Smith and Newhook (1961) recorded downy mildew on leaves, calyx, and fruits of boysenberries and blackberries causing a disease locally known as "dry berry". They recorded it from boysenberries in the Auckland and Nelson areas where it was responsible for considerable crop losses for a number of years. They observed that a colloidal sulphur-lime sulphur spray programme used to control eriophyid mites also gave some control of the downy mildew fungus. It occurs on roses grown out of doors; in Auckland in a humid early summer season in 1961 it attacked leaves, calyx, and flowers. In recent seasons similar outbreaks have occurred. Both in boysenberries and roses, although of only minor economic importance, it can be troublesome in some seasons.