Analysis of the interspecific association between larvae of Culex pipiens and Culex quinquefasciatus, the common and medically important mosquito species (Diptera: Culicidae) in Hail Region, Kingdom of Saudi Arabia

Objective: To examine the extent of the interspecific association between Culex pipiens and Culex quinquefasciatus in Hail Region, Saudi Arabia with an aim of further understanding the ecology of such mosquito larvae mainly in respect to similarity in their breeding requirements. Methods: Larvae were collected by dipping over one year from breeding sites in nine localities in Hail Region. The degree of the interspecific association between larvae of the two mosquito species was measured on the basis of presence-absence data (Coefficient of Interspecific Association, C AB SD) and on their relative numbers (Index of Association or Sorensen's coefficient, I).