Abstract: The present invention provides novel compositions and methods for using the insect neuromodulator tyramine and/or one or more derivatives thereof delivered to insect populations to control certain aspects of such populations. The amount of tyramine and/or one or more derivatives thereof delivered on a per insect basis is significantly greater than a naturally-occurring amount of tyramine normally found in insects and causes deleterious effects including mortality of certain insect life forms and disruption of the reproductive capacity of others in the population.