The gland which produces the alarm pheromone is also associated with the sting apparatus; the embedded stinger continues to emit additional alarm pheromone after it has torn loose; other defensive workers are thereby attracted to the sting site.
The gland is also associated with the sting apparatus. This gland produces the alarm pheromone. The embedded stinger continues to emit additional alarm pheromone after it has torn loose. Other defensive workers are thereby attracted to the sting site.