One of NSW’s leading mosquito experts, Associate Professor Cameron Webb, has lent his knowledge and support to Scotland Island’s campaign to dramatically reduce our mosquito population.
After inspecting the island for mosquito-breeding sites, Professor Webb joined Northern Beaches Council environmental health officers to address the community at Catherine Park's community hall on 23 August. Similar communities have achieved impressive reductions, but success depends on one essential factor: everyone working together.
Professor Webb identified two main species: the Australian backyard mosquito (Aedes notoscriptus) and the southern house mosquito (Culex quinquefasciatus). Neither generally travels far, meaning the mosquitoes biting you are likely breeding on your property or nearby.
Aedes notoscriptus lays small batches of eggs around water-holding containers, while Culex quinquefasciatus can lay rafts containing 100–300 eggs. In warm conditions, mosquitoes may develop from egg to adult in little more than a week. One neglected container can therefore produce hundreds of mosquitoes affecting several neighbouring homes.
What every resident can do
1. Remove standing water from your property.
2. Turn buckets, pots, toys, kayaks and other containers upside down or store them undercover.
3. Check that tarpaulins are stretched tightly and cannot form pockets that collect rainwater.
4. Empty and scrub birdbaths, pet bowls and plant saucers at least once a week.
5. Clear blocked gutters, drains and other places where water cannot flow freely.
6. Remove mosquito-breeding plants that hold water, particularly bromeliads, or thoroughly flush them at least once a week.
7. Ensure rainwater-tank lids, access points and taps fit tightly.
8. Fit fine mosquito-proof screening to every tank inlet and overflow.
9. Check that septic-tank lids, inspection caps and other openings are securely sealed.
10. Ask your immediate neighbours to complete the same checks—mosquito control will work only if we act together.
Aquarius Watermaster representatives were available to assist residents, while Council’s Max Payne provided advice about sealing septic systems. Council has also arranged inspections of tanks at the fire shed and Catherine Park.
Professor Webb explained that roadside puddles are generally less suitable where water is regularly moving or disturbed by vehicles. Persistent, undisturbed water may require treatment. BTI is a biological larvicide used by councils and mosquito-control authorities to kill larvae before they become adults. Residents should use only products registered for use in Australia and follow the product label or Council’s advice.
Island resident Tim Scott, a former Queensland Health vector-control officer, has generously offered free property inspections. To participate, please have the neighbours on both sides involved, join the Scotland Island Mozzie Group WhatsApp page and register your interest.
We cannot eliminate every mosquito—but if we start now and work together, we can make a substantial difference. Please inspect your property and be a good neighbour.
Juliet Wills