Abstract INTRODUCTION: The ability of Vitex trifolia starburst halloween mix and Vitex negundo essential oils to kill Aedes aegypti and Culex quinquefasciatus larvae was evaluated.METHODS: The larvae were treated with their respective essential oils at 50-125 ppm concentration.RESULTS: LC50 and LC90 for V.trifolia against Ae.aegypti and C.
quinquefasciatus, and those for V.negundo against Ae.aegypti were 57.7+0.4, 77.
9+0.9 ppm and schulterblattanastomose 55.17+3.14, 78.28+2.
23 ppm, and 50.86+0.9, 73.12+1.3 ppm, respectively.
Eucalyptol and caryophyllene were the major components in Vitex trifolia and Vitex negundo essential oil, respectively.CONCLUSIONS: This study revealed potential larvicidal properties of essential oil from V.trifolia.