Resistant Pest Management Newsletter

The study aimed to evaluate the susceptibility of Anopheles species to DDT 4% and deltamethrin 0.05%. Mosquitoes were tested for their susceptibility to both insecticides following WHO standards and using test kit provided by WHO. The study indicated that Anopheles mosquito was found tolerant to DDT 4% and deltamethrin 0.05% in Juba County in all mosquitoes collected from the sentinel sites. However, the mosquito species was found tolerant according to WHO criteria where the mortality rate during 24 hrs is less than 98%. The results of the present study showed that the DDT 4% KDT50 to Anopheles species exposure for 1 hr was found 6.7, 1.6, 1.4 and 0.9 minute in Northern Bari payam, Katour payam, Juba payam and Munuki payam respectively. The results of the study showed that the mortality rate after 24 hrs in the sentinel sites selected in Northern Bari payam, Munuki payam, Katour payam and Juba payam was found 98%, 96%, 96% and 97.6% for DDT 4% and 74.7%, 90.4%, 88% and 88.8 respectively, therefore according to Spring 2010 Resistant Pest Management Newsletter Vol. 19, No. 2 3 the WHO criteria all the Anopheline mosquito species found in Juba County seemingly tolerant to DDT 4% and deltamethrin 0.05%.