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Storage Bulletin - February 2013

Publication Date: 
14 February 2013



Updated information (July 2013) in italics

Industry is currently awaiting feedback from the Advisory Committee on Pesticides’ Review of CIPC stewardship, now scheduled for late September 2013
This process has involved the submission of reports from the Potato Industry CIPC Stewardship Group and the CIPC Approval Holders which were delivered into CRD at the end of January.
The Stewardship Group has reported on the delivery of the 5year action plan and the submissions have also put forward proposals to address an on-going concern with exceedance of the maximum residue level in a small number of monitoring samples taken by the Defra Expert Committee on Pesticide Residues in Food (PRiF).
Some of those proposals require regulatory approval and so cannot yet be confirmed but may require some significant changes in storage practices in relation to CIPC use. 
Additionally, the next round for EU re-registration of CIPC which will come into force in mid-2017, irrespective of the ACP Review, will require adoption of the European maximum CIPC dose of 36 g/t.
As it will take a bit of time before the ACP’s decisions are known and some stores may already be loaded and treated, the Potato Industry CIPC Stewardship Group has agreed interim information to go on to the advisory section of product labels to minimise the risk of MRL exceedance in 2013/14. See for further details.
Suffice to say that changes are probable and any measures which look to improve the uniformity of CIPC distribution in store will be beneficial in future seasons. Of these, the adoption of fan-assisted application in bulk stores (usually with the fitment of inverters to slow fans down) is the most widely tested.
Measures in box stores have been evaluated but require further work before firm recommendations can be made. The formation of plenums or covered walkways in stacks for application is current best practice. Fan assistance has not been proven to improve these. Other measures to improve the uniformity of air (and fog) circulation, such as the fitment of air dividers to overhead-throw stores, are likely to  enhance performance but data on their effectiveness to control the risk of CIPC exceedance are not available at present. If in doubt, current advice is to wait before making significant changes to box stores.
Sutton Bridge CSR, with the collaboration of Stewardship partners, is planning a series of summer roadshows in July which will include providing you with more information on the way forward with CIPC use. Further details of dates and venues will be announced in due course. In the meantime, please feel free to contact us to discuss your specific situation using the details below:
Further information
FREE storage advice 0800 02 82 111


At this time of year, there is always the prospect of skin spot rearing its head especially on crops harvested late from cold and wet fields. The latter will, following last year’s unprecedented harvest, sound familiar to many of you, so please take a close look at your crops in store - especially if you store a skin spot susceptible variety such as King Edward or Lady Rosetta. The best way to identify the disease is to wash a sample and look closely for the characteristic pimple-like lesions that form on the skin (right). The blemish is unsightly for crops destined for pre-packing but is also a threat to both seed and processing crops. The lesions can lead to blindness in seed and, over time, as they increase in depth, can significantly increase peeling loss in processing.


Please register in advance if you wish to attend. Full details at or call Miya Kotecha on 024 76 8782.

PCL Storage Forums

These two events offer you the opportunity to engage with the AHDB Potatoes team working on your behalf to improve storage quality, efficiency and cost-effectiveness for your business.
Tuesday 26 February  Windlestrea Hotel, The Muirs, Kinross, Perthshire, KY13 8AS
Includes presentations by Ian Toth of James Hutton Institute on blackleg and Adrian Cunnington of SBCSR on storage efficiency.
Thursday 28 February   Sutton Bridge Crop Storage Research, Lincolnshire, PE12 9YD
Includes talks by SBCSR’s Glyn Harper and Adrian Briddon on blackleg and CIPC respectively.
Both events have sessions to ‘have your say’ on AHDB Potatoes’s storage R&D and knowledge transfer programmes. They also feature a series of interactive workshops on important storage-related topics, including a review of the challenges of 2012 and how they could be better addressed; seed storage & disease control and alternative sprout suppressants.
Herefordshire Potato Day
Tuesday 6 March, Royal National College for the Blind, College Road, Hereford, HR1 1DT
Includes storage presentations on CIPC by Adrian Briddon & blackleg by Glyn Harper, both of SBCSR
British Potato 2013
Wednesday/Thursday 27/28 November, Gt Yorkshire Showground, Harrogate, Yorks.
Date for the diary. FREE visitor entry. Exhibitor bookings now being taken. See


International Potato Processing & Storage Convention 2013
4 – 6 June, Philadelphia, USA. See
European Association for Potato Research, Post-Harvest Section Meeting
22 – 24 October, Warsaw, Poland. EAPR bursaries available for young researchers to attend.

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