Cylindrosporium pomi

Cylindrosporium pomi is a fungal pathogen that primarily affects apple trees, but can also infect other fruit trees. It is responsible for a disease known as Cylindrosporium leaf spot, which can cause significant damage to apple orchards if not properly managed.

Characteristics

Cylindrosporium pomi is a fungus that belongs to the Ascomycota phylum. It is characterized by its cylindrical spores, which are typically produced in large numbers. The spores are spread by wind and rain, and can survive in the soil for several years.

Disease Cycle

The disease cycle of Cylindrosporium pomi begins when the spores land on the leaves of a susceptible host. The spores germinate and penetrate the leaf tissue, causing small, dark spots to appear. As the disease progresses, the spots enlarge and coalesce, leading to significant leaf damage and potentially defoliation.

Management

Management of Cylindrosporium leaf spot involves a combination of cultural practices and chemical control. Cultural practices include pruning to improve air circulation and reduce leaf wetness, and removing infected leaves to reduce the source of inoculum. Chemical control typically involves the application of fungicides, with the timing of applications critical for effective control.

Economic Impact

Cylindrosporium pomi can have a significant economic impact on apple production. The disease can reduce the yield and quality of the fruit, and the cost of control measures can be substantial.

See Also

• Apple scab
• Cedar-apple rust
• Fire blight