Author(s): Balkew M, GebreMichael T, Hailu A
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Abstract Anopheles arabiensis strains reared from larvae and pupae collected from two different localities, Metehara and Melka-Worer, eastern Ethiopia, were evaluated against three insecticides. Resistance states of adult females were determined using the WHO test kits under field condition. The insecticides used were WHO discriminating doses of 4\% DDT, 0.75\% permethrin and 0.1\% propoxur. The study revealed that 42.5\% of the An. arabiensis population was resistant to DDT in Melka-Worer while only 30\% of the species was resistant in Metehara to the same insecticide. In Metehara, 25\% of An. arabiensis was also resistant to permethrin while the population was highly susceptible to the insecticide in Melka-Worer. Propoxur, which was not evaluated in Melka-Worer, was highly toxic to An. arabiensis in Metehara. The knocked-down time (KD50) for permethrin was 14.5 and 12.5 minutes in Metehara and Melka-Worer, respectively. The implications of these findings are discussed.
This article was published in Parassitologia
and referenced in Journal of Agricultural Science and Food Research