The Thai kingdom has so far survived, in part because it has sealed itself off from the outside world, and through draconian measures managed to keep the food supply relatively safe. The Environment Ministry -- supported by the brutally patriotic "white shirts" -- maintains stringent border and biological security: It has been known to burn entire villages to the ground at the very first instance of deadly "blister rust," "cibiscosis" or "genehack weevil." However, in recent years, the Child Queen has allowed the upstart Trade Ministry to gain power and to encourage some small-scale foreign investment in the kingdom. - Washington Post (review)

not having read this book, I'd guess that those vegetables had vanished and been re-engineered, genetically, by the EM.