Bark beetle art of war

Acoustic and chemical signals are integrated by the bark beetle Dendroctonus valens to limit aggregation. This insect conducts nonlethal attacks on weakened trees at very low densities, it uses the pheromone component frontalin to mass attack healthy trees. *

* Liu Z, Xin Y, Xu B, Raffa KF, Sun J. Sound-Triggered Production of Antiaggregation Pheromone Limits Overcrowding of Dendroctonus valens Attacking Pine Trees. Chem Senses. 2017 Jan;42(1):59-67. doi: 10.1093/chemse/bjw102. Epub 2016 Oct 5. PMID: 27707752.