Abstract
Apple scab, caused by the fungus Venturia inaequalis is one of the most common diseases in apple cultivation. Due to the limited plant protection products in organic farming, sustainable and effective treatments are required. The working group organic farming at the Laimburg Research Centre tests annually various alternative plant protection products against primary scab. For this purpose, an orchard with 'Golden Delicious' was selected in 2020. A total of 10 treatments consisting of plant protection products and plant strengtheners were evaluated. The analysis of the scab infestation intensity on leaves and fruits as well as the data collection of russeting on fruits was carried out on site. The statistical results show clear differences in the effectiveness of the various products.