MSPTM 2019 Annual Scientific Conference
13 - 14 March 2019
InterContinental Kuala Lumpur




E-Poster Presentation Competition for Student
Scaling Up Efforts in Tropical Disease and Vector Control through Evidence-Based Research
Vector Biology & Control


Main Author
Sowmyashree K1
Presenting Author
Sowmyashree K1
Prof. Raju Krishna Chalannavar1
Nityasree BR1

Authors' Institution

Department / Institution / Country
Applied Botany / Mangalore University / India1
Abstract Content

Mosquito-borne malaria remains a major cause of morbidity and mortality at the global and regional levels and the number of malaria deaths globally remains higher than other mosquito-borne diseases. However, disease control is now threatened by alarming rates of insecticide resistance in insect populations, prompting the need to develop a new generation of specific strategies that can reduce vector-mediated transmission. Projecting the eco-friendly control measures are essential for planning integrated vector control activities for sustaining elimination and preventing reintroduction of malaria. The present study aims to develop the plant-based larvicides against malaria which driven more by the understandable hope that reducing larval numbers will benefit the control of mosquito and public health, than by controlling the adult mosquitoes.

The larvicidal potential of 2 varieties of Psidium guajava L. variety L-49 and Psidium guajava L. variety Lalit, essential oils were extracted by Clevenger hydrodistillation and were tested against malaria-transmitting vector Anopheles stephensi at the concentration of 5-70 ppm in the temperature of (28±2) ℃ and relative humidity of (75±5) % for 24 hours and mortality was recorded. At all levels of concentrations, mortality of the larvae of An. stephensi increased with an increase in the concentrations. However, essential oil of P. guajava variety L-49 showed the more larvicidal effect with LC50 value of 23.60 ppm and LC90 value of 53.70 ppm than Psidium guajava L. variety Lalit with LC50 value of 29.85 ppm and LC90 value of 66.07 ppm. It was observed that the larvae of An. stephensi were highly susceptible to the essential oils of both Psidium species and could consequently be used to reduce the prevalence of malaria in the endemic areas. 

Keywords: Psidium Guajava L. variety L-49, Psidium Guajava L. variety Lalit, Larvicidal activity, Malaria, Anopheles stephensi
Requires Audio or Video system for Presentation?: No