Content of undies a threat to Australia

Bananas in pyjamas may be OK, but in undies they are not - as a woman discovered at Sydney Airport.

Customs officers stopped the 56-year-old from the Czech Republic when she arrived from Samoa on Wednesday.

Suspecting she was concealing something on her body, a female officer frisked her and found she was concealing three banana plants in her underpants.

Quarantine officers seized the plants, which Customs say are a threat to Australia's banana industry because they can carry black sigatoka disease, fusarium wilt, or moko disease.

The woman was likely to be issued a court attendance notice when investigations were completed, a Customs spokesman said today.

Penalties for breaching quarantine laws can result in fines of more than $66,000 ($NZ74,900) or 10 years' jail.