Industry-standard fungicides and biofungicides can be vital tools to help tackle tomato leaf mould (Passalora fulva).
P. fulva infects via the stomata and lives inside the leaf tissue. Fungicides with translaminar or systemic action provide the most effective treatment option as they are able to penetrate the leaf and give better control.
Thorough coverage is essential when using purely contact-acting treatments. Contact fungicides are less effective.
It is essential to keep the top third of the plant as free from disease as possible as a severe attack here is most likely to affect yield.
The use of products from different fungicide groups should be incorporated into a resistance-management spray programme, as part of an integrated management strategy. Biofungicides need to be used preventatively; when used effectively, they have the capacity to have good effects on controlling several diseases, including tomato leaf mould, powdery mildew and botrytis.
Photo: EPPO (2024) EPPO Global Database. https://gd.eppo.int
Reference: https://horticulture.ahdb.org.uk/knowledge-library
