A food-grade insecticidal composition allowed for use in organic production which is effective in controlling insects, such as ants, aphids, mealy bugs, white flies, spider mites, leaf hoppers, cabbage loopers, leaf eating beetles and caterpillars, cockroaches, flies, wasps, mosquitoes, wood boring and eating insects, and body and head lice but which is non-toxic to humans, household animals, and farm animals includes an effective insect-controlling amount of D-limonene, a non-toxic emulsifying agent, and a non-toxic hydrophilic solvent.