1 daughter colonies of the 4a were tested:
CH-50-60-60001-2016
5 tested queens were mated at the mating station:
CH-50-60-60050-2017 CH-50-60-60121-2017 CH-50-60-60218-2017 CH-50-60-60222-2017 CH-50-111-60063-2017
15 daughter colonies of queens mated at the mating station were tested:
CH-50-60-60053-2018 CH-50-60-60114-2018 CH-50-60-60126-2018 CH-50-60-60127-2018 CH-50-60-60128-2018 CH-50-60-60436-2018 CH-50-323-60052-2020 CH-50-323-60054-2020 CH-50-323-60055-2020 CH-50-323-60056-2020 CH-50-323-60057-2020 CH-50-323-60059-2020 CH-50-323-60060-2020 CH-50-323-60061-2020 CH-50-323-60062-2020