Potato Council head of research and development Dr Mike Storey said: "It shows we must be doing something right but we need to keep going with the efforts and impetus for the stewardship campaign as this year's storage season develops."
Group member and Certis technical manager Dr Tudor Dawkins said: "We are keen to emphasise the importance of using CIPC in a manner consistent with best practice.
"The end of this year's harvest saw crops being brought into store in wet conditions with a lot of soil present, which presents sprouting risks - but storage is still possible without exceeding CIPC limits."
The maximum residue level is 10mg per kg, with maximum application rates set at 36g ai/tonne and 63.75g ai/tonne for fresh table top and processing crops respectively.
Dawkins added: "Dose rates should reflect the conditions of the potatoes in the store and the proposed storage period."
- For further details, see www.potato.org.uk/cipc.