Deformed Potato's

[timmyalex]

Just spent the weekend digging up whats left of my earlies and in one raised bed i found large amounts of deformed potato's (Rocket variety). I remember now that last year i grew potato's in this bed. Could this be the cause and what is the deformity.?

[Paulottie]

Looks like scab to me, no lime in bed preparation and, indeed good crop rotation and constant moisture helps.

[rustylady]

Certainly looks like scab to me too, your soil is probably a bit alkaline. Some people recommend lining the planting holes with grass cuttings to help prevent scab