Diseases

Grapevine bois noir

Vitis L.

A grapevine disease caused by Candidatus Phytoplasma solani, also known as "bois noir". It manifests as chlorosis or reddening of leaves, necrosis of the vine, and wilting of inflorescences, and is transmitted by the planthopper Hyalesthes obsoletus.

In the reference 5 varieties crop Grapevine, where this is mentioned in the description.

The causative agent of the disease is the phytoplasma Candidatus Phytoplasma solani from the 16SrXII-A group. Symptoms include characteristic downward curling of the leaves, sectoral necrosis along the veins, and poor lignification of shoots, which freeze and turn black during winter. On inflorescences, the pathogen causes abortion and shriveling of berries, which acquire a bitter taste.

The primary vector of infection in vineyards is the polyphagous insect Hyalesthes obsoletus, which transmits the pathogen from weeds such as Convolvulus arvensis. No specific resistance genes have currently been identified in Vitis vinifera cultivars, therefore, disease management focuses on phytosanitary measures and controlling the population of the vector.

General information about the subject — on the page Stolbur (phytoplasmosis).

Sources8

Varieties of Grapevine mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.