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Pseudocercospora fuligena (Roldan) Deighton (1976)
The fungus is wide-spread and causes the black leaf mold disease of tomatoes in tropical and subtropical areas. The disease can cause epidemics in south-east Asia. During fungicide trials in Thailand, yield losses of around 30% have been determined (Mersha et al., 2014).
Symptoms start with small, poorly defined yellow lesions on both leaf surfaces. These are covered with white fungal growth which turns grey and black when the fungus sporulates. The lesions expand and join while the leaves curl upwards. Infected leaves wilt and drop prematurely.
Conidia are 4-5 µm wide and have a variable length of 10-100 µm with up to 10 septa. They can persist on infected leaves for several months.
|• Deutsch:||schwarzer Blattschimmel der Tomate|
|• English:||black leaf mold of tomato|
|• Português:||mancha-fuliginosa do tomateiro|