very strong tea + citronella + vinegar + a something else which i can't remember at the moment!
i can't find my recipe, sorry, but this one works.
i'm using neem oil (from theneemteam.co.uk iirc) and that seems to be working well too.
The dangers of Citronella have been proven time and time again over years and years but as essential oils and their manufacture/use have not been subject to the same testing procedures as chemicals it hasn't been made official by anyone outside the aromatherapy governing body! YET!
OK - Citronella causes Hyperphotosensitivity - thats a mouthful!
It causes skin cancer basically!
The new ruling is so that it can only be used by a QUALIFIED aromatherapist (about BL**DY time!)
Its one of a few oils that must NEVER EVER be used in sun light, it causes changes to occur under the skin out of sight often leading to skin cancer. and changes in cells throughout the body!
For so many years I have been horrified when reading home made fly spray recipes - the recommended SAFE dilution of Citronella is one drop per litre of base product ie water/oil etc and MUST ALWAYS be used with an emulsifier for it to be safe! and NEVER in the sunlight!
There are many other oils which are just as effective and are SAFE for your beasties
Secondly this did not start out as an EU thing - its something the aromatherapy councils have been campaigning about for years and at last someone is listening and doing something about it.
Next, skin cancer is not the only possible damage but one of 1000's including
Tumors
Eye sight problems including extreme sensitivity to the sun
Poor absorption of vitamins
Deformities to unborn foals
Extreme sensitivity to the sun resulting in sun burn that looks like you've poured a kettle of boiling water over them.
Liver damage similar to Ragwort
Extreme reactions to drug/medicines such as vaccinations and antibiotics.
Sweet-itch - especially nasty because its a bit like putting salt in an ulcer when citronella hits inflamed skin.
This is to name but a few.
Please please think twice before deciding to use Citronella - there are soooo many other choices and more effective choices....
The above is copied from another site - it is a post by a Qualified Aromatherapist