How to Get Rid of Thrips Naturally (DIY Pest Control)

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It's so frustrating when your healthy plants suddenly take a turn for the worse. If you've inspected the leaves, stems, or soil, and found tiny slender insects, you're probably dealing with thrips. They're a serious pest since they feed on the tissue of the plant, preventing it from getting nutrients. Fortunately, you can get rid of them without harmful chemicals. Read on for natural, effective solutions.

1

Blast the thrips off with water.

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    The force of the water alone should knock tiny thrips from the plant. Repeat this 3 times a day and spray them every couple of days until you notice the thrips are gone. [1]
    • If you're trying to thrips off of your houseplants, you can place them in the tub when you spray them to contain some of the mess.
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2

Coat the plant with soap spray.

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    Use a liquid soap like Castile soap and spray the mixture on the leaves, stems, and soil every 3 days for 2 weeks. This will break down the thrips' exoskeletons. [2]
    • Choose liquid soap that doesn't have additives like fragrance, moisturizer, or chemicals. Avoid dishwashing liquid since these can have harsh ingredients that will damage your plants.
3

Try mixing neem oil into the soapy water.

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    If the soapy water alone doesn't seem to get rid of the infestation, add 1 teaspoon (4.9 ml) of neem oil to the soapy solution and shake it really well. Spray it onto both sides of the leaves, the stems, and the soil. It works by dehydrating the thrips so they die. [3]
    • Neem oil is a vegetable oil that comes from the neem tree. You can buy it at most hardware stores, plant supply stores, grocery stores, or online.
    • Check the plants and reapply the neem oil every other week if you continue to see thrips.
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4

Press a lint roller across the leaves.

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    Support a leaf by holding it in the palm of your hand and gently roll the lint roller across the leaf. Then, carefully roll it along the bottom of the leaf, too. [4]
    • Tear off the piece of the lint roller that you used and throw it away in your outside trash so there's no chance that the thrips will get out and get onto your houseplants.
5

Prune back infested plants.

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    Use sterilized scissors to cut off infested leaves, branches, and stems. If the plant is heavily infested, you might have to prune a lot. While this might seem tough to do, remember, the infested leaves won't heal so it's better to get the plant healthy by removing them. [5]
    • Don't stick the cuttings and plant waste in your compost heap since it doesn't generate enough heat to kill the thrips.
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6

Make an essential oil spray.

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    Mix up a simple solution of about 1 cup (240 ml) of water with 2 drops of cinnamon oil and 2 drops of orange oil. Then, spray it on both sides of the leaves, the stems, and the soil. You can do this once a week till the thrips are gone. [6]
    • You can buy natural cinnamon and orange pesticides at most plant supply stores or online if you don't want to make it yourself. Read the manufacturer's instructions about how often to reapply the product.
7

Try diluted isopropyl alcohol on the leaves.

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    Pour some isopropyl alcohol into a dish and dilute it with water. Then, dip a cotton ball in the solution and rub it onto the plant where you see the thrips. They'll dry up quickly and die. Don't forget to check the underside of the leaves, too. [7]
    • To dilute 70% isopropyl alcohol, mix 3 parts water to 1 part alcohol. For 91% isopropyl alcohol, mix 5 parts water with 1 part water.
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8

Lay aluminum foil on the soil.

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    If you're dealing with thrips on a potted plant, cut a piece of foil into a circular ring so it fits around the plant. If you're getting rid of thrips outside, you can lay down long sheets of foil and weigh down the edges with rocks so they don't blow away. [8]
    • Experiment with other reflective surfaces. You might find that cutting old CDs so you can place them around the bases of plants is really effective!
9

Hang blue sticky traps.

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    Once they touch the trap, their wings get stuck and they won't be able to fly off. While this doesn't get rid of younger thrips, it can help you control the adult population.
    • Although you can put out yellow sticky traps, the blue ones seem to be more attractive to the thrips.
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10

Release natural predators.

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    You can buy these at some plant supply stores and release them onto your plants, or simply leave the insects if you spot them in your yard. [9]
    • To encourage other insects that may eat thrips, grow a wide range of plants. This way, you're more likely to see insects like ladybugs and predatory mites.
11

Spray spinosad to deal with a difficult infestation.

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    You can buy garden-safe spinosad at most plant supply stores or online. In general, spray it anywhere you see thrips, but always follow the manufacturer's instructions about how often to reapply the product. [10]
    • Spinosad works by paralyzing the thrips' nervous system so they usually die within 1 to 2 days.
    • Although spinosad is safe to use, it is mildly toxic so avoid getting it on your skin or in your eyes.
    • Usually, pest problems occur if the conditions are conducive to the growth of pests. [11]
    • One pest problem can lead to another. For example, if you do not get rid of a bird problem, you may have to deal with carpet beetles that feed on feathers.
    • You should make strong sanitation efforts to keep your yard and home free from pests. [12]
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      References

      1. ↑ https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/thrips/thrips-outdoors.aspx
      2. ↑ https://www.hortmag.com/tools-materials/mix-your-own-insecticidal-soap-for-garden-pests
      3. ↑ https://youtu.be/PrEw-ACwbe0?t=578
      4. ↑ https://youtu.be/R9ceHHLL9kE?t=1321
      5. ↑ https://ipm.ucanr.edu/PMG/PESTNOTES/pn7429.html
      6. ↑ https://www.researchgate.net/publication/313592215_Effect_of_Orange_and_Cinnamon_Oil_on_the_Occurrence_and_Harmfulness_of_Thrips_tabaci_Lind_on_Onion_-_Preliminary_Results
      7. ↑ https://youtu.be/0n764ei_26w?t=197
      8. ↑ https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/thrips/thrips-outdoors.aspx
      9. ↑ https://biocontrol.ucr.edu/avocado-thrips#Natural%20Enemies%20of%20Thrips%20in%20California
      1. ↑ http://npic.orst.edu/factsheets/spinosadgen.html#
      2. ↑ https://www.mgk.com/the-most-important-part-of-a-successful-pest-management-protocol-the-inspection-blog/
      3. ↑ https://www.mgk.com/the-most-important-part-of-a-successful-pest-management-protocol-the-inspection-blog/

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