Evaluación del insecticida del extracto de caléndula (Calendula officinalis) sobre larvas de mosquitos Aedes aegypti

Abstract

The Aedes aegypti, better known as the yellow fever mosquito, is the vector with the highest incidence in Colombia, has been increasing in urban areas and represents a major risk to public health, where more than half of the population is affected nationally; in addition, this species has an advantage in terms of adaptability over other species, which indicates that they are a highly invasive species, because their eggs are resistant to hostile environments, also the means of transport of these are humans which facilitates their reproduction and expansion. For this reason in this project we are looking for an ecological and sustainable alternative for the larvae elimination by evaluating the effect of caléndula (Calendula officinalis) as an insecticide, since this plant contains medicinal properties and belongs to a plant group with highly effective insecticidal activity on pests. This product would be of great innovation in biological agents of organisms of public health interest reducing the chemical impact in some ecosystems where Aedes aegypti inhabits and lays its eggs. The Extract show lethality effect directly proportional to the extract concentration from 33% until 99% over four stage larvae after 48 hours, with ascendent concentration from 250 until 1250 ppm. CL50 it was 318ppm and CL90 was 983ppm.