Abstract
Drift on non-target areas is a serious problem in crop protection. To deal with this problem, the legislator in South Tyrol requires the use of drift-reducing injector nozzles at all nozzle positions of the sprayers. Before the introduction of these nozzles, practitioners were concerned that the effectiveness of the preparations used in organic farming could be impaired by a coarser application technique. To investigate this, a series of trials on the regulation of apple scab, powdery mildew, codling moth and thinning were carried out at VZ Laimburg from 2014 to 2020. About the effectiveness of the preparations applied by means of injector nozzles, no significant differences could be found in these trials compared to the previous application by means of hollow cone nozzles.