Helicoverpa armigera, a polyphagous pest, has traditionally been prevalent throughout the old world. While it has been predicted that it has the potential to make its foray into the New World, till very recently, it was not a reality. However, with its advent into southern America in recent years, the chances of its entry into northern America are extremely high. In such a scenario, with its wide host range of 181 species belonging to 47 families, many of which are major agricultural crops, the likelihood of this pest causing severe global damage is very high. Helicoverpa armigera is well on its way to becoming a ubiquitous pest. This chapter discusses the biology, damage measures and management strategies for this pest, which is currently causing a crop loss of USD 78 billion globally annually.