One of the problem of pheromones is their constant diffusion during the period of reproduction of insects. Could nano fibers containing the pheromones solve this problem?
Nano fibers soaked in pheromones resulting into sorption of pheromones and then followed by its extraction or recovery under controlled conditions may address your problem of controlled diffusion or dispersion. If I mean that is your problem. However nano fiber pretreatment is a must for better sorption and fibers with required surface chemistry and surface area to volume ratio.