Ramularia necator

Ramularia necator is a species of fungus in the family Mycosphaerellaceae. It is a plant pathogen that primarily affects grapevines, causing a disease known as Ramularia leaf spot.

Taxonomy

The species was first described in 1892 by mycologist Pier Andrea Saccardo. It belongs to the genus Ramularia, which comprises over 400 species of fungi. The specific epithet necator is derived from the Latin word for "killer", reflecting the pathogenic nature of the species.

Description

Ramularia necator is a microscopic fungus that produces spores on the surface of infected plant tissues. The spores are spread by wind and rain, and can survive in the soil for several years. The fungus is most active in warm, humid conditions.

Pathogenicity

Ramularia necator is a significant pathogen of grapevines, causing a disease known as Ramularia leaf spot. The disease is characterized by the appearance of small, brown spots on the leaves, which can coalesce to form larger areas of necrosis. In severe cases, the disease can lead to defoliation and reduced yield.

Management

Management of Ramularia necator involves a combination of cultural practices and chemical control. Cultural practices include pruning to improve air circulation and reduce humidity, and removal of infected plant material to reduce the source of inoculum. Chemical control typically involves the use of fungicides.

See also

• List of grape diseases
• Mycosphaerellaceae