How to Make Your Own Neem Oil Pesticide

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How to Make Your Own Neem Oil Pesticide

Neem oil as a pesticide has steadily increased in usage and popularity over the past few years. Why? The oil is 100% natural and non-toxic to humans and pets, is inexpensive and offers a long-term solution to pest problems. Since the oil is completely environmentally-friendly and easily broken down, more and more people are turning to neem oil as a biopesticide for their home and garden.

 

How Does Neem Oil Work?

Neem oil is extracted from the fruits and seeds of the neem, an evergreen tree endemic to the Indian subcontinent. It works by interrupting the reproductive cycle of insects. Once ingested, it affects the hormonal system of the insect, causing it to forget to eat and stop moulting, mating and laying eggs. This eventually sees the complete destruction of the insect population in the designated area as the older insects die off without producing offspring. Neem oil is also powerfully aromatic and gives off an odour that insects do not like, protecting plants by making them unappealing.

 

What is Neem Oil Effective Against?

Neem oil is an effective repellent of a wide variety of common garden bugs, including caterpillars, nematodes, locusts, aphids, Japanese beetles and mites. In the home, neem oil can be used to combat ant, cockroach, fly, termite, mosquito and bedbug infestations.

It has no known adverse affects on mammals, birds, bees, butterflies and ladybugs.

 

How Do I Make My Own Neem Oil Pesticide?

Neem oil is a cost-effective pesticide. You can buy neem oil sprays in a garden centre, but if you’d like to make your own, it’s a very simple process. This way, you can control the quality of the ingredients, the concentration levels and the cost – it is often far cheaper in the long run to make your own neem oil spray than buy a premade version in a store. Store versions can also be less potent, with a lower concentration of the active ingredient, Azadirachtin.

To make your own neem oil spray, visit a health food store and purchase good-quality neem oil or neem leaf extract. Look for 100% pure oils, also called crude or raw neem oil. It needs to be cold pressed as head destroys the Azadirachtin, and you might like to look for organic neem oil as well as this will ensure no contamination with petrochemicals or solvents has taken place during the purification process.

Since neem oil does not readily mix with water, you’ll need to use an emulsifier like a mild liquid soap. To make a litre of general-purpose neem oil spray, mix 5mls neem oil, 2mls of liquid soap and 1 litre of water. Add the soap to the water first and then slowly stir in the neem oil. Pour the mixture into a spray bottle and it is ready to use. You’ll need to use the mix within 8 hours as beyond that the ingredients will start to break down.

If you’re pregnant or trying to get pregnant, consult your doctor before using neem oil as it can interfere with your hormonal system.


Greener Ideal is an independent environmental news and lifestyle publication that has been curating content since 2008 to further the green movement. The views expressed by contributing authors are their own and may not reflect those of Greener Ideal.

  • http://www.neemuses.com Milan

    Hi ! One can also use Soapnut Powder as Herbal Emulsifier in case they want to keep everything herbal. Nevertheless, important is that the final solution has to be used in 8 hrs after preparation and preferably sprayed in early mornings and late evenings ( as Azadirachtin is UV sensitive ). Secondly one must spray on the underside of the leaves too where most of the pests / larvae reside. In case you see your plant is sunburnt, conclude that you have used less emulsifier. All the best ! Milan, Neem Tree Promoter & Specialist

  • Michael Schembri

    will the neem oil mix if it has gone solid? If I warm it up a bit, for it to dissolve in water, will it not resolidify if I remix it with the water I am going to spray with?