Sirococcus is a genus of fungi known for causing diseases in various coniferous trees. These fungi typically infect the foliage and stems, leading to symptoms such as needle drop and dieback. The most notable species, Sirococcus conigenus, primarily affects pine trees, resulting in significant damage to forests and timber production. The life cycle of Sirococcus involves the production of spores that spread through wind and rain. Effective management of these fungal infections often includes cultural practices, such as proper tree spacing and sanitation, to reduce the spread and impact of the disease on affected trees.