We base our disease forecasts on the latest viticultural research. For Powdery Mildew, we are guided by the OiDiag Index according to W. K. Kast and make specific adjustments based on further research and experience.
For the Downy Mildew forecast, VineForecast uses different models depending on the phase. Oospore germination and primary infection are calculated according to the methodology of Caffi & Rossi. Secondary infections are calculated using the leaf wetness hours (BNG). The risk index is calculated from the sum of the temperatures during hours of leaf wetness (for each day). If the value is above 50, there is a moderate risk of infection. If the BNG is higher than 150, a high risk of infection can be assumed.