Distribution and seasonal abundance of Anopheline mosquitoes and their association with rainfall around irrigation and non irrigation areas, Kogi State, Nigeria

Abstract :

We conducted an entomological survey to determine mosquito species diversity and abundance in relation to rainfall in Omi reservoir irrigation area, Nigeria. Adult mosquitoes were collected from 10 randomly selected residential houses using pyrethrum spray sheet and Human Landing Catch methods. The communities sampled were grouped into irrigated (intervention) and non-irrigated (control) communities. During the 12-month sampling period, a total of 4285 mosquitoes belonging to 10 species in 1 family were collected. The three most common species collected during this study were Anopheles gambiae, Anopheles funestus and Culex quinquefasciatus. Higher numbers of mosquitoes (69.4%) were collected in irrigated community as compared to those collected in non-irrigated community (32.0%). Comparing the two collection methods used, a greater number 2225(75.4%) of mosquitoes were collected with Pyrethrum spray sheet than those with Human Landing Catch method 724(24.6%).Relatively fewer numbers of mosquitoes were collected during the dry than wet season in all collection points. The lowest number was collected in February (114). However, the number increased, the highest occurring during the wet season particularly in July (445)

Keyword :

Mosquitoes, Omi reservoir, Collection method, Abundance, Kogi

Author(s) : Amaechi, E. C., Ukpai, O. M., Ohaeri, C. C., Ejike, U. B., Irole-Eze, O. P., Egwu, O., Nwadike, C. C.
Downloads : 470
Published Issue : 2018 Vol. 13 Number 2

2018 Vol. 13 Number 2