Samoa's ministry of agriculture and fisheries has warned people travelling to New Zealand to make sure that any flax products they wish to take on their trip have been treated.
The ministry's quarantine division says fine mats and other woven materials take two days to treat for pests or insects.
It says the cost has to be met by the traveller.
Insects found in some of the fine mats arriving in Auckland has forced New Zealand authorities to impose the strict measure.
Samoans use fine mats for occasions such as weddings, funerals and fundraising events.