Prevent squash vine borers organically

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If you grow zucchini and squash, you’ve probably lost many plants over the years to squash vine borers. Well, at long last, here comes the calvary! I’d like to share the technique I’ve used to prevent squash vine borers organically in my own garden for years. It’s worked like a charm to keep these pesky, stem-hollowing insects from ruining my zucchini crop. Give it a try and report back with your results. 

How to prevent squash vine borers organically in three simple steps.

Step 1: Immediately upon planting your squash seeds or transplants, cover the area with floating row cover or a layer of insect netting to keep the adult vine borers (see photo) from accessing the plants until they’re large enough for Step 2.

Related post: Make a squash arch

Step 2: When the plants have two to three sets of true leaves, remove the row cover and wrap a four-inch long strip of aluminum foil around the base of each plant. The strips should be between one and two inches wide. Wrap them snugly around the stems, making sure the foil extends below the soil’s surface by a quarter of an inch. The foil barrier will protect the weakest point of the plant and prevent female vine borers from laying their eggs in this vulnerable area. (You can also wrap the stem with florist’s tape, if you’d prefer to have something a little more natural-looking than foil.)

preventing squash vine borers

Female squash vine borers will not lay eggs on the base of plants wrapped with a strip of aluminum foil.

Related post: Grow cucumbers vertically 

Step 3: Every two weeks, head out to the garden to make adjustments. As the squash stems expand, the foil will have to be rewrapped so the plant doesn’t become girdled. This step only takes a moment and is well worth your time. If you find the plant outgrows the foil, get a new strip that’s a little larger than the one before and rewrap the stem.

 

Use a strip of aluminum foil to keep squash vine borers from laying eggs on your plants.

Use a strip of aluminum foil to keep squash vine borers from laying eggs on your plants.

That’s all there is to preventing squash vine borers organically. So easy and so effective! 

Tell us how you deal with squash vine borers in the comments below.

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17 Responses to Prevent squash vine borers organically

  1. Mike Davis says:

    Good tip! I used to do this, also to keep cutworms away from tomatoes, but I got tired of picking up the bits of foil each fall. This year I tried just 3 layers of newspaper instead, seemed to work.

  2. JessB says:

    I will def be doing that this next year. I’m also getting a butterfly net because one was in the garden when I was there and I couldn’t kill it, try as I might. I was soooo upset and mad! A few choice words were used.

  3. Ron Mitchell says:

    For quite awhile now I have successfully used coffee grounds around the stems. You can get them free from such places as Starbucks, or even save your own. Start when the plants are small and keep adding over the season. Add more when it rains. The scent of the used coffee grinds helps either deter the bores or masks the scent of the vine. Perhaps both? Anyways, I have not lost any plants for about 7 years now.

    • Good tip, Ron. Just be careful about any soil pH changes that may occur as the result of adding so many coffee grounds to the area. Might want to test the soil pH every few years and make any necessary adjustments.

  4. Shelly Moore says:

    I have been fighting squash Bugs for years!!! I have made the collars for tomatoes, peppers and other plants, cause that’s what my dad taught me ☺ I didn’t know it helped control Squash Bugs!!! Yay! Another deterrent! I also recently learned that Wheelbugs eat Squash Bugs too! And guess what I found by my garage yesterday? A great big Wheel Bug! I took pics and took him to my veggie garden I hope he and his offspring eat all the squash Bugs they can!!! A little late for this year’s squash but crossing my fingers!

  5. Ralph B says:

    How about wrapping grafting tape around stems? It might deter bores and expand when stem grows.

  6. Tammy says:

    I’m confused, I found eggs on the leaves not the base of the plant. I removed the leaves that had them and destroyed them.

    • Bryan says:

      Those are probably squash bug eggs. Good idea to destroy those as well This article is about the vine borer. It lays eggs inside the base of the stem and the growing larva destroys the entire plant.

  7. I could not grow squash in my garden because squash vine borers killed every plant. As a last resort I did the following
    1. Put yellow bowls filled with Castille soap water amount my plants.
    2. Sprayed the base of the plants with Dipel DF weekly.
    3. Released Trichogramma Wasps when I saw dead Vine Borers in the yellow bowls.
    Results: lost only 1 plant out of 40 plants to squash vine borers. I believe over time the problem will subside since I am killing the worm before it can pupate in my soil.

  8. Kala says:

    How do you make collars for tomatoes?

    • If it’s for cutworms, I usually make tomato collars out of a toilet paper tube. Slit it open lengthwise and slide it around the stem of the tomato. Make sure to sink it down into the ground by an inch or so since cutworms travel just below the soil’s surface.

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