INDIA, March 21 -- The Fall Armyworm pest is continuing to sweep across the globe, having moved eastwards from their native Americas, onto Africa, before arriving in Asia only last summer, where they now threaten to cost farmers from India to Thailand, billions of dollars in lost production.

The UN Food and Agriculture Organization (FAO) has convened a three-day meeting of international experts in Bangkok and officials from affected countries, who on Wednesday began discussing what to do about stopping the onward march of the crop-guzzling insects, and limiting the devastation they cause.

"We are here today - together - because we share a growing sense of alarm - but also to learn from each other, particularly from those countries who've ...