How do sandflies breed in the home?

How do sandflies breed in the home?

The vast majority of sandflies enter from outdoors; they do not breed indoors for long periods. Sandfly larvae develop in soil or crevice debris rich in organic matter.

Sources of sandflies

1. Entering from outdoors — Sandflies are even smaller than mosquitoes and can pass through ordinary screens. At night, indoor lights attract them to fly in through windows and door gaps.
2. Breeding in yards — Properties with chicken coops, pigeon lofts, or livestock sheds are more prone to sandflies, as animal manure and moist soil provide abundant organic matter for larvae.
3. Carried in on items — Sandflies may land on clothing during outdoor activities and be brought indoors.

Preventing sandflies from entering the home

4. Install fine-mesh screens (most important) — Sandflies are smaller than mosquitoes; ordinary screens cannot block them. Use screens with at least 40 mesh.
5. Light management — Minimize window opening after dark, or turn off lights when windows are open to avoid attracting sandflies.
6. Yard cleaning — Clean up standing water and leaf litter around coops and pens to reduce breeding at the source.
7. Residual spraying — Apply household hygiene insecticide spray containing deltamethrin on window frames, patio doors, and corners. Sandflies that land on treated surfaces die within 24 hours; effectiveness lasts 2-4 weeks.
8. Outdoor control — For yards with sandfly breeding, spray the ground and corners with deltamethrin-containing sprays, and use outdoor bug zappers for enhanced control.