ENGLAND, United Kingdom (Reuters) — Scientists tracking a crop-destroying caterpillar known as armyworm say it is now spreading rapidly across mainland Africa and could reach tropical Asia and the Mediterranean in the next few years, threatening agricultural trade. Researchers at the Britain-based Centre for Agriculture and Biosciences International (CABI) said the pest, which had not previously been established outside the Americas, is now expected to spread “to the limits of suitable African habitat” within a […]