Within the WP5, Agricultural institute of Slovenia is involved only in task 5.4 – Augmentative biological control of Rumex spp. in grasslands, therefore national cluster for WP5 was not formed. During the spring 2018 the details of experimental protocol were discussed and also two experimental sites with Rumex infestation were selected. Our colleague visited our project partner at CABI station in Delemont (Switzerland) in June 2018, where he gained the knowledge needed to establish the rearing of the Pyropteron chrysidiforme also in Slovenia. After the return with the pupae in the Rumex rootstocks, the adults mated and we collected more than 5000 eggs and inoculate 175 Rumex plants at one of the experimental location. Currently, we are collecting eggs and will be ready to inoculate Rumex plants also on the second site in a couple of weeks.