Get Rid of Aphids Naturally With A DIY Aphid Spray

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Get Rid of Aphids Homemade Spray

If you want to learn how to get rid of aphids then you’re in the right place. Learn various ways to get rid of them including our homemade aphid spray.

Help! I Want to Get Rid of Aphids Naturally!

We have bugs! Specifically, aphids on our indoor plants.

I woke up a few mornings ago to find my rosemary plant covered with little black dots. I thought it was just dirt until I saw the legs. Eeek!

I quickly identified them as aphids, which are a pretty common pest for indoor and outdoor plants.

Aphids on Houseplants

Aphids start as little black dots then turn into green bugs. They can also be yellow or orange in the early stages. They typically reside on the underside of leaves or along the stems and bases of the plant.

I figured the easiest way to get rid of aphids would be to blast them off with a spray of cold water; so I tried that first.

The next day, I woke up and my plant had more black dots! So I sprayed it again and hoped for the best. However, the black dots just kept returning. I knew it was time to try something else.

How to Get Rid of Aphids

Commercial Products for Aphids

If you don’t care about using natural products, Bayer® makes an insecticide called BioAdvanced 3-in-1 Insect, Disease, & Mite Control. Ortho® (aka Scotts®, aka Roundup®) also has a few products you can use if you want to go this route. If you’re on the fence about using a natural solution I encourage you to read up on Glyphosphate.1

We, of course, recommend a DIY and natural approach when possible so let’s explore those options.

Natural Remedies for Aphids

Neem Oil as An Insecticide

When researching how to get rid of aphids naturally, the first thing I discovered was neem oil, which I already knew was a good insecticide. A lot of “neem oil” plant sprays on the market do contain some neem oil, but they also contain other undisclosed chemicals. I wanted to stay away from those.

I also considered using pure neem oil (sold for home and beauty use). This would have been a good option, but I would have had to buy some and that meant waiting. I hate waiting. Especially when I could see my plant was in poor shape. (You can find 100% pure neem oil here.)

To make a neem oil spray for aphids simply mix 1 tsp of neem oil and 1/2 tsp of liquid dish soap to 1 quart of water.

Essential Oils as Insecticides

After finding two helpful studies on essential oils and aphids I decided to turn to essential oils with insecticidal properties.

According to one study2, six essential oils were found to have insecticidal properties:

  • coriander (Coriandrum sativum L.) oil
  • lavender (Lavandula spica L.) oil
  • fennel (Foeniculum vulgare Mill.) oil
  • oregano (Origanum vulgare L.) oil
  • juniper (Juniperus communis L.) oil
  • clove (Syzygium aromaticum (L.)) oil

The findings indicate that oregano and clove essential oils are as effective against aphids as the chemical standard used (Karate Zeon®).

According to the other study3, a naturally occurring substance called geraniol was equally as effective in killing aphids. And PubChem states that “the most prolific natural source is palmarosa oil”.4

Ingredients for Homemade Aphid Spray

Armed with my new knowledge for how to get rid of aphids I chose two essential oils that I already had on hand: Palmarosa and Oregano.

Palmarosa essential oil (Cymbopogon martinii) is rich in the naturally occurring chemical geraniol, which has been proven effective against aphids. It has a light, floral-citrus aroma.

Oregano essential oil (Origanum vulgare) is a strong, somewhat medicinal smelling essential oil. It is rich in carvacrol and also contains thymol. Both of these chemical constituents are known to be insecticidal.

Applying Homemade Aphid Spray

Spraying these essential oils directly on the leaves would cause damage to the plant. For that reason, it is best to mix them in soap and then add them to water. This properly dilutes the essential oils. Further, a diluted soapy water spray has also been proven effective against aphids.5

Before I sprayed my whole plant, I tested this spray on a few leaves. I let it sit for several hours and watched for damage to the plant. After seeing no damage on the test area I sprayed the entire plant, and it worked!

The next day there were no aphids to be found. I kept the spray handy in case I needed to use it again, but in a few days, our house was aphid free!

Homemade Aphid Spray to Get Rid of Aphids

Yield 16 ounces

Ingredients

Instructions

  1. Combine essential oils and natural liquid soap in a small bowl and stir well to combine.
  2. Pour soap mixture into 16-ounce spray bottle.
  3. Fill the remainder of the way with distilled water, leaving a little room to shake the solution.
  4. Cap and shake gently to combine.
  5. Spray a test patch on one leaf or a small section of leaves. Let sit for several hours and check to see how the spray affects the leaves.
  6. If the leaves look fine after 6-12 hours, proceed to spray entire plant with the aphid spray. Make sure to spray under leaves, on the base of the plant, and cover all surfaces.
  7. If aphids return, repeat spray in several days.

Notes

Since this spray does not have a preservative, I only recommend keeping it on hand for a couple weeks before making a new batch.

To make a neem oil spray for aphids simply mix 1 tsp of neem oil and 1/2 tsp of liquid dish soap to 1 quart of water.

Note: We also have a great article on how to get rid of ants naturally.

Have you ever used essential oils when learning how to get rid of aphids? If so, which ones worked for you?

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How to Get Rid of Aphids Sources:

  1. Henderson, A. M.; Gervais, J. A.; Luukinen, B.; Buhl, K.; Stone, D. 2010. Glyphosate General Fact Sheet; National Pesticide Information Center, Oregon State University Extension Services.
  2. Atanasova, Daniela & Ganchev, Donyo. (2018). Efficacy of some plant essential oils against cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae) under laboratory conditions.
  3. M.J. Pascual-Villalobos, M. Cantó-Tejero, R. Vallejo, P. Guirao, S. Rodríguez-Rojo, M.J. Cocero. (December 30, 2017). Use of nanoemulsions of plant essential oils as aphid repellents.
  4. National Center for Biotechnology Information. PubChem Compound Database; CID=637566, https://pubchem.ncbi.nlm.nih.gov/compound/637566 (accessed Jan. 28, 2019).
  5. W.S. Cranshaw. (March 2008). Insect Control: Soaps and Detergents – 5.547.

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