The aim of the project is to identify resistance against the two aphid species Myzus persicae and Aphid fabae and thus to create the basis for a later genetic mapping of the resistance. This will be achieved with the help of a broad methodological approach, with entomological methods clearly in the foreground. In addition, a comparison of the results of the aphid species investigated should show whether the resistances observed here is general or whether there is a specific resistance based on an interaction of aphid species-specific effectors (Rodriguez et al., 2017) and plant R proteins. Beside this, the study aims to assess different entomological methods in terms of informative value, comparability and cost-effectiveness with regard to an economically-based screening. It should also be considered, which influence environmental factors and cultivation conditions (greenhouse vs. field) have on some of the methods as well as on the tested resistance.