Blight occurs when plants have been planted too close together with poor air flow
Water-soaked spots that spread into dark irregularly shaped pots with a yellow outline
Dark spots/damage on the stems causes the plant to rapidly wilt
Rotate crops; destroy infected garden debris.
Plant crops affected by blight at a reasonable distance with good airflow
There is not much that can be done once an infection is spotted â€“ apart from a swift harvest of unaffected produce, removal of whole plants and sanitary disposal of all foliage in household rubbish
If you add infected foliage to your compost heap you will spread infectious spores through your compost
In the case of potatoes, if you spot blight soon enough, you can remove all foliage and then wait a week before digging up the potatoes themselves underground â€“ they should still be edible