Potato growers are questioning estimates from the British Potato Council which indicate the crop is 13.4% lighter than last year.
The BPC pointed out that the estimate was based on two-thirds of planting returns up to June 25, and the figure would be updated again in September.
The present crop is looking good with few disease problems.
However, the weather during the rest of the summer would play an important part in the final analysis, said the BPC.