Johncouchia mangiferae

Johncouchia mangiferae is a species of fungus in the family Phyllachoraceae. It is a plant pathogen that primarily affects the Mango tree (Mangifera indica). The fungus was first described in 1983 by mycologists G.P. Agarwal and L.N. Nair.

Taxonomy

The genus Johncouchia was named in honor of the British mycologist John Couch, who made significant contributions to the study of Phyllachorales. The species epithet mangiferae refers to the host plant, the mango tree.

Description

Johncouchia mangiferae is characterized by its ascospores, which are brown, multi-septate, and have a unique shape. The asci are bitunicate, a characteristic feature of the order Phyllachorales. The fungus forms black, crust-like stroma on the underside of mango leaves.

Distribution and habitat

Johncouchia mangiferae is found in tropical regions where mango trees are cultivated. It has been reported in several countries in Asia, Africa, and South America.

Pathogenicity

Johncouchia mangiferae causes a disease known as Mango leaf blight. The disease is characterized by the appearance of black, crust-like spots on the underside of leaves. Severe infections can lead to defoliation and reduced fruit yield.

Management

Control of Johncouchia mangiferae is achieved through a combination of cultural practices and chemical treatments. Regular pruning of infected branches and removal of fallen leaves can help reduce the source of inoculum. Fungicides are also used to control the disease.

See also

• List of mango diseases
• Phyllachoraceae
• Mango