If you’re referring to the viral
“boil these leaves and say goodbye to flies, mosquitoes and cockroaches” remedy, be cautious about treating it as a proven insecticide.
Some aromatic leaves—such as bay leaves, mint, eucalyptus, or lemongrass—contain compounds that may repel certain insects under particular conditions. But boiling the leaves in water and leaving the resulting liquid around the house has not been shown to reliably eliminate flies, mosquitoes, and cockroaches.
A safer approach
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Mosquitoes: Remove standing water, use window screens, and use an EPA/locally approved insect repellent when appropriate.
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Flies: Keep food covered, empty garbage regularly, and clean food residue.
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Cockroaches: Eliminate food/water sources, seal cracks, and use appropriately labeled cockroach baits or traps.
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Keep children and pets away from insecticides and follow the product label.
If you tell me which leaves the video/article recommends, I can explain whether that particular plant has evidence for repelling or killing these insects and how safe it is to use indoors.
