Leaf by Leaf: An improved method of describing apple scab infections in field trials using MS Excel

摘要

An improved method for the evaluation of Venturia inaequalis infections of apple trees in field trials is proposed. The method takes into account the position of infected leaves on long shoots, A MS Excel worksheet was developed to facilitate the processing of these data. This can be downloaded at http://www. oeon. de/downloads/venturia.zip. We use this worksheet in our field trials and also for our consultancy service to compare different on-farm control strategies.