What if the invasion is biblical? Like, hundreds of them crawling on your ceiling. You have tried lavender. You have tried the light trick. Nothing works.
You can buy a special insecticide spray designed for ladybirds. Look for a pyrethrum-based spray. It is derived from chrysanthemums and is relatively friendly to pets.
But remember: spray on a dry day. Spray only at entry points. Do not spray the whole room. You want to create a moat, not a chemical fog.
A Final, Weird Truth
Some people let them stay. They say it is good luck. The native red-with-black-spots ladybird is actually a gardener's best friend. They eat aphids.
But the Harlequin? They eat everything. They even eat native ladybirds. They are the cannibal bullies of the bug world. Do not feel bad for removing them.
The best advice? Laugh at the absurdity. Your home has been chosen. You are now a reluctant hotel manager for flying polka-dots. Time to check them out.
