Mosquito sprays and their possible effects on the results Cherie Knight, N/A 15 June 2010 I lived in Kwangju a few years ago. Early in the mornings when the weather was good, at least the area I lived in was often sprayed with a chemical to kill mosquitos. It would be my guess that this spray was not used or used less extensively in the "more rural" areas. This spray would have an effect on the mosquito population and therefore reduce diseases spread by mosquitos in urban Kwangju. Maybe these sprays also reduce the tick population and therefore tick-related diseases as well. Has this been looked into? What do you think? Competing interests None.