A honeybee strain—Apis mellifera scutellata L—from Africa that has certain behaviors with adaptive value in the tropics, including swarming, absconding tendencies, defensive behavior and opportunistic use of resources
The reproductive ability of Varroa females was evaluated monthly in eight colonies of Africanized bees in the experimental apiary of the Regional University of Blumenau, State of Santa Catarina, Brazil.
As "killer bees" spread northward, David Roubik, staff scientist at the Smithsonian Tropical Research Institute, began a 17-year study that revealed that Africanized bees caused less damage to native bees than changes in the weather and may have increased the availability of their food plants.
Africanized bees were intentionally bred in the 1950s in South America from imported sub-Saharan African bees that are known to be more aggressive, and more productive, than the honeybees native to America.
It concerned the Africanized bee, a serious pest that was accidentally introduced from Africa into Brazil and is just now entering California, after slowly making its way north over the last 30 years through Central America and Mexico.