Table 1 Incidence of Esca in vineyards in Hebei and Ningxia provinces from 2017 to 2019
From: Fomitiporia punicata and Phaeoacremonium minimum associated with Esca complex of grapevine in China
Region | Vineyard | Age of vineyard in 2017 | Year | No. of standing plants | No. of symptomatic plants | Vine cultivar | Average incidence (incidence of Esca on different cultivars) |
|---|---|---|---|---|---|---|---|
Hebei Province | Hb-1 | 18 | 2017 | 1200 | 12 | Merlot, “Cabernet type”, Marselan, Petit Verdot | 1.0% (Merlot 0.0%, Petit Verdot 0.0%, “Cabernet type” 3.0%, Marselan 0.7%) |
19 | 2018 | 1200 | 68 | Merlot, “Cabernet type”, Marselan, Petit Verdot | 5.6% (Merlot 0.7%, “Cabernet type” 5.0%, Marselan 0.3%, Petit Verdot 16.7%) | ||
Hb-2 | 6 | 2017 | 510 | 0 | Unknown | 0% | |
7 | 2018 | 560 | 0 | Unknown | 0% | ||
Hb-3 | 18 | 2017 | 960 | 0 | “Cabernet type”, Petit Manseng | 0% | |
19 | 2018 | 240 | 0 | Unknown | 0% | ||
Ningxia Province | Nx-1 | 5 | 2018 | Unknown | Unknown | Marselan, Chardonnay | Based on wine grower’s comment: some diseased plants were found in the field |
Nx-2 | Unknown | 2018 | 2000 | 0 | Unknown | 0% | |
Nx-3 | Unknown | 2019 | 560 | 0 | Unknown | 0% | |
Nx-4 | 10 | 2019 | 200 | 5 | Unknown | 4.0% | |
Nx-5 | Unknown | 2019 | 240 | 10 | Merlot | 4.2% |