ISHS Acta Horticulturae 668: I International Humulus Symposium
THE IMPACT OF WEATHER CONDITIONS ON THE BEHAVIOUR OF POWDERY MILDEW IN INFECTING HOP (HUMULUS) |
| Author: | B. Engelhard |
| Keywords: | hops Podosphaera macularis, weather parameters, forecasting model |
| DOI: | 10.17660/ActaHortic.2005.668.14 |
| Abstract:
The incidence of powdery mildew infection on hops varies in the hop growing region Hallertau differs enormously between years. The time of the first occurrence of mildew lesions on leaves also varies from mid-May until July. The impact of weather conditions is likely the main reason for these variations, assuming similar cultural practices. Field data weather parameters from 1998 through 2003 were evaluated for logical correlations when several parameters were compared. Results deviating for the most part from current models are presented. These new findings could be the basis for the development of a forecasting system for powdery mildew in hops for hop regions in mid-Europe. | |
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