Pheremones are used in intraspecific communication, that is, when a member of a species wishes to communicate with another member. An example of this would be an alarm pheremone that an ant would release when his or her colony was being invaded, to warn the other members of his/her species within the colony.
On the other hand, a synonome is a chemical that allows interspecific communication, between two species. When actively feeding, BSF maggots produce a synonome that only attracts adult BSF females back to the pod, but tells pest flies to stay away.
Therefore, at this point in the project, where we have adults emerging every day, it is quite important that we don't forget about making the maggots happy and active, because without them, we would have a pod full of pest flies, and no adult females coming back to lay eggs.
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