Main symptoms

Chlorotic spots appear on the upper surface of leaves attacked by Pseudocercospora fuligena , they are similar to those induced by Passalora fulva . At first pale yellow, they have an ill-defined outline (figures 1 to 4), extend and end up being covered with a spore-bearing down initially white, gradually turning to black (figures 5 and 6) as they grow. as sporulation occurs. Thus, large macules covered with a matt black velvety can sprinkle the leaf blade, at term, and be visible both on the upper and lower surface of the latter.

The extension of the spots and their confluence can lead to necrosis and drying out of more or less leaflets and leaves that will remain in place on the plants.

This fungus could also colonize the petioles , stems and peduncles of tomato fruits, at all stages of development.