Homemade Organic Aphid Spray Recipe

Updated on July 1, 2013
Nymph and adult aphids suck liquid from plant stems as well as buds, seed pods & leaves.
Nymph and adult aphids suck liquid from plant stems as well as buds, seed pods & leaves. | Source

Although aphids aren't very big (even the largest adults are usually less than a ¼-inch long), they can cause quite a bit of plant damage, particularly if their populations are large.

Deformation, stunting and stippling may all result as aphids suck fluid from leaves and buds. Often, leaves with aphid damage appear curled and discolored.

What organic methods have you used to control aphids?

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Aphids also suck sap from stems—with less damaging results. And they leave behind honeydew as they feed, a clear liquid that often produces black mold.

The majority of aphid species are general feeders; however, they're particularly drawn to new growth, and some prefer specific species of plants.

At some point in the year, most gardens attract aphids. Their populations are usually kept in check by natural predators like lacewings and ladybird beetles. However, if aphid damage becomes severe, intervention may be necessary. Contemporary wisdom advocates an environmentally-friendly approach to aphid control, one that eschews harsh poisons. One option? Organic pesticides such as garlic oil spray.


8 Safe Ways to Control Aphids

  • Spray strong bursts of plain water to dislodge aphids.

  • Grow flowering plants to attract aphid-eating beneficials.

  • Release aphid-eating beneficial insects like ladybird beetles, lacewings & parasitic wasps.

  • Treat aphid-infested plants with homemade garlic spray.

  • Spray plants with insecticidal soap.

  • Scrape aphid eggs and nymphs from leaves, seed pods and stems, and crush them.

  • Handpick adult aphids and crush them.

  • For severe aphid infestations, neem oil may be applied alternately with insecticidal soap.*


    *Neem oil is a systemic botanical pesticide that sometimes harms parasites that prey on pests like aphids. If you follow a least-harm policy in your garden, use it sparingly.

ORGANIC APHID SPRAY

When properly combined, garlic cloves, mineral oil, ordinary dishwashing liquid and water create a mild organic pesticide that's effective against aphids. The spray also kills cabbageworms, larval mosquitoes, leafhoppers, squash bugs, whitefly and other garden pests. It can even serve as a mild fungicide and animal repellent.

Reasons to Make Your Own Spray

Because it isn't toxic to humans, homemade organic aphid spray is a good choice for aphid control on vegetable crops, herbs and ornamental plants in and around the home. It's also inexpensive to make—and it can be ready to use in little more than 24 hours.

The Drawbacks of Garlic Oil Spray

The primary environmental drawback of garlic oil spray is that it kills not only aphids, but also other soft-bodied insects, including beneficial ones. Ladybird beetles and other hard-shelled insects, however, are ordinarily unaffected by the spray.

Another drawback? It may cause slight leaf burn.

ORGANIC APHID SPRAY CONCENTRATE

5 stars from 2 ratings of Organic Aphid Spray
Adult aphids are small & pear-shaped pests with cornicles that extend from their abdomens. They are usually black, green, orange, red, white or yellow. Pictured: Adult butterfly weed aphids.
Adult aphids are small & pear-shaped pests with cornicles that extend from their abdomens. They are usually black, green, orange, red, white or yellow. Pictured: Adult butterfly weed aphids. | Source

Ingredients

  • 3 oz. garlic cloves, minced
  • 2 tsp. mineral oil
  • 1 pint water
  • 1/4 oz. dishwashing liquid

Instructions

  1. Soak garlic in oil for 24 hours or more.
  2. Meanwhile, combine dishwashing liquid and water.
  3. Add soap mixture to garlic mixture, and stir well.
  4. Strain the mixture and store it in a glass container.

Directions for Use

Add 1-2 Tbsp. of homemade garlic oil concentrate for each pint of water. Then spray affected plants thoroughly.

Because the spray contains oil and soap, it may cause some leaf damage. To ensure that the mixture is not too strong, test it first by spraying a few leaves. Wait 2-3 days for any signs of damage.


Source

About the Author

The Dirt Farmer has been an active gardener for over 30 years.

She first began gardening as a child alongside her grandfather on her parents' farm.

Today, The Dirt Farmer gardens at home, volunteers at community gardens and continues to learn about gardening through the MD Master Gardener program.

Copyright © 2012 by The Dirt Farmer. All rights reserved.



Questions & Answers

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      • The Dirt Farmer profile image
        Author

        Jill Spencer 3 months ago from United States

        Hi Connie, the only probably with linseed oil is that it might engender mold on the plants, so . . . no, I don't think I would substitute it.

