Hello,
We have as a member here
Markku Hakkinen, a renown researcher of banana species who travels often to Asia and the Pacific. It might be interesting for you to contact him and learn what publications he has or knows of for Laos, trip itineraries to Laos, etc.
Also, since ancient times peoples of Laos and the peninsula in general have been cultivating seedless varieties of bananas. These too are of great interest here.
Welcome