Late blight

What you see

Dark water-soaked patches on leaves with pale green halos; white mould fuzz underneath in humid mornings; brown lesions racing down stems; fruit and tubers rot.

Conditions

Warm humid spells with wet nights - Atlantic summer weather. Can destroy a tomato patch in a week.

Treatment

Cut out infected growth immediately and bin it (never compost); copper slows spread on what remains; harvest sound fruit early.

Prevention

Preventive copper before humid spells; water at soil level in the morning; space widely for airflow; never plant near last year's potatoes.

Months: not recorded

Plants

Tomato

Remedies

Not recorded — the field is blank rather than guessed.

The thing people get wrong

Not recorded — the field is blank rather than guessed.