Dhaka, March 18 -- The mosquito population of Dhaka is rising rapidly even before the arrival of summer rains, causing widespread misery to the residents.

They allege a lack of efforts by the city corporations to control the mosquitoes, but the authorities say they are working to repel the insects.

A study, however, has found mosquito density rising, which has called into question the city corporations' work.

The study, led by Jahangirnagar University zoology teacher Professor Kabirul Bashar, assesses the mosquito population on a routine basis by setting traps in Dakkhinkhan , Uttara, Mirpur, Savar and Jatrabari.

Kabirul said the number of mosquitoes in each trap increased from 200 on an average in November to 420 in March.

The mosqu...