Larvicidal activity of maytenus guianensis (Celastraceae) against aedes aegypti (diptera: Culicidae)

Abstract

Introduction: Bioprospection of plant products is used to discover new insecticides. Methods: The larvicidal activity of ethanolic extract and triterpene (tingenone B) from the bark of Maytenus guianensis and their effect on pupation and emergence were evaluated against Aedes aegypti. Results: Crude extract LC50 was 11.3 ppm and caused ejection of the larvae intestine; tingenone B LC50 was 14.8 ppm. Pupation was reduced by 20% and 10%, respectively; however, the emergence was not affected. Conclusions: The crude bark extract exhibited a higher larvicidal effect against the vector.