Te Rokiroki Rīwai me te Kore CIPCHe aha i hiahiatia ai he pūnaha katoa mō te whakahaere pihi

Why storage practice must change

The withdrawal of chlorpropham (CIPC) in parts of Europe has increased interest in alternatives for long-term potato storage. No single treatment can replace good crop management. Variety, market destination, physical damage, storage temperature and ventilation all determine the outcome.

Nga huarahi rereke

AHDB research has reviewed options including ethylene, 1,4-dimethylnaphthalene (DMN), maleic hydrazide and essential oils. Their authorisation varies by jurisdiction. Ethylene can suppress sprout elongation, but processing cultivars may respond with changes in sugar metabolism that affect fry colour. Independent, variety-specific evaluations are essential.

Temperature, airflow and crop condition

Low temperatures can reduce sprouting but may increase reducing sugars in potatoes destined for frying. Ventilation must prevent temperature differences and condensation. Relative humidity, carbon dioxide and tuber temperature should be monitored as part of the control programme. Harvest damage, skin set and wound healing influence losses long before any suppressant is applied.

Calculate marketable output

A higher selling price after storage does not automatically mean a higher return. Evaluation must include shrinkage, rejects, energy, chemicals, labour, financing and quality penalties. The meaningful result is the quantity and value of marketable potatoes delivered.

Rauemi

AHDB research and technical guidance on CIPC alternatives, ethylene and potato storage: https://ahdb.org.uk/ . Product registrations must be checked against current national rules.