Many of the complex interactions among social insect colonies, such as bees, wasps, and ants, are mediated by pheromones. These include ant trails and honeybee alarm pheromones, to name a few. Conventional insecticides are declining in use. The European Union's recent prohibition on insecticide groups of neonicotinoids, including as thiamethoxam and fipronil, is also expected to drive the...