Fulvia fulva

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Fulvia fulva (= Passalora fulva) symptoms on tomato leaf (click on image to enlarge it)
Author(s): Elizabeth Bush, Virginia Polytechnic Institute and State University
Source: IPM Images

Fulvia fulva (Cooke) Cif. 1954 - (tomato leaf mould)

This fungus is widespread and causes leaf mould on tomato. No other hosts are known. The disease often result in significant yield losses which can exceed 50%.

The symptoms include pale yellow spots and mouldy, olive-green to greyish mycelial growth on the lower leaf surfaces. The lesions enlarge, join and infected leaves eventually wilt and die. For management, excessive humidity should be avoided in greenhouses. Resistant cultivars are important. However, new races often appear which overcome such resistance.

The conidiophores are less than 100 µm long and sometimes branched near the base. Conidia are formed in chains and have variable sizes and shapes, typically cylindrical to ellipsoid, around 20-30 x 5 µm, with 0–3 septa.

Vernacular names
• Deutsch: Braunfleckigkeit der Tomate
• English: tomato leaf mould
• Español: cladosporiosis del tomate
• Français: cladosporiose de la tomate

Synonyms:
Cladosporium fulvum
Mycovellosiella fulva
Passalora fulva