Monday, April 23, 2018

Potato stocks up during first season for lower CIPC rates

April 3, 2018 by  
Filed under Crops

Growers are urged to ensure continuing use of active recirculation in stores in line with new label requirements to reduce usage of chlorpropham as a sprout suppressant.

New statutory limits for total doses during the 2017-18 storage season are 36 grammes per tonne for processing – including fish and chip shop supplies and peeling – and 24g/t for the fresh market. These must not be exceeded.

Approved by Chemicals Regulation Directorate (CRD), the maximum individual dose is reduced to 12g/tonne. The latest time of application is 14 days before removal from store for sale or processing and is a statutory requirement.

Additionally, compliance with stewardship best practice – endorsed by the National Association of Agricultural Contractors CIPC Applicator Group and Red Tractor Farm Assurance – continues to allow just one application of up to 12g/t in cold stores.

This is because CIPC residue declines more slowly at low temperature – and it applies to all stores that will be held below 5°C. Applications should be made early in storage during pull-down, before the temperature is decreased below 7°C, for maximum efficacy.

Compliance

AHDB Potatoes head of resource management Mike Storey, who is also chairman of the potato industry CIPC Stewardship Group, said: “The companies that hold approvals have reduced rates, which helps ensure compliance with the Maximum Residue Level (MRL) of 10 mg/kg.”

Introduction of the lower rate has coincided with the highest level of potatoes stored for six years.  At the same time, a wet harvest has caused problems in stores but these do not appear to be in connection with the new CIPC rates.

AHDB Potatoes recently released their November stocks figure at 3.6m tonnes. This followed a growing season that saw a 5% increase in planted area to 122,779ha coupled with one of the highest average yields on record (49.3t/ha).

Russell Price, of Russell Price Farm Services, said: “There were some issues with rots developing in stores early in the storage season and we had to move some crop early.

“We have a plan to meet contracts and moving away from this can create a concern for growers in terms of store management, cash flow and our customer’s ability to take material early, which thankfully they were able to accommodate.

“Things seem to have settled down now and the crop is storing well. The CIPC seems to be working at the new rates and we’ve had no issues with early sprouting. It looks as if the crop will hold.”

The Maximum Residue Level for CIPC in anything other than potatoes is the limit of detection (0.01mg/kg). For further details on potato storage and CIPC rules, visit www.cipccompliant.co.uk.

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