Alternaria leaf spot on cabbage
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