25 daughter colonies of the 4a were tested:
DE-19-9-416-2016 DE-19-40-43-2016 DE-19-40-45-2016 DE-19-40-59-2016 DE-19-40-74-2016 DE-19-40-75-2016 DE-19-40-81-2016 DE-19-40-86-2016 DE-19-40-88-2016 DE-19-40-99-2016 DE-19-40-101-2016 DE-19-40-102-2016 DE-19-40-108-2016 DE-19-40-113-2016 DE-19-40-115-2016 DE-19-40-117-2016 DE-19-40-118-2016 DE-19-40-119-2016 DE-19-40-120-2016 DE-19-40-198-2016 DE-19-151-616-2016 DE-19-151-1116-2016 DE-19-151-1416-2016 DE-19-151-5116-2016 DE-19-151-9916-2016
9 tested queens were mated at the mating station:
DE-19-9-2717-2017 DE-19-40-81-2017 DE-19-40-87-2017 DE-19-40-89-2017 DE-19-40-99-2017 DE-19-40-173-2017 DE-19-40-218-2017 DE-19-40-233-2017 DE-19-40-238-2017
6 daughter colonies of queens mated at the mating station were tested:
DE-19-9-8118-2018 DE-19-177-817-2018 DE-19-177-917-2018 DE-19-177-1017-2018 DE-19-177-1217-2018 DE-19-177-1417-2018