The heavy rains experienced on Friday 15 March and over the weekend has led to a large saltmarsh mosquito hatch across our coastal wetlands. The eggs hatch into larvae which will take about seven days to develop into adult mosquitoes. Adult mosquito activity can then be expected to last for up to two weeks. Council’s Entomologists are aware of the hatch and aerial treatments will start on the afternoon of 18 March and continue into Tuesday 19 March. All our known saltmarsh breeding sites will be treated including areas around Bald Hills, Brighton, Boondall, Brisbane Airport, Pinkenba, Fisherman and Whyte Islands, Hemmant and along Bulimba Creek, Tingalpa and Mud, St Helena and Green Islands. The eco-friendly sprays (safe for other insects, the environment and humans) target mosquito larvae to ensure we catch them before they mature. To find out more about the various treatments Council uses as part of their mosquito management program please see information provided below.
Brisbane City Council manages more than 2,500 known freshwater mosquito breeding sites on public land to reduce mosquito numbers. Council’s mosquito management staff inspect and treat these sites regularly using quad bikes, utility trucks and on foot.
The large saltmarsh mosquito breeding habitats in coastal areas are sprayed by helicopter with ground support by quad bike teams. In a typical season Council will treat approximately 20,000 hectares of coastal saltmarsh by helicopter.
Council treats the saltmarsh mosquito larvae in their breeding pools before they emerge with either Bti (Bacillus thuringiensis israelensis) or methoprene based products that target the larvae and are safe for other insects, the environment and humans. Bti only effects larvae for the few days before they pupate while methoprene only disrupts the pupation process. This means that there are usually only a few days available after a hatch event to successfully control the larvae with these products.
Ways Council treats for mosquitoes
Council’s control activities are scientifically managed, targeting specific areas where and when breeding is known to occur. Our program follows industry best practice and uses products designed to kill mosquito larvae without harming other aquatic life.