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Scientists had been predicting that PCN would wipe out Scotland’s seed potato industry by 2050.

The GB seed potato ban will also be partially revoked: trade between registered operators will be possible but not sales direct to consumers.

The HTA is also calling for the establishing of what it calls a British and Northern Irish Horticulture and Seed Potato Traders Forum to identify and work through the outstanding issues.

The seed potato ban will be revoked this autumn, as will a similar ban on so-called "high risk" trees and shrubs.

In December, the Canadian Food Inspection Agency said a national survey detected no potato wart in seed potato fields not already under surveillance.