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11140057 Alternative Sprout Suppressants (Fresh)

Publication Date: 
1 February 2019
Author/Contact :
Adrian Briddon

Contractor :
Sutton Bridge Crop Storage Research (SBCSR)

Full Title: Integrating alternative sprout suppressants for the fresh market
Duration: July 2018 to June 2021


Dormfresh, Xeda, Restrain, Arysta


Sprout control is critical to the year round supply of ware potatoes and the industry relies on Chlorpropham (CIPC), a relatively cheap and highly effective sprout suppressant. The active substance is up for registration renewal and the European Food Safety Authority (EFSA) has recommended no further renewal following a review. With no decision yet reached, CIPC’s future in the sprout suppressant toolbox is uncertain. Evaluating alternatives to CIPC is therefore crucial. The maximum dose has been reduced by 44% since stewardship began in 2008. There has been sustained pressure to reduce dosage and residues through regulation and stewardship. Even in the fresh market there has been significant reliance over many years on the use of CIPC. It has been used to support the refrigerated storage of crops especially in overhead throw stores where temperature alone has struggled to maintain quality due to the inherent variability of the design and a need to manage costs.

Aims and Approach

Aim: To investigate the relative efficacy of a range of alternatives to CIPC for use alone or in combination for sprout suppression in the storage of potatoes for the fresh market.

The sprout suppressants to be evaluated in this project are maleic hydrazide (MH), spearmint oil, orange oil, ethylene, 1-4 dimethylnaphthalene (DMN) and CIPC. Their efficacy in controlling sprouting in synergy are also being explored. The boxes will be positively ventilated with target holding conditions of 4.5°C. This research complements project (11140043) investigating the efficacy of alternative sprout suppressants for the processing market.

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