Citrus black spot is a fungal disease caused by the pathogen Guignardia citricarpa, primarily affecting citrus fruits like oranges and lemons. It manifests as dark, sunken lesions on the fruit's surface, which can lead to premature fruit drop and reduced quality. The disease thrives in warm, humid conditions, making it a concern in many citrus-growing regions. Management of citrus black spot involves practices such as proper sanitation, pruning infected branches, and applying fungicides. Farmers are encouraged to monitor their orchards regularly to detect early signs of the disease, helping to minimize its impact on citrus production and overall crop health.