The active ingredients in fly and wasp killers are often powerful toxic agents such as dichlorvos, fenitrothion or lindane. Some use pyrethroids, which are natural toxic agents derived from plants. All of these can cause unpleasant reactions and should be avoided.
If you have a troublesome wasp nest which has to be removed, get professional help from your local authority and see if they can use means such as smoke or water to remove the nest before using chemicals. If you have to kill ants, you can do so by pouring boiling water on the nest.
To repel and deter insects, keep all dustbins and wastebins sealed. Empty and clean regularly. Wipe up food spills. Keep food covered and cupboards closed. To remove insects, use a fly-swat or a fish-slice. Open the windows and chase them out.
Lavender and citronella are natural insect repellents, as are many herbs. If you tolerate plant oils, hang dried lavender and herbs around. You can also dab lavender oil or citronella (available from pharmacies) on cloths and hang them in the kitchen.
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