I have grown four varieties of eggplant from seed. They were fine until a few days ago. Now they are all getting a wavy, tan spotting on the leaves. The large and smaller leaves are being affected. No brand new leaves and irregular spotting that tends to run together on other leaves. It is spreading to all the eggplants, whether touching or not. I have them close together for the lighting. A fan moves some air. Cow pots were used and some had compost added to the potting soil. I am afraid it is a fungus and have started a cornmeal tea regimen. Please help with any info.
Eggplant Seedling Problem
Certified GKH Gardening Expert
It is a fungus, but there are several that it could be. The most likely culprit is early blight, which cannot be cured easily. This article tells more about early blight: https://www.gardeningknowhow.com/edible/vegetables/tomato/early-blight-alternaria-tomato-leaf-spots-yellow-leaves.htm
While the article focuses on tomatoes, eggplants are in the same family and are affected by the same diseases. I would recommend neem oil as an organic fugicide: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm