Stemphylium Gray Leaf Spot: A “New” Tomato Disease for Maine
By Caleb P. Goossen, Ph.D., MOFGA’s Crop Specialist I have been getting more and more photos sent to me from tomato growers showing symptoms of a foliar disease that never used to be present in Maine. Though the disease was only formally confirmed to be Stemphylium gray leaf spot in the 2024 growing season, I