Notes:

"Semio" means "information" in Latin. Chemical messengers are converted from plant sap. Verbenone production signals that the host is overwhelmed. The release of trans-verbenol may cause females to avoid areas with high densities of other boring females. Females release trans-verbenol primarily to attract male beetles and males in turn release exo-brevicomin and frontalin, which attract more females. Broadleaf trees also release anti-aggregation chemicals, indicating this language is ubiquitous. This is racy stuff.