292 - Spatio-temporal Varitions and Intraspecific Morphological and Morphemeteric Variabilites of Culex larvae during the Cold Dry Season in Khartoum Sudan

Abstract: A cross sectional survey using larval collection stander techniques was conducted during the cold dry season (October 2018 - February2019) in Khartoum State to clarify effect of A/biotic factors on Culex population structure density and diversity. Larvae were obtained from 17 sites encompassing six different habitat types. The culicinae comprising 93.86% of the total collected larvae; the rest were Anophelinae 6.14%. Broken pipes were the most abundant habitat type (33.2%) followed by drain canal (25.7%), water pool (23.9%), irrigation canal (12.8%), water containers (3.1%) and others (1.3%); drain canals were the most reproductive one (174 larvae/dip). Alga, plant and other invertebrates high prevalence in breeding site the high densities of Culex larvae. Shadow and deep site positively increased productivity of Culex larvae. Morphological identification revealed that Cx .quinquefasciatus was the dominant species (69.1%) followed by morphologically similar Cx.univittatus (19.1%) and Cx.antenntus (11.7%). However, Cx. Quinquefasciatus showed intraspecific morphological differences.