Fighting fall armyworm requires global efforts as the pest could spread to more countries, warn scientists. Within the past two years, Fall armyworm has spread to 44 countries in Sub-Saharan Africa, threatening the food security of about 200 million people who depend on maize as a staple food crop, experts say. The detection of the crop pest in India in July this year and the rapid spread of the worm in the country in a few weeks, the scientists add, shows there is a need for collaboration to find lasting solutions. Read more.