Quality issues are continuing to haunt kiwifruit growers, with marketer Zespri informing orchardists the problem is now worse than first anticipated.

In a letter sent to growers on Friday, Zespri chief executive Dan Mathieson says quality issues kept building as the 2022 kiwifruit season drew to a close.

"Demand for our fruit has remained as expected and we completed the 2022 season in line with previous years. However, we have seen further deterioration in the fruit quality of our final vessels, particularly in the final shipments of our Green varieties into Europe and Asia."

Dan says at the time of its previous forecast, fruit loss in Europe was estimated at about seven per cent for the last quarter of 2022, but that estimate has now been revised to about 20 per cent.

"Quality claims from customers are also estimated to be nearly three times the level we experienced in 2021, and more significant than anticipated in the prior forecast."

Higher fruit loss in New Zealand means Japan is undersupplied by more than a million trays, with poorer fruit quality than anticipated in Japan also impacting Zespri's market mix, says Dan.

Due to these problems, Zespri plans to downgrade its payments to green kiwifruit growers, likely by more than 60 cents per tray for Green and 50 cents for Green Organic growers, although that was still subject to finalisation.

This will have a significant impact on returns for green kiwifruit growers, he says.

"We understand how tough this will be for growers at the end of what has been a very hard year.

"This is not the sort of news that any of us wanted to start the year and it is a further reminder of the importance of addressing our fruit quality given the amount of value we have lost through quality costs."

Dan says it's positive that despite the quality issues, it has continued to see demand for Zespri fruit.

-RNZ.