Sponsor:
Bayerische Landesanstalt für Landwirtschaft, Institut für Pflanzenbau und Pflanzenzüchtung (Bavarian State Research Center for Agriculture, Institute for Plant Production and Plant Breeding)
Financing:
Bayerisches Staatsministerium für Ernährung, Landwirtschaft und Forsten (StMELF) (The Bavarian State Ministry for Food, Agriculture and Forestry) Erzeugergemeinschaft HVG (Hop Producers Group)
Project Management: Team: Duration: Sampling Period:
S. Euringer IPZ 5b, IPZ 5a, IPS 2c April 1, 2021 to March 31, 2021 June 2021 to September 2021
CBCVd monitoring was once again on the agenda in the Hallertau in the 2021 crop year. No monitoring was carried out in other German growing areas. The selection of plots for sampling was guided by their assumed risk of infection. Unlike in the previous year, 10 individual plants were always combined into a single mixed sample for a reduced number of sample units but an increased number of plants sampled.
Table 5.5: Classification of CBCVd monitoring in 2021 Classification of CBCVd monitoring in 2021 Cultivation area monitoring in infested regions HVG Biogas monitoring Voluntary Monitoring (EG HVG) Areas of the newly infested farms (2021) Sum
Plot section
Samples
Sampled plants
165
1650
16500
137 ~15 ~30 ~350
137 ~15 ~45 ~1850
1370 150 450 18470
Farms
187
Table 5.6: Results of CBCVd monitoring in 2021 Year
Affected farms Infested hop area [ha]
2019 3 37
2020 7 94
2021 10 91
During monitoring in 2021, CBCVd was detected for the first time in 3 additional farms, which increased the total number of affected farms to 10. These farms are located on the periphery of areas that are already known to be infested. The overall area on which CBCVd was detected in 2021 decreased because plots on which CBCVd was detected in the previous year were cleared. 71
