Mosquito control that works on a compound: the four-hour rule beats the fogger

The evening mosquito on a Nigerian compound is not an air problem to spray away - it is a breeding problem with an address, and the females that bite you were made within fifty metres of where you sit. Foggers kill some of the flying generation tonight and zero of next week's. Here is the audit that actually lowers the bite count, ordered by payoff.

The standing-water audit (the whole ballgame)

• Walk the compound after dark with a torch: every vessel that can hold water an adult female can raise children in - blocked gutter and its channel against the wall, tyres, the saucers under pots (the most beautiful garden in the city is a hatchery), buckets left outside, the water storage without a lid clamped down, a discarded carton in the corner the wind blew behind the fence. Tip, scrub, cover, drain - the larvae need calm water and the eggs need the vessel to stay damp between rains, so scrubbing the inside matters as much as pouring.
• The one-a-week rhythm: mosquitoes are faster than seasons - seven days is roughly the water-to-biter schedule, so the audit lives or dies on its calendar, not its thoroughness.
• Ornaments and the obvious: the birdbath gets scrubbed, the vase water changes weekly, the AC's drip tray is the quietest breeding tank in the city's homes - check it, and clear its drain where it runs into the wall.

Barriers that do the real night work

Sleep under a treated net, because the dawn and dusk feeders do their damage when you are unconscious and no spray survives a whole night of fans. Window screens on the bedrooms - mesh costs money once and screens keep the house breathable with the lights on, which is the difference between a compound you can sit in and a house you retreat inside. The door you leave open for the evening breeze is the road in: the fan in a doorway blows harder than any insect's flight speed and costs nothing but a socket - the airflow barrier is the one trick renters and owners can both do tonight.

The things that are theatre

• Coils and plug-in liquid vaporisers push the numbers down in a closed room and lose most of it the moment a window is open - use them in the bedroom before you enter, with the door shut, not as an invisible force field for the sitting area. Herb-burn smokes repel by making the room unpleasant for everything including you, and the larvae stay happy downstairs. Ultrasound apps and wrist bands: no measurable benefit at any honest dose of hope.
• The estate fogger: useful for the immediate swarm at the gate - it's an insecticide event, not control - and it will not reach what matters, the water no one emptied.

When to escalate

A sustained bite load after all of the above means a source bigger than your compound: a neighbour's blocked plot, the vacant lot with its tyres, a shared tank with its lip - that is a block-level conversation and the vector-control people exist for the public end of it. On the personal side: a fever in the season with the bite count means the clinic and the test, not this page - this desk handles the mosquitoes; the illness is the doctor's desk.

Two lines to remember

Empty what holds water once a week; blow a fan across the places you cannot screen. Everything else is marketing with a nozzle - and the bite count will tell you which of these two was the one you needed.