What does blight look like on a tomato plant?
Symptoms of Early Blight on TomatoesOn Older Plants: Dark spots with concentric rings develop on older leaves first.
The surrounding leaf area may turn yellow.
Affected leaves may die prematurely, exposing the fruits to sun scald.
Dark lesions on the stems start off small and slightly sunken.
How do I identify a tomato disease?
Identifying Tomato Plant Diseases –
Why do my tomato plants have spots on the leaves?
Septoria leaf spot, also called Septoria blight, is a very common disease of tomatoes. It is caused by a fungus (Septoria lycopersici) and can affect tomatoes and other plants in the Solanaceae family, especially potatoes and eggplant, just about anywhere in the world.
How do you treat tomato plant disease?
Treatment: Try to prevent early blight by planting disease-resistant cultivars, pulling weeds and volunteer tomato plants, rotating crops, spacing plants so that they do not touch when mature, mulching and fertilizing properly and avoiding watering foliage with irrigation water.