Hurricane Dean has decimated banana plantations in the Windward Islands, which supply Fairtrade bananas to many of Britain's major multiples.
Reports from the Caribbean islands suggest 60% of the total crop has been destroyed, rising to as much as 90% in Dominica.
The Windward Islands Banana Exporting Company has vowed to continue exporting to the UK by sourcing Fairtrade bananas from elsewhere in the region. "Hurricane Dean has dealt a heavy blow to the Windwards banana industry," said analyst Christopher Stange.
"Supply-side constraints may have to be dealt with by purchasing bananas from the Dominican Republic to meet Fairtrade contracts."
Most of the banana growers in the Windwards had no crop insurance, and now face the loss of social premiums from Fairtrade sales worth £10m in the first half of the year.