21 daughter colonies of the 4a were tested:
IT-20-108-77-2016 IT-20-108-78-2016 IT-20-108-79-2016 IT-20-108-80-2016 IT-20-108-81-2016 IT-20-108-83-2016 IT-20-108-84-2016 IT-20-108-1007-2016 IT-20-108-2024-2017 IT-20-108-2025-2017 IT-20-108-3005-2018 IT-20-108-3007-2018 IT-20-110-77-2018 IT-20-110-79-2018 IT-20-110-80-2018 IT-20-110-81-2018 IT-20-110-82-2018 IT-20-110-84-2018 IT-20-110-85-2018 IT-20-110-86-2018 IT-20-110-1001-2018
3 tested queens were mated at the mating station:
IT-20-70-1-2019 IT-20-70-2-2019 IT-20-70-3-2019
8 daughter colonies of queens mated at the mating station were tested:
IT-20-70-151-2020 IT-20-70-152-2020 IT-20-70-153-2020 IT-20-70-154-2020 IT-20-70-155-2020 IT-20-70-156-2020 IT-20-70-157-2020 IT-20-159-901-2020