Gardening Blog: Eco-Friendly Insecticide

When integrating aquaponics or hydroponics into your gardening routine, it’s important to keep pest control in mind. Fortunately, there are non-toxic and eco-friendly options that can be used to combat pests in your greenhouse or indoor garden. In this blog post, we will share with you a recipe for a homemade insecticide spray that is safe for use in aquaponic and hydroponic gardens.

This insecticide spray recipe is made up of natural and safe ingredients, which makes it an excellent alternative to synthetic or chemical based sprays. And the best part is that it can be easily whipped up with ingredients that are readily available. Before we dive into the recipe, let’s talk a little bit about the ingredients and why they’re effective against pests.

  • Tea Tree Soap: Natural insecticide that is effective at controlling a variety of pests such as whiteflies, aphids, and spider mites. It helps to disrupt the lipid membranes of the insects and suffocate them.
  • Peppermint Soap: Works in a similar way to tea tree soap, but it has a specific effect on spider mites. Peppermint oil is a natural pesticide that has been found to be effective in repelling spider mites.
  • Hydrogen Peroxide: Natural oxidizer that can be used to treat root rot and other fungal infections that can affect your plants. It also has the added benefit of supplying oxygen to the roots, thereby improving their health and growth.
  • Alcohol: Adding alcohol to the insecticide spray increases its effectiveness against pests. Alcohol can help to break down the outer shell of certain insects and make the soap and oil more effective at suffocating them.
  • Water: Necessary to dilute the ingredients and make the spray safe for use. It's important to use clean, distilled water to avoid any harmful chemicals or additives in the mix.
  • Neem Oil: Natural pesticide that has been used for centuries in traditional Indian medicine. It is effective against a wide range of insects and pests, including whiteflies, aphids, and spider mites. Neem oil works by interfering with the feeding and reproductive abilities of pests, ultimately leading to their demise.
Now that we’ve covered the basics of each ingredient, let's get started on the recipe.

Ingredient Amount (ml) Percentage
Tea Tree Soap 5 1.88%
Peppermint Soap 5 1.88%
Peroxide 1 0.47%
Alcohol 20 7.82%
Water 219 87.64%
Neem Oil 1 0.31%
Total 250 100%


  1. In a spray bottle or container, combine the alcohol and water.
  2. Add the tea tree and peppermint soap, and shake well.
  3. Next, add the peroxide and neem oil, and shake again.
  4. Allow the spray to sit for a few minutes before use.

The insecticide spray is now ready to use. Be sure to shake the bottle well before each use, as the ingredients may settle overtime. We recommend applying the insecticide spray in the morning or the evening when the sun is not too hot. This will help to prevent the foliage from burning. Additionally, it’s important to avoid spraying the solution directly on your fish or the water in your aquaponics system, as this may harm your aquatic inhabitants.

In addition to using homemade insecticide spray, there are a number of other things you can do to control pests in your aquaponic or hydroponic garden:

  • Inspect your plants regularly: It is important to inspect your plants regularly for signs of pests. If you see any pests, take action immediately to prevent them from spreading.
  • Use companion planting: Companion planting is a technique where you plant different types of plants together to help control pests. For example, some plants release volatile organic compounds (VOCs) that repel pests.
  • Use biological controls: Biological controls are beneficial insects or other organisms that can help to control pests. For example, ladybugs eat aphids, and lacewings eat spider mites.
  • Keep your garden clean: Remove any dead or diseased plant material from your garden. This will help to reduce the number of pests and diseases in your garden.
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