Phacidiostromella

Phacidiostromella is a genus of fungi in the family Phacidiaceae. This genus is known for its role in plant pathology, specifically in the disease cycle of various tree species.

Taxonomy

The genus Phacidiostromella was first described by the mycologist Johannes Müller Argoviensis in 1884. The name is derived from the Greek words phakos (lens), diastroma (interval), and ella (small), referring to the lens-shaped, small intervals between the cells of the fungus.

Description

Species of Phacidiostromella are characterized by their small, lens-shaped cells and their ability to cause disease in plants. They are typically found on the leaves, stems, and branches of trees, where they cause necrosis and canker formation. The fungi produce spores that are spread by wind and rain, leading to new infections.

Species

There are several species within the genus Phacidiostromella, including:

• Phacidiostromella abietis
• Phacidiostromella piceae
• Phacidiostromella tsugae

Each species is associated with a specific host tree species. For example, P. abietis is associated with fir trees, P. piceae with spruce trees, and P. tsugae with hemlock trees.

Pathology

Phacidiostromella species are known to cause a variety of diseases in trees, including cankers and necrosis. The fungi infect the tree through wounds or natural openings, then grow and spread within the tree, causing damage and disease.

Management

Management of Phacidiostromella infections in trees typically involves a combination of cultural practices, such as proper tree spacing and pruning, and chemical treatments, such as fungicides. Early detection and removal of infected trees can also help to prevent the spread of the disease.

See also

• List of Phacidiaceae genera
• Plant pathology