First of all peel 1kg of onions and chop them into small pieces with a knife. Now, place the onion slices in a large container.
Pour in 500ml of water and cover the container properly.
Now, let this mixture stand for the next 24 hours so that the onion slices properly dispense their stinky smell into the water.
Unseal the container at the end of 24 hours and strain the onion mixture into another container, using a large sieve or plastic colander.
Dilute the onion mixture by pouring in 20 liters of mild water.
Pour the Onion Garden Repellent into an empty spray bottle and seal thoroughly.
The Onion Garden Repellent is now all set for use; spray it all over the plants in your garden to protect them from harmful insects.
Note: Spray the Onion Garden Repellent after every two weeks until the pests seem to have gone.