Vol. 10, Issue 6, Part B (2023)

Author(s): Amina Shehu Adamu, Mohammed Suleiman and Ibrahim Sani

Abstract: This study was conducted to investigate insecticide resistance in Aedes mosquitoes in some Local Government Areas (LGAs) of northern Katsina State, Nigeria. Aedes mosquitoes larvae were collected from five LGAs namely Batagarawa, Daura, Kaita, Katsina, and Mashi. The mosquito larvae were then transported to the Postgraduate Research Laboratory of the Department of Biology of Umaru Musa Yar’adua University, Katsina (UMYUK), Nigeria for adult emergence. Four different WHO insecticide-impregnated papers namely Dichloro Diphenyl Trichloroethane (DDT 4%), pirimiphos-methyl (0.25%), Bendiocarb (0.1%) and Permethrin (0.75%) were used for this study. The impregnated papers were tested against the emerged adults of the collected Aedes mosquitoes using WHO standard operating procedure. The tested mosquitoes were identified and their knock down rates (KDR) to the test insecticides were determined. Both morphological and molecular identification revealed presence of two species of Aedes mosquitoes in the study areas namely Aedes aegypti and Aedes albopictus. Ae. aegypti was more abundant than Ae. albopictus. The KDR at 30 minutes was highest (39%) with pirimiphos-methyl, while permethrin had the least (1%). Similar trend in KDR at 30 minutes was recorded at 60 minutes after exposure. Pirimiphos-methyl was therefore recorded to be more effective against Aedes mosquitoes of the study area than the other insecticides. There is needed to investigate insecticide resistance mechanism in Aedes mosquitoes in Katsina State for proper control strategies.

DOI: 10.22271/23487941.2023.v10.i6b.724