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11140043 Alternative Sprout Suppressants (Processing)

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

Contractor :
Contractor: 
Sutton Bridge Crop Storage Research (SBCSR)

Full Title: Integrating alternative sprout suppressants for the processing market
Duration: July 2017 to June 2020

Collaboration

Dormfresh, Xeda, Restrain, Arysta

Background

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 potato processing sector is particularly reliant on CIPC for sprout suppression since tubers are stored at relatively warm temperatures (6-13°C) to maintain commercially acceptable fry colour in processed products. 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. This project builds on previous research work undertaken at SBCSR that explored ethylene as a suppressor of sprouting in tubers destined for the processing market. There has been sustained pressure to reduce dosage and residues through regulation and stewardship. The maximum dose has been reduced by 44% since stewardship began in 2008.

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 processing market.

The sprout suppressants to be evaluated in this project are maleic hydrazide (MH), spearmint oil, ethylene, 1-4 dimethylnaphthalene (DMN) and CIPC. Their efficacy in controlling sprouting in synergy are also being explored. The varieties Innovator, VR808, Royal, Performer and Maris Piper are stored at 9 °C and assessed for sprouting and frying colour at 3, 6 and 9 months intervals. This research complements project (11140057) investigating the efficacy of alternative sprout suppressants for the processing market.

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