Structure of the Aedes aegypti (L.) and Culex quinquefasciatus Say (Diptera: Culicidae) populations in the houses of Phnom Penh (Kampuchea).

Sex ratio and engorged females ratio were studied in the main mosquito species populations (Aedes aegypti, Culex quinquefasciatus and partially Anopheles vagus) in the houses of Phnom Penh. Collections were carried out in 7 different localities, including area from the centre of the town to the periphery. In Ae. aegypti and C. quinquefasciatus populations females were dominant in 5 localities, while males were dominant in 2 localities. Engorged females were predominant over unfed ones in all cases (collections were always carried out in the morning). Structure of population varied slightly according to the date of collection. The influence of two main factors, character of locality and monthly amount of rainfall, on structure of mosquito population is discussed.