Scab infection management on apple leaves in Western Balkans
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The disease of apple scab caused by the pathogen of Venturia inaequalis is a nonstop issue to the apple cultivators. The infection requires prompt and persistent treatment so as to control the infection. Today there are a few integrated pest management products (IPM) and programs for the treatment of apple scab with various application time. The aim of this study was to identify the optimal application time frame and consolidating it with few treatment programs for dealing with the apple scab disease. For this purpose, were made eight treatment programs comprising several chemical products and were realized in three distinctive treatment periods within the same season. The research is performed amid three years 2015–2017 in one experimental orchard. The formation of the experiment is two factorial randomized block with four replications. The disease infection level was evaluated on 2400 leaves from 98 apple trees. Based on analysed disease index (DI) the treatment programs and periods were compared with each other to conclude with the best combination of fungicides and application period for scab disease management on infected leaves.