They can emit both an aggregative pheromone and an anti-aggregative pheramone.
From the en.wikipedia.org
While STEC lurks mainly in cattle guts, entero-aggregative E. coli are known only in humans.
From the newscientist.com
However, Rearded is aggregative major services for business travelers under a single portal.
From the techcrunch.com
So an aggregative strain with the genes for Shiga-like toxin might well be more virulent than ordinary STEC.
From the newscientist.com
He said aggregative, collective ideas could not have adequate foundation unless they rested upon individual components.
From the en.wikipedia.org
The aggregative pheromone attracts other beetles to the tree, and the anti-aggregative pheromone neutralizes the aggregative pheromone.
From the en.wikipedia.org
At this point, the female stops producing aggregative pheromones and starts producing anti-aggregative pheromone to deter more beetles from coming.
From the en.wikipedia.org
Once the female beetles have arrived on a suitable pine tree host, they begin to stridulate and produce aggregative pheromones to attract other unmated males and females.
From the en.wikipedia.org
Aggregative democracy uses democratic processes to solicit citizens'preferences and then aggregate them together to determine what social policies society should adopt.
From the en.wikipedia.org
More examples
Aggregate: formed of separate units gathered into a mass or whole; "aggregate expenses include expenses of all divisions combined for the entire year"; "the aggregated amount of indebtedness"