Phacidiopycnis washingtonensis

Phacidiopycnis washingtonensis is a species of fungus that belongs to the family Phacidiaceae. It is known to cause postharvest diseases in apples and pears, particularly in the Washington state of the United States, from which it derives its name.

Taxonomy

The species was first described in 2005 by researchers at the Washington State University. It is classified under the genus Phacidiopycnis, which comprises several other species of fungi that are pathogenic to fruit trees.

Description

Phacidiopycnis washingtonensis is characterized by its small, dark, and round fruiting bodies that produce spores. The spores are typically oval in shape and are dispersed by wind or water.

Pathogenicity

Phacidiopycnis washingtonensis is a pathogen of apples and pears, causing a disease known as Sphaeropsis rot. The fungus infects the fruit through wounds or natural openings, leading to decay and rot. Infected fruits exhibit symptoms such as dark, sunken lesions and a firm, leathery texture.

Management

Management of Phacidiopycnis washingtonensis involves a combination of cultural practices and chemical control. Cultural practices include regular pruning of trees to improve air circulation and reduce humidity, and prompt removal of infected fruits to prevent the spread of the fungus. Chemical control involves the use of fungicides to protect the fruits from infection.

See also

• List of apple diseases
• List of pear diseases