What is wrong with my Tomatillos, Tomatoes, Basil, and Peppers?
The seedlings were doing great for 6 weeks. Many were 6 inches high and 4-6 inches wide. Healthy dark green everywhere. Within 3 weeks many plants developed spots and the leaves eventually turn black and fall off. Some of the leaves curl under. I isolated some of the plants to under-water some and give a little extra water to others - but there was no difference in outcome between the groups. An autopsy reveals what appear to be healthy roots. The stems are not hollow and do not appear slimy or unusually discolored.
Ramsey County Minnesota
So sorry, that is very disappointing when it happens. They have a fungal infection. Neem oil is an effective fungicide. Garden centers have fungicides for vegetable plants and the far from harvest they are safe to use if one follows directions and hand washing. Cinnamon can also be used with some success. It can also burn leaves. One thing to do to help prevent this next year is to stir the air over the plants with a small fan. Using a fan to create air movement also helps make seedlings stronger. Isolating the plants with symptoms away from those without is also important.