FAQ

All about Mosquitoes

  • There are a number of suburbs that are in very close proximity to large mosquito breeding sites. After the adult mosquitoes have emerged they leave the breeding sites to seek out food and resting places such as backyard gardens, reserves and natural remaining bushland. Once mating has occurred, the female will seek blood meals and then return to the breeding grounds to lay her eggs. Once her eggs have been deposited she will return back to feed and rest in these types of areas over her entire lifetime. Males will feed on nectar and plant juices but do not seek blood.

    Areas that have particularly thick foliage and shade may attract higher numbers of mosquitoes. These types of areas that are close to breeding sites will inevitably attract higher numbers of adult mosquitoes.

  • The average life span for an adult mosquito can be between two to four weeks although it can be longer in certain conditions and cooler months. Males usually die before the females.

  • Some species travel only short distances from their breeding sites, whilst others like the Aedes vigilax that breeds in the South West during the summer months has been known to travel more that 20km from its breeding sites. This is why some people who do not live close to breeding sites are still at risk of being bitten by mosquitoes that carry disease and also find them in nuisance levels. Within 3km of a breeding site, mosquitoes of most species in the Leschenault and Geographe Regions will move freely and be likely to cause nuisance at certain times.

All about our management efforts

  • There are a number of suburbs that are in very close proximity to large mosquito breeding sites. After the adult mosquitoes have emerged they leave the breeding sites to seek out food and resting places such as backyard gardens, reserves and natural remaining bushland. Once mating has occurred, the female will seek blood meals and then return to the breeding grounds to lay her eggs. Once her eggs have been deposited she will return back to feed and rest in these types of areas over her entire lifetime. Males will feed on nectar and plant juices but do not seek blood.

    Areas that have particularly thick foliage and shade may attract higher numbers of mosquitoes. These types of areas that are close to breeding sites will inevitably attract higher numbers of adult mosquitoes.

  • The average life span for an adult mosquito can be between two to four weeks although it can be longer in certain conditions and cooler months. Males usually die before the females.

  • The majority of treatments that are undertaken are targeted on the larval stage of the mosquitoes lifecycle not the adult stage. These treatments are carried out once hatching or larval activity has been detected via breeding site surveys. The aerial treatments are not scheduled as such but are undertaken and timed to result in the highest possible reduction of potential mosquito numbers. Once adults have emerged they disperse over a large distance and make adult mosquito management very difficult.

  • Generally local government does not utilise adulticiding (fogging) as a main method for mosquito reduction. Adulticiding has not proven to be very effective in our area and the most effective treatment method is larviciding. Occassionally we will utilise adulticiding at times of very high disease risk or when mosquitoes are in extreme numbers. The areas that are targeted with adulticides will usually be those adjacent to breeding sites or particular areas that harbour large numbers of adult mosquitoes.

    Adulticiding is non-specific (ie. it kills other beneficial organisms and is also heavily dependent on wind conditions and requires winds of less than four knots). The chemicals are lethal to aquatic life (especially fish), can be toxic to birds and may cause eye and respiratory irritation to humans. For these reasons the City uses adulticiding (fogging) sparingly and as a last resort.

  • Some species travel only short distances from their breeding sites, whilst others like the Aedes vigilax that breeds in the South West during the summer months has been known to travel more that 20km from its breeding sites. This is why some people who do not live close to breeding sites are still at risk of being bitten by mosquitoes that carry disease and also find them in nuisance levels. Within 3km of a breeding site, mosquitoes of most species in the Leschenault and Geographe Regions will move freely and be likely to cause nuisance at certain times.

  • Yes there are a number of species of both fresh and saltwater breeding mosquitoes that are known carriers and transmitters of Ross River virus and Barmah Forest virus. If you think you have become unwell after being bitten by a mosquito you should visit your GP to seek medical advice.

  • The local government authorities’ mosquito management program is largely successful in reducing and maintaining acceptable numbers of mosquitoes. Due to extensive breeding areas and larval densities, total eradication is not possible and the program aims for the best kill rates possible. Weather conditions can also impact on the effectiveness of treatments particularly if storm surges are received immediately after larvicides are applied. It is important for residents and visitors to remember that personal protective measures are required in the Geographe Bay Region and greater south west.

All about Mosquito Borne Diseases

  • There are a number of suburbs that are in very close proximity to large mosquito breeding sites. After the adult mosquitoes have emerged they leave the breeding sites to seek out food and resting places such as backyard gardens, reserves and natural remaining bushland. Once mating has occurred, the female will seek blood meals and then return to the breeding grounds to lay her eggs. Once her eggs have been deposited she will return back to feed and rest in these types of areas over her entire lifetime. Males will feed on nectar and plant juices but do not seek blood.

    Areas that have particularly thick foliage and shade may attract higher numbers of mosquitoes. These types of areas that are close to breeding sites will inevitably attract higher numbers of adult mosquitoes.

  • The average life span for an adult mosquito can be between two to four weeks although it can be longer in certain conditions and cooler months. Males usually die before the females.

  • The majority of treatments that are undertaken are targeted on the larval stage of the mosquitoes lifecycle not the adult stage. These treatments are carried out once hatching or larval activity has been detected via breeding site surveys. The aerial treatments are not scheduled as such but are undertaken and timed to result in the highest possible reduction of potential mosquito numbers. Once adults have emerged they disperse over a large distance and make adult mosquito management very difficult.

  • Generally local government does not utilise adulticiding (fogging) as a main method for mosquito reduction. Adulticiding has not proven to be very effective in our area and the most effective treatment method is larviciding. Occassionally we will utilise adulticiding at times of very high disease risk or when mosquitoes are in extreme numbers. The areas that are targeted with adulticides will usually be those adjacent to breeding sites or particular areas that harbour large numbers of adult mosquitoes.

    Adulticiding is non-specific (ie. it kills other beneficial organisms and is also heavily dependent on wind conditions and requires winds of less than four knots). The chemicals are lethal to aquatic life (especially fish), can be toxic to birds and may cause eye and respiratory irritation to humans. For these reasons the City uses adulticiding (fogging) sparingly and as a last resort.

  • Some species travel only short distances from their breeding sites, whilst others like the Aedes vigilax that breeds in the South West during the summer months has been known to travel more that 20km from its breeding sites. This is why some people who do not live close to breeding sites are still at risk of being bitten by mosquitoes that carry disease and also find them in nuisance levels. Within 3km of a breeding site, mosquitoes of most species in the Leschenault and Geographe Regions will move freely and be likely to cause nuisance at certain times.

  • Yes there are a number of species of both fresh and saltwater breeding mosquitoes that are known carriers and transmitters of Ross River virus and Barmah Forest virus. If you think you have become unwell after being bitten by a mosquito you should visit your GP to seek medical advice.

  • The local government authorities’ mosquito management program is largely successful in reducing and maintaining acceptable numbers of mosquitoes. Due to extensive breeding areas and larval densities, total eradication is not possible and the program aims for the best kill rates possible. Weather conditions can also impact on the effectiveness of treatments particularly if storm surges are received immediately after larvicides are applied. It is important for residents and visitors to remember that personal protective measures are required in the Geographe Bay Region and greater south west.