Rural and urban salt marsh and fresh water areas in the Livingstone Shire area are monitored for the presence of mosquito larvae by water sampling. A secondary method of monitoring is light trapping, which provides data on adult mosquitoes. When sampling reveals an unacceptable larva or adult count, treatment is undertaken.
Both the salt marsh mosquito Ochlerotatus vigilax and the fresh water mosquito Culex annulirostris are vectors of Ross River virus and Barmah Forest virus. The larvae of these species, as well as the larvae of other non-vector (nuisance) mosquito species are treated with either S-methoprene, a growth regulator, which prevents larvae from completing their development to adult mosquitoes.
Rural salt marsh areas within the Livingstone Shire area are treated with S-methoprene. Treatments are usually undertaken after high tide events or significant rainfall.
Urban salt marsh and urban fresh water areas within the major settlements in the regionLivingstone Shire may be treated manually with S-methoprene. Urban fresh water bodies either in the form of permanent water bodies (such as lagoons) or semi-permanent water bodies which fill after rainfall events may provide breeding sites for both vector and nuisance mosquitoes.
Depending upon water sampling results, a proactive misting program may also be undertaken in urban areas adjacent to salt marsh and fresh water breeding sites. Depending upon the results of water sampling, the community may also be informed of the pending emergence of large numbers of mosquitoes.