Genus Cronartium refers to a group of rust fungi that are known to cause considerable damage to various plant species. Some of the commonly used synonyms for the genus Cronartium include Endocronartium, Peridermium, and Cronartium. These fungi infect and damage trees such as white pine, Scots pine, and Japanese black pine, leading to reduced wood quality, dwarfing, and death of the trees. Cronartium fungi have an identifiable appearance due to their bright orange and yellow coloration, and they are spread through airborne spores. Proper management, such as cultural control measures and the use of fungicides, is essential in preventing and managing Cronartium fungus infections.