Several diseases can affect tobacco seedlings in float beds. These include anthracnose, blue mold, collar rot, pythium root rot, damping off (soreshin), blackleg, and target spot. Pythium root rot and target spot usually are the most common. Let’s look at pythium root rot today.
Pythium Root Rot can appear at any stage of transplant production, this disease normally appears when water temperatures consistently exceed 65 degrees. The first visible symptoms of Pythium root rot tend to be yellowing and stunting of transplants in a well-defined area or areas.