Products specific for early blight control
Product (Dose rate [litre or kg/ha])Efficacy rating1,2
14 day interval
Efficacy rating1,2
7 day interval
fluopyram + prothioconazole (0.5)4.5  
mefentrifluconazole (1.25)4.3  
difenoconazole + mandipropamid (0.6)3.3  
difenoconazole (0.5)3.33.9 
Products with side efficacy against early blight 3
Product (Dose rate [litre or kg/ha])Efficacy rating1,2
14 day interval
Efficacy rating1,2
7 day interval
mancozeb (2.0)2.33.2 
zoxamide + mancozeb (1.8) 3.5 
fenamidone + propamocarb (2.0) 3.0 
fluazinam + azoxystrobin (0.5) 3.6 
dimethomorph + mancozeb (2.0) 3.5 
1: Ratings for early blight control are based on results from EuroBlight field trials during 2015-2021, and only compounds included in these trials are rated for Alternaria. The scale for Alternaria is a 0-5 scale (see technical report to be uploaded soon). 2: The ratings are intended as a guide only and will be amended in future if new information becomes available. 3: Alternaria solani isolates that are less sensitive to QoI-fungicides have been isolated from potato plants in Europe. Therefore resistance management strategies should be implemented (see FRAC FRAC web site for details). Rating will be lower where fungicide insensitive strains are present.
 
Disclaimer: Whilst every effort has been made to ensure that the information is accurate, no liability can be accepted for any error or omission in the content of the table or for any loss, damage or other accident arising from the use of the fungicides listed herein. Omission of a fungicide does not necessarily mean that it is not approved for use within one or more EU countries. The ratings are based on the label recommendation for a particular product. Where the disease pressure is low, intervals between spray applications may be extended and, in some countries, fungicide applications are made in response to nationally issued spray warnings and / or Decision Support Systems. It is essential therefore to follow the instructions given on the approved label of a particular early blight fungicide, appropriate to the country of use before handling, storing or using any early blight fungicide or other crop protection product.