Abstract
In South Tyrol (Italy), the organic apple market is becoming increasingly interested in the variety Pinova. This variety is appealing in terms of yield, appearance and taste, and is less susceptible to apple scab (Venturia inaequalis) than other varieties commonly grown in South Tyrol. However, the variety is susceptible to Gloeosporium rot (Gloeosporium album), difficult to control especially in moist years and/or in case of delayed harvest. Under these conditions, post harvest yield losses of up to 50% may occur. Over the last years, several different approaches to reduce yield losses have been evaluated. Preharvest acid clay (Mycosin and Ulmasud) sprays and postharvest hot water dipping treatments showed highest efficacy in reducing Gloeosporium rot. The results obtained with these control tools are presented, while the activity of other products, which are still under discussion for the use in organic organic farming, will be presented in Part 2.