Evaluation of the efficacy of various concentration of deltamethrin impregnated targets on tsetse fly in and around Arba Minch, South Western Ethiopia

Abstract

Different technologies have been introduced and applied practically in the field for many years for the control of tsetse flies. The present study was conducted to test the efficacy and longevity of 20% deltamethrin impregnated targets in 0.2%, 0.4% and 0.8% concentrations checked against the tsetse fly at 5, 10 and 15 minutes of exposure. The selected concentrations of Deltamethrin 20% were applied to targets by dilating with respective dilutants. Then the targets were deployed in selected area for experiment. Flies were collected and brought to the site of the bioassay. The knockdown effect of the insecticide was observed at 5, 10 and 15minutes for every two weeks interval. A total of 900 tsetse flies were used for the bioassay excluding weak flies. The knockdown effect of the insecticides was equally effective in 0.2%, 0.4% and 0.8% concentration (P>0.05) in all the three exposure times. However, the number of knockdown flies significantly differ in between the three different exposure times (P