Efficacy of fungicides for the control of early blight caused by Alternaria solani and Alternaria alternata. Updated 31 May 2022. Responsible authors: Bert Evenhuis (WUR), Peter Hartvig (AU), Hans Hausladen (TUM)
The EuroBlight Table to rate the efficacy of crop protection products has changed. In York it was decided that a spray strategy with more than 1 fungicide is no longer allowed, even if this means that 1 fungicide is sprayed in a 7-day interval and the other in a 14-day interval. The time frame of the spray applications should be the same for all treatments. The last assessment will be carried out 3 to 4 weeks after the last spray application. Further assessments are encouraged but not considered for an EuroBlight rating. A successful trial is one that is strictly carried out according to this protocol and early blight is observed in the plots (>10% foliar infection in the worst treatment).