Firstly, choose varieties that have some resistance such as the Sarpo varieties. It’s wise to avoid very susceptible varieties such as ‘Arran Pilot’ and ‘King Edward.’ The British Potato Variety Database is a good point of reference.
Grow first early varieties as they tend to escape the disease.
Earthing up potatoes as they grow can provide some protection but is not fail safe.
Removing infected leaves when first spotted could help save the crop and delay spread of the disease. However, this won’t remove the disease.
If more than a quarter of the leaves on the plant are diseased remove all the leaves, cutting them down close to the soil level. Remember to not put them on the compost heap. Instead place them in the recycling bin.
Dig up the tubers from the plants where the leaves have been removed about two weeks afterwards and use in priority to non-diseased potatoes. It’s best to avoid storing them.
Rotate the beds in which you grow your potatoes on a four-year crop rotation cycle.
Do not leave any potatoes in the soil.
There are currently no chemical controls available for use by the home gardener.