Cercospora purpurea is a phytopathogenic fungus responsible for the disease known as "black spot" in avocado. This fungus is characterized by producing conidia, which are asexual spores responsible for the spread of the disease. Conidia develop in structures called conidiophores, which emerge from lesions on infected leaves and fruits. These spores are released and dispersed by wind, rainwater, and irrigation. Once the conidia land on a susceptible surface, they germinate and penetrate the avocado tissue through stomata or wounds. Conditions of high humidity and moderate temperatures favor the growth and development of the fungus, allowing the infection to establish and progress. Cercospora purpurea can survive in infected plant debris and in soil, allowing it to infect new plants during the next growing season.