Evaluation of ajwain and mustard seed extract on susceptibility of Anopheles stephensi Liston

Abstract

The most effective method to manage mosquito population is to kill aquatic stages (egg, larva and pupa) of mosquito than the aerial adult stage. The susceptibility test was evaluated against larvae of Anopheles stephensi in the laboratory conditions maintaining the temperature of 27±2ºC and 70±80% Relative Humidity. The combination of the seed extracts of Trachyspermum ammi (ajwain), mustard oil and naphthalene were taken in the ratio 1:2:1. Results of the larval susceptibility test after 25 hours of treatment revealed that the combination of the three components are significant in killing the larval population of Anopheles stephensi to some extent. It has also been noticed that the rise in dose from 1ml/199ml to 7ml/99ml of water increased the larval mortality.