Vol. 12, Issue 7 (2023)

One of the most significant vegetable crops farmed worldwide is onion (Allium cepa). The yield and output of the crop are impacted by a variety of biotic and abiotic factors. The quantity and quality of both the onion bulb and the seed are significantly decreased by the most harmful fungal diseases, such as stemphylium blight. To breed varieties with long-lasting resistance to the onion stemphylium blight and identify the source of resistance against the range of virulence present in the pathogen population, it is imperative to record population and individual changes with variability in morphological, cultural, and pathogenic characteristics. Furthermore, it is possible to manage the stemphylium blight of onions by using fungicides, but repeated use of these chemicals has also resulted in the development of pathogen resistance and has dangerous environmental side effects. Integrated disease management (IDM), which combines other non-chemical eco-friendly management strategies with chemical approaches to treat diseases more efficiently while using less chemicals, is the most effective and cost-effective way to reduce the threat of this disease. Among non-chemical eco-friendly management techniques, the use of biological control in place of or in addition to chemical disease treatment is becoming more and more common. The current review article discusses the stemphylium blight of onions with distribution, symptoms, pathogenicity, variability, and integrated management.