DIY Insect Repellent Spray: Combatting Sooty Mold, Aphids, and Scale Insects

As the beautiful season unfolds, plant enthusiasts find themselves facing the challenge of protecting their cherished greens from potential threats that can ruin and weaken them. In this article, discover how to create a natural, cost-effective spray to fend off sooty mold, scale insects, and aphids.

Crafting an Economical Homemade Solution

This homemade spray comes with minimal costs, saving you a few bucks while effectively eliminating pests that may harm your plants. The primary ingredient in this concoction is Coconut Oil Alga Soap, a potassium soap commonly used for laundry due to its excellent stain-removing properties. It’s readily available and costs less than 2 euros, making it a budget-friendly option.


  • 12 grams of Coconut Oil Alga Soap
  • 1 liter of water
  • Clean, empty spray bottle

Making the DIY Insect Repellent: Step by Step

  1. In a spacious pot, bring one liter of water to a boil on the stove.
  2. Turn off the heat and add the Coconut Oil Alga Soap to dissolve it in the hot water.
  3. Allow the mixture to cool completely, setting it aside.
  4. Once cooled, use a funnel to transfer the obtained solution into an empty and clean spray bottle.

Using the DIY Insect Repellent: Unleashing the Magic of Coconut Oil Alga Soap

The secret ingredient, Coconut Oil Alga Soap, is not only an excellent insect repellent but also effective against mites, sooty mold, aphids, and scale insects. However, it’s crucial to avoid using it during plant flowering, as it may harm bees and other pollinating insects.

Application Steps:

  1. Gather all the necessary items.
  2. Mix 12 grams of Coconut Oil Alga Soap with 1 liter of water.
  3. Transfer the solution to a clean spray bottle using a funnel.

Application Guidelines:

  • Apply the insect repellent in the early morning or evening to avoid interfering with pollinator activity.
  • Ensure both sides of the leaves are covered with the product.

Application Frequency:

  • Repeat the process after 24 hours if pests are still present.
  • Use the spray for a maximum of three consecutive days, then suspend it for at least seven days.

Caution: This treatment is not suitable for all plants and should not be used on gardenias, azaleas, cucumbers, cherries, and plums.

Give it a try and be amazed by the results. Happy gardening!