Apple scab scoring

Apple scab (caused by Venturia inaequalis ) scoring

Description: this protocol presents an observation method and a scoring system to assess apple scab inoculum at the orchard level.

Use: The method can be used in farmers’ field to decide whether to stop the treatments in summer (estimation of the secondary inoculum in June), and to evaluate the potential of primary contamination for the following year (by the estimation of the autumn inoculum in October).

Authors: Christophe Gros, Laurent Brun, Luciana Parisi and Frédérique Didelot (INRA).

Modification date: 25 April 2023 | Publication date: 05 September 2013 | By: IPM network (Contributor: Laurent BRUN (INRA)).