Septoria theae

Septoria theae is a species of fungus in the family Mycosphaerellaceae. It is a plant pathogen that primarily affects tea plants, causing a disease known as Septoria leaf spot.

Description

Septoria theae is characterized by its small, dark, and circular spots on the leaves of the tea plant. These spots often have a grey or white center, surrounded by a dark brown margin. The fungus produces pycnidia, which are flask-shaped structures that contain spores. These spores are spread by wind and rain, and can survive in plant debris in the soil.

Life Cycle

The life cycle of Septoria theae begins when the spores land on a susceptible host. The spores germinate and penetrate the plant tissue, causing the characteristic leaf spots. The fungus then produces more spores within the leaf spots, which are released and spread to other plants.

Disease Management

Management of Septoria leaf spot involves a combination of cultural practices and chemical control. Cultural practices include removing and destroying infected plant debris, and avoiding overhead irrigation which can spread the spores. Chemical control involves the use of fungicides.

Economic Impact

Septoria theae can cause significant yield losses in tea plantations, as the leaf spots reduce the photosynthetic area of the plant and can lead to premature leaf drop. This can have a significant economic impact on the tea industry.

See Also

• List of tea diseases
• Septoria
• Mycosphaerellaceae

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