evaluation
  • Cilantro bacterial leaf spot – chemical and biological product evaluation


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!



2019 Lab Left to right: Ram Khadka (Graduate student), Amilcar Vargas (Research Associate), Alex Taylor (Undergraduate intern), Deogracias Massawe (Graduate student), Madelyn Horvat (Research Assistant), Francesca Rotondo (Research Associate), Angie Nanes (Research Assistant),  Emma Piaget (Visiting Scholar),  Sally Miller (Professor and State Extension Specialist), Hellen Kanyagha (Graduate student), Josh Amrhein (Research Assistant).

Miller Lab 2020 – working through the pandemic


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)