Ojo De Gallo Mycena Citricolor Apr 2026

It is found throughout Latin America, including Costa Rica, Guatemala, Mexico, Colombia, and Brazil.

Controlling "Ojo de gallo" often requires an integrated approach to manage both the pathogen and its environment: Ojo de gallo Mycena citricolor

While most damaging to coffee, it can infect over 550 plant species across 80 families, including avocado, citrus, and various weeds, which often serve as "hidden" reservoirs of the pathogen. Environmental Impact & Distribution It is found throughout Latin America, including Costa

The fungus uses oxalic acid to penetrate and macerate plant tissues, leading to severe defoliation and "shot-hole" patterns where the centers of old leaf spots fall out. As the spots mature, they turn straw-colored and

The fungus spreads primarily through gemmae —vegetative propagules that are detached and dispersed by wind or splashing rain. Management and Control

It thrives in cool, humid, and high-elevation environments, which unfortunately overlap with regions producing high-quality coffee.

The disease is identified by circular, brown lesions on coffee leaves, stems, and fruits. As the spots mature, they turn straw-colored and often develop small, yellow, hair-like structures called gemmifers .