[Alisdair]

Anyone growing tomatoes in the Mediterranean basin may already have met this pest, which has spread very rapidly since arriving quite recently.
A new joint UK/Netherlands Risk Assessment for the pest which you can find by clicking here makes rather grim reading 

[saldemain]

come across this in tomatoes grown under protection in western Algarve ...... tomatoes grown organically, and upto 80- 90 % loss

[MikeHardman]

Alisdair,

Thank you for the heads up.
I note there are at least two pheromone traps for it:
- http://www.prlog.org/10374056-new-weapon-against-tuta-absoluta-unveiled-by-russell-ipm.html
- http://www.iscatech.com/ecommerce/index.php?main_page=product_info&cPath=1&products_id=199

Also, at least in Iraq, there are parasitic hymenoptera, and others in Jordan, so maybe there's hope for biological control.

Strewth - the moth even has its own web site!
http://www.tutaabsoluta.com/

I note the pest also attacks potatoes and aubergine.