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Tomato leaf mould

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Time to act
Time to act

Do not Time to act in January

Do not Time to act in February

Do not Time to act in March

Do Time to act in April

Do Time to act in May

Do Time to act in June

Do Time to act in July

Do Time to act in August

Do Time to act in September

Do Time to act in October

Do Time to act in November

Do not Time to act in December

The fungus that causes this problem spreads rapidly in the warm, humid conditions of a greenhouse. It usually becomes apparent on the lowest tomato leaves from early or midsummer, which develop yellow blotches on the upper leaf surface. The leaves eventually turn brown and wither. If the problem isn’t tackled, tomato yields are lower and the fungus can overwinter in the greenhouse and persist the following year.

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Symptoms

Tomato leaves develop yellow blotches, then turn brown and wither. The crop might also be reduced.

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tomatoes

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Organic

Good ventilation in the greenhouse helps, with plants well spaced out. Avoid splashing the leaves when watering. Promptly remove and get rid of any infected leaves and destroy all the plants at the end of the season. Disinfect the entire greenhouse and choose resistant varieties such as ‘Dombello’ and ‘Shirley’.