I stand corrected.....It appears Lemon Grass oil does contain some of the smae chemicals wafted into the air by the bees nasnov glands.
"Together with the QMP, the secretion of workers’ Nasonov gland functions as a cohesion factor for swarm clustering. When the swarm leaves the hive it settles in a temporary location; the first bees reaching the site immediately expose their Nasonov gland to call the rest of the swarm. Here a certain number of workers, called scout bees, are in charge of finding a new suitable place to establish the nest. When a scout bee finds a potential nest site, it communicates the location to the other workers by the waggle dance, then returns to the site and starts to release the Nasonov pheromone to drive the swarm exactly to the new nest entrance (Free 1987; Seeley 2010).
The potential of Nasonov gland components in attracting clustering bees was demonstrated in behavioral assays (Free et al. 1981a,b). Among the various components, geraniol, (E)-citral, and nerolic acid were the most attractive ones. In further studies a synthetic pheromone blend was able to attract swarms to the artificial nest cavities where it was applied (Schmidt 1994, 1999)."
So in this case it is identical chemicals, not similar smells made by different chemicals.
"Together with the QMP, the secretion of workers’ Nasonov gland functions as a cohesion factor for swarm clustering. When the swarm leaves the hive it settles in a temporary location; the first bees reaching the site immediately expose their Nasonov gland to call the rest of the swarm. Here a certain number of workers, called scout bees, are in charge of finding a new suitable place to establish the nest. When a scout bee finds a potential nest site, it communicates the location to the other workers by the waggle dance, then returns to the site and starts to release the Nasonov pheromone to drive the swarm exactly to the new nest entrance (Free 1987; Seeley 2010).
The potential of Nasonov gland components in attracting clustering bees was demonstrated in behavioral assays (Free et al. 1981a,b). Among the various components, geraniol, (E)-citral, and nerolic acid were the most attractive ones. In further studies a synthetic pheromone blend was able to attract swarms to the artificial nest cavities where it was applied (Schmidt 1994, 1999)."
So in this case it is identical chemicals, not similar smells made by different chemicals.