Pest-combating compositions containing pest-control actives are formulated for sustained pest-combating
efficacy, utilizing actives fatty acids, undecanone, and / or soy methyl ester in varying combinations. Pest-combating includes both repellency and killing of pests. In specific formulations, the pest-combating composition includes any one, two or three of the active agents soy methyl ester,
fatty acid and undecanone. Fatty acids may be unmodified or may be modified by
transesterification or methanolysis of the oleochemical or conversion of the fatty acids to
alkyl esters. The composition may be constituted as a spray composition,
lotion, paste, or other compositional form. Pests that may be usefully combated with such composition include aphids, ants,
bed bugs, bees, beetles, centipedes, caterpillars, chiggers, cockroaches, crickets, cutworms, earwigs, fleas, flies, fire ants, gnats, grasshoppers, hookworms, japanese beetles, june bugs, lice,
locust, maggots, mealworms, mealybugs, millipedes, mites, mosquitoes, moths, pillbugs, scorpions, silverfish, spiders, stinkbugs, termites, thrips, ticks, wasps, and white flies.