Although the seed corn maggot is seen in some fields every year, it appears to have affected more crops in 2010.
Fears have now been voiced that seeds could fail and yields may be reduced.
Cool, wet soil is thought to be behind the increased infestation.
The news is likely to come as a blow to potato farmers, many of who are already fighting wireworms in fields that were formerly perennial grasses.
.@AHDB_Potatoes' first provisional estimate of total production in GB for the 2016 crop year is 5.22 million tons… https://t.co/ObUrB3sLza
Asia-Pacific Is the Fastest-growing Region in the Industrial #Starch Market, according to @marketsmarkets… https://t.co/fVYO9xUnsz