8 daughter colonies of the 4a were tested:
DE-4-1-86-1995 DE-4-1-113-1995 DE-4-1-123-1995 DE-4-1-183-1995 DE-4-1-195-1995 DE-4-1-196-1995 DE-4-1-200-1995 DE-4-1-202-1995
1 tested queens were mated at the mating station:
DE-16-309-2-1997
6 daughter colonies of queens mated at the mating station were tested:
DE-16-309-27-1999 DE-16-309-29-1999 DE-16-309-32-1999 DE-16-309-33-1999 DE-16-309-35-1999 DE-16-309-36-1999