Tomato rot / brown rot
Tomato blight is a plant disease in which the tomatoes and leaves turn brown and drop prematurely.
Yoghurt helps here!
Dissolve 1-2 tablespoons of natural yoghurt in 5dl of cold water and spray the plant with it. Important: Treat the leaves also from below!
The disease is thus stopped and apparently the lactic acid bacteria also provide some protection against re-infection. Possibly. Repeat after a few weeks if new brown spots appear.