Abstract
Since the woolly apple aphid (Eriosoma lanigerum) is still one of the major problems in organic apple orchards, at the Research Centre Laimburg several methods for the control of this pest were tested over the last years. The effect of applications of plant protection products at different timings, of various pruning methods (used in combination with and without hail netting), and of conventional and novel rootstocks on woolly apple aphid infestations was evaluated. Adequate timing of applications of plant protection products enabled to improve pest control, and promising results were achieved with novel rootstocks.