Kalk Bay is squeezed between the mountain and the sea, with a busy fishing harbour, Main Road restaurants and old cottages stacked up the slope. Fish, food and old buildings together mean rats, cockroaches and gulls are part of daily life.
Kalk Bay: what drives biting insects here
Fleas come with pets, and bird mites can follow pigeons and gulls nesting on roofs. Holiday rentals sometimes need bed bug checks after busy periods.
The mountain rises steeply behind the village, with Boyes Drive cutting across the slope, and the railway runs right along the sea. The harbour brings in fish and gulls daily. Salt spray and the South-Easter keep things damp in winter and windy in summer.
Rats around the harbour and restaurant bins top the list. German cockroaches are common in restaurant kitchens, and American cockroaches come up from old drains. Gulls and pigeons are a constant nuisance.
Tell-tale signs
- Day-time bites on the ankles while sitting in the garden, which points to Aedes breeding nearby.
- Small dark mosquitoes resting on shaded walls, under the eaves or behind curtains during the day.
- Itchy, raised bites on arms, face and feet that were left outside the covers.
- Wriggling larvae, sometimes called wigglers, in pond edges, buckets, bird baths or pool covers.
- Swarms in the evening near a water feature, drain or neglected pool.
In the Western Cape, mosquitoes are mainly a nuisance and are not a malaria risk, but the bites can cause swelling and itching that is worse in children and some adults. Scratched bites can become infected, and constant night-time biting leads to poor sleep for the whole household. For hospitality businesses, restaurants with outdoor seating and wedding venues, mosquitoes in the evening can directly affect guest comfort and reviews.
Something most people miss
Electric bug zappers attract plenty of insects, but studies have shown that very few of them are mosquitoes. Screens and source reduction do far more.
How the treatment works
Source reduction always comes first: we walk the property and find every place water collects, from gutters and drains to ponds, water features, plant saucers and covered pools, and tell you which ones to empty, fix or cover. Water that cannot be removed, such as ponds and drains, can be treated with a larvicide or insect growth regulator that stops larvae becoming adults. Adult mosquitoes rest in cool, shaded places during the day, so we apply a residual spray to the undersides of shrubs, hedges, eaves, patio ceilings and other resting areas. For events or heavy problems, ULV fogging can knock down adult numbers quickly, but it only works properly when combined with dealing with the breeding sites.
Want the full step-by-step? See how our mosquito control service works.
Prevention that actually works
- Keep pool water circulating and treated, and drain the water that collects on top of pool covers.
- Stock ornamental ponds with small fish that eat larvae, and keep water features running.
- Clean gutters after winter so they do not hold water through summer.
- Empty pot-plant saucers, buckets, bird baths and pet water bowls at least once a week, because larvae develop into adults in about a week in hot weather.
- Fit mosquito screens to bedroom windows and use a net over cots in summer.
Pricing, honestly
Cost depends on the size of the property, how many breeding sites there are and whether larger water bodies such as ponds or drains need treating. A once-off treatment is priced differently from a programme of visits through the summer season. Fogging for an event is quoted on the size of the area, and the quote itself is free.
Mosquitoes start building up once the weather warms in October and peak from December to March, especially after a wet winter has filled ponds, vleis and gutters. Calm, humid evenings are the worst, while the strong south-easter actually keeps them down on windy days. Numbers drop sharply when the cold, wet winter sets in from about May.
Questions we get asked in Kalk Bay
Are the treatments safe for fish in my pond?
We choose larvicides suitable for the situation and will tell you if a product is not appropriate for a fish pond. In many cases, fish themselves are the best control.
Does fogging get rid of mosquitoes?
Fogging kills adults that are flying at the time, but new ones will hatch from any untreated water. It works best as part of a plan that deals with breeding sites.
Why do gulls keep nesting on my roof in Kalk Bay?
Flat or low-pitched roofs near the harbour are ideal nesting spots, and there is plenty of food nearby. Bird proofing with spikes, wires or netting before the breeding season keeps them off.
Do you come out to Kalk Bay for mosquito control?
Yes. Kalk Bay is part of our regular South Peninsula route, along with St James, Muizenberg, Fish Hoek, Clovelly. Most bookings are done within about 48 hours, and after-hours visits can be arranged.
Why are there so many mosquitoes this summer?
Usually because a wet winter left more standing water, or a breeding site has developed close by, such as a blocked gutter or an untreated pond.
Do the rats in Kalk Bay come from the harbour?
Many do. The harbour and restaurant bins are a reliable food source, so rats move into nearby homes and shops, and we focus bait stations and proofing on those routes.
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