- The study surveyed Aedes aegypti and Aedes albopictus mosquitoes and their seasonal shifts at the University of Sri Jayewardenepura using ovitraps from May 2009 to November 2009. - Aedes albopictus was the dominant species found both indoors and outdoors, with higher abundance outdoors. Its numbers increased with rainfall. - Blocked drainage channels were a major breeding site. Containers like buckets and discarded plastics also contributed to breeding. - Recommendations included maintaining drainage, removing containers and vegetation holding water, and targeted control from May to September to reduce dengue transmission.

1. Ovitrap surveys within the University premises of Sri Jayewardenepura for Aedes aegypti and Aedes albopictus and for seasonal shift in relative abundance of these mosquito species. K.V.K.Gunathilake, B.G.D.N.K.De Silva, M.B.Wickramasinghe .

3. Dengue vector mosquitoes Aedes albopictus Aedes aegypti

13. Ovitrap survey

17. The fourth instar larvae were used for the identification.

21. Results

23. Plastic buckets Concrete plates Leaf bases Bifurcations of trees

24. Curd pots Fish Tanks Drainage canals Garbage heaps Concrete pits

26. Dry period

37. Thank You