Nghiên cứu tác dụng xua muỗi Aedes aegypti của dịch chiết húng quế Ocimum basilicum L. Lamiaceae trên thực nghiệm

Abstract

This study was carried out between June and August, 2020 at National Institute of Malariology, Parasitology and Entomology, Hanoi, Vietnam.

Objective: To test repellent effect of basil extract (Ocimum basilicum L. Lamiaceae) on Aedes aegypti mosquitoes in experimental animals.

Methods: Repellent effect of basil extract on Aedes aegypti was assessed according to WHO method in guinea pigs. Total of 900 Aedes aegypti mosquitoes were selected and divided in 9 groups, in which each group had 100 mosquitoes. Three groups were considered as the control ones that were kept respectively in a tunnel with blank nets. Three others were caged in turn at the same tunnel with the net which had been soaked in the basil extract at the concentration of 100 g/100 mL, while the rest were confined in the tunnel in succession with 200 g/100 mL basil-extract-dipped net. Then, the rates of dead mosquitoes and sucking blood inhibition were evaluated after exposing 15 hours to basil-extract nets.

Results: At the concentrations of 100 g/100 mL and 200 g/100 mL, basil extracts revealed average repellent effects on Aedes aegypti with the rates of 62.71% and 76.12%, respectively.