      • profile image

        connie Shishkoff 3 months ago

        Does linseed oil work as a "mineral" oil in the natural garlic anti aphid spray?

      • The Dirt Farmer profile image
        Author

        Jill Spencer 5 years ago from United States

        Hi Lee! Your poor broccoli! If I were you, I'd take a picture of the damage and email it to your county extension agent or the university that's connected to Florida's extension service. That's what I did just this past summer when I saw a striped brown stink bug & panicked. (The folks at U. of MD assured me it wasn't a brown marmorated one, thank God.)

        Sounds like you have some sore of caterpillar or, if the holes are small and look like gunshot spray, perhaps flee beetles, which are fond of Brassicas. In future, you could use floating row covers to prevent the attacks, and products with B. t. work on caterpillars, too, at least on the larvae.

        I haven't used any sort of tomato leaf spray. Since we only raise vegetables, fruits and flowers for our personal use, I rarely use anything except bursts of water and my fingers, (I would have scraped off the aphid eggs on the butterfly weed pictured above instead of letting them hatch if I hadn't needed a photo for this hub! : ) )

        Hope your agent can give you some answers. All the best!

        Jill

      • chefsref profile image

        Lee Raynor 5 years ago from Citra Florida

        Hey Jill

        I'll give this a try if aphids come back. Have you any experience with insecticide made with tomato leaves? I tried it last year with mixed results

        My latest problem is something is eating the center leaves on my broccoli. The broccoli is about 4 inches tall and it is only the tender bud in the middle that gets eaten, killing the plant.

        Is there a way to figure out what is doing the damage? I have lots of squirrels. rabbits, crows and cut worms but it is only the broccoli being destroyed

      • The Dirt Farmer profile image
        Author

        Jill Spencer 5 years ago from United States

        Hi grandmapearl! Thanks for sharing the hub. This year we actually had butterfly weed aphids, as you can see the from the top photo. Their eggs are bright orange. I actually allowed them to hatch just to get the pictures! (The butterfly weed has only a little damage, mostly to a few seed pods.) Thanks for reading & commenting. --Jill

      • grandmapearl profile image

        Connie Smith 5 years ago from Southern Tier New York State

        Thanks for sharing this non-toxic recipe with us! I have had problems with aphids in the past, but not so much this year. Probably because of the lacewings. I have bookmarked this, pinned and shared. Voted up, interesting and useful as well. Great advice and very well written!

      • The Dirt Farmer profile image
        Author

        Jill Spencer 5 years ago from United States

        @ mecheshier -- Glad you stopped by! Enjoyed your site http://living-green-newsflash.com/ Hope the spray works well for you.

        @carol7777-- Don't you wish HubPages format allowed us to create a "print" layout for recipes? Hopefully, that's in the future. Thanks for sharing the hub, Carol!--Jill

      • carol7777 profile image

        carol stanley 5 years ago from Arizona

        I marvel sometimes at how simple we can put together natural solutions instead of relying on toxic products from the store. I am going to save this hub ..or probably write down the ingredients... I am voting this valuable hub up and sharing it.

      • mecheshier profile image

        mecheshier 5 years ago

        Great Hub. A recipe I will have to try next spring/summer. for we have a lot of aphids where I live. Thank you for sharing. Voted up for useful and awesomely green!

      • The Dirt Farmer profile image
        Author

        Jill Spencer 5 years ago from United States

        Hi Rachel! Glad to hear from you. I've never used the spray on potato beetles, so I'm not sure, but I don't think it's strong enough to kill them. I've heard that B.t. works on the larvae, although I've never used it either. (We don't get enough beetles to bother with any sort of intervention beyond mulching & handpicking.) If you do give the garlic oil spray a try on beetles, let me know how it does. (: Later, Jill

      • Farmer Rachel profile image

        Rachel Koski 5 years ago from Pennsylvania, now farming in Minnesota

        Great hub, Jill! I'm sure this'll come in handy for me eventually. Do you know if the garlic spray will work on potato beetles, too? I usually douse them with diatomaceous earth, but that can get a little pricey after a while.

      • The Dirt Farmer profile image
        Author

        Jill Spencer 5 years ago from United States

        Hey OldRoses. This is the first year we've really had an aphid problem, and I wanted to go organic with the solution. The beneficials just couldn't eat fast enough to take care of them. Hope the recipe works for you too! Thanks for commenting. --Jill

      • OldRoses profile image

        Caren White 5 years ago from Franklin Park, NJ

        Great hub! I've heard of neem oil and insecticidal soap, but not garlic. I love that idea. And I always have garlic in the kitchen to cook with. Thanks for adding a new natural organic solution to my repertoire.

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