5 daughter colonies of the 4a were tested:
DE-6-1-24594-1986 DE-6-1-24595-1986 DE-6-1-24596-1986 DE-6-1-24618-1986 DE-6-1-24627-1986
6 tested queens were mated at the mating station:
DE-6-1-25640-1987 DE-6-1-25642-1987 DE-6-1-25669-1987 DE-6-1-25687-1987 DE-6-1-25732-1987 DE-6-1-25754-1987
18 daughter colonies of queens mated at the mating station were tested:
DE-6-1-27105-1989 DE-6-1-27107-1989 DE-6-1-27114-1989 DE-6-1-27121-1989 DE-6-1-27127-1989 DE-6-1-27445-1989 DE-6-1-27447-1989 DE-6-1-27448-1989 DE-6-1-27452-1989 DE-6-1-27453-1989 DE-6-1-27459-1989 DE-6-1-27461-1989 DE-6-1-27462-1989 DE-6-1-28353-1990 DE-6-1-28354-1990 DE-6-1-28355-1990 DE-6-1-28358-1990 DE-6-1-28361-1990