Bengtsson, Marianne and Hockenhull, John (2002) Control of apple scab (Venturia inaequalis) in organic apple growing. StopScab: A Danish research programme for screening substitutes to copper fungicides. 6th International IOBC/WPRS Workshop of Pome Fruit Diseases, Lindau, Germany, 31. August - 5. September 2002. [ Unpublished, ]