Vinegar test results in a nutshell ✓ ✓ ✓ ✓
The use of vinegar was effective in the experiment 80%-vinegar had a better effect than 60%-vinegar Vinegar showed a better effect against hop leaves than side shoots The vinegar effect is currently still unsatisfactory
Conclusion: The effect of vinegar in different forms proved to be still insufficient in practice. Therefore, future work should concentrate on possible increases in effect, perhaps through improved application techniques or through the use of other mixing partners. Approval for vinegar as a raw material should be easy to come by.
Sponsor:
Bayerische Landesanstalt für Landwirtschaft, Institut für Pflanzenbau und Pflanzenzüchtung (Bavarian State Research Center for Agriculture, Institute for Plant Production and Plant Breeding)
Financing:
Förderung aus Mitteln der Gesellschaft für Hopfenforschung (GfH) und der Erzeugergemeinschaft HVG (Supported by the Society for Hop Research and the Hop Producers Group)
Project Management: S. Euringer Team:
K. Lutz, Team IPZ 5b
Collaboration:
AG Züchtungsforschung Hopfen (IPZ 5c): (WG Breeding Research): Dr. E. Seigner, P. Hager, R. Enders, A. Lutz, J. Kneidl
Duration:
Dr. S. Radišek, Slovenian Institute of Hop Research and Brewing, Slovenia June 1, 2017 to October 29, 2023
Objective Since the first emergence of lethal strains of Verticillium nonalfalfae, a cause of aggressive forms of hop wilt, in the Hallertau growing region, its spread has been continuous. The pathogen is a soil-dwelling fungus with a wide range of other hosts. It can survive in the soil for up to 5 years as a permanent mycelium without any host plant. It cannot be combated directly. This necessitates an integrated approach to disease infestations that encompasses sanitary measures, breeding efforts, adapted cultivation techniques, and reclamation efforts. A quick and regular transfer of all cutting-edge knowledge about the pathogen should help affected hop farms in implementing management measures and in achieving successful recoveries as quickly as possible. Cooperation with commercial farms In addition to making visual assessments in the field, the Breeding Research Group (see 6.5) analyzed 606 hop plants (the equivalent of 2,822 real-time qPCR (quantitative polymerase chain reaction, a technology used for measuring DNA sequences) for Verticillium nonalfalfae. Likewise, this group analyzed 147 plants from commercial plots. These real-time qPCR analyses are indispensable for validating visual assays. The results of the qPCR analyses also 64
