You are here

MH, DMN and spearmint oil favoured by Dutch & German potato stores

Publication Date: 
15 May 2019
Author/Contact :
Laura Bouvet

The Sutton Bridge team of specialists made a trip to the Netherlands and Germany last month to see European processing stores in action and find out more about how they deal with sprout control. The packed schedule included store visits kindly arranged by colleagues from BASF, Certis and Mooij Agro who had attended the recent EAPR conference in Norwich (see last month’s bulletin for EAPR story).

Virtually all the stores visited by the team used a combination of treatment strategies to control sprouting. A common strategy was the use of  maleic hydrazide (MH) in the field followed either by a treatment of 1,4-dimethylnaphthalene (DMN) or spearmint oil post-harvest. When using these new sprout suppressants stores are left sealed for longer following application, usually 24 to 48 hours. According to the store managers, these strategies did not appear to be having an effect on processing quality.

Varieties with long dormancy characteristics e.g. Agria, Fontane and VR808 were widely used in the stores visited, reducing the need for chemical treatment. In some cases, cooler temperatures were used for long-term storage, while in others ambient air ventilation was reduced compared with more conventional approaches in order to retain the sprout suppressant.

This 4000 tonne store in Germany used a combination of a long dormant variety (Fontane), temperature control & chemical treatment with maleic hydrazide in the field plus 160 ml/t of spearmint oil post-harvest.

While there are differences in the way these stores were being managed, most of the strategies observed during the visit can undoubtedly be applied in UK stores (subject to DMN approval).  Interestingly, none of the businesses visited considered their ware stores suitable for ethylene to control sprouting.

The visit ultimately demonstrated that storing for processing without CIPC is possible on a commercial scale – but not exactly as we know it here in the UK at the moment.

How useful did you find this information?
Only logged in users can vote. Click on a star rating to show your choice, please note you can only vote once.
No votes yet