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Prevent Squash Vine Borers from Killing Your Squash & Pumpkins

July 1, 2014 By: Anna8 Comments

Squash Vine Borer Preventer

June is the beginning of summer, kids get out of school, and graduations.  For gardeners it is the beginning of squash vine borer season.  Yes, the dreaded squash vine borer that can decimate your pumpkin and squash crop with a blink of an eye.   In fact last year, I think the borer also attacked my melon plants . The best way to avoid these bugs is with a good offense.  Listed below are preventative tips to catch those buggers before they eat you out of house and pumpkin.

The borer usually appears in late spring but check with your agricultural extension when to be on the outlook for these moths.

How to Keep an Eye Out For Them

There are several ways you can keep your eyes peeled for those ugly moths. (My apologizes Mother Nature, but I am not a fan of this bug.)

Squash Vine Borer

1.  Learn what these bugs look like.  They sound like a wasp and they fly during the day.  Most moths fly at night.

2.  These bugs overwinter and lay eggs at the base of your plants. Check the base of your plants and leaves regularly during their season.  In zone 6, they appear at the end of June.

3.  Put out yellow traps to find out when they are active.  Any yellow bowl with water will do.  They are attracted to the color yellow.  If you find one in the bowl, you know you need to be on the outlook for these bugs.

4.  Consider growing butternut squash (as well as other varieties classified as cucurbita moschata,) snake gourd or cucuzza, which are resistant to the squash vine borer.   University of Illinois adds that the green striped cushaw is  fairly tolerant to borers.

5.  Spray the base of the plants with Surround kaolin clay.  I haven’t tried this method but I am thinking about it especially for my apple trees.

Once they are active…

1.  Cover squash with row covers until they start blooming. (Just to be extra-vigilant, you should probably cover them earlier than when the squash vine borer is supposed to emerge.)

Squash Vine Bororer Eggs

2.  Start monitoring the plants looking for brown eyes.  Check the leaves and base of the plants.  You might see the above eggs which are squash bug eggs.  Destroy those too.  See HERE an easy way to save the leaf and get rid of the eggs.

3.  I put aluminium foil or knee high panty hose around the base of each plant in June.  (See picture above.)  The aluminium is wrapped around all my squash (winter and summer,) melons, cucumbers and pumpkins.  Last year, they killed my pumpkins and almost killed my zucchini.

If Your Plants are Attacked

If your plants have an orange sponge like substance at the base, they have several worms inside your plants.  HERE is a picture of one my plants from a couple of years ago.  (You will also see what the worms look like.)

1.  If you have a long season, you can replant.

2.  Cut out the worms.

3.  Destroy the plants that succumbed to the borer.  Toxic Free NC states:

“Plants that have been killed by squash vine borers or are past the point of saving should be removed from the garden along with their resident pests. Seal them together into a trash bag and leave them in the sun for a few days to bake. That way the caterpillars do not have a chance to move into your soil to pupate. Lightly tilling your garden soil in the fall can reduce the number of squash vine borers the next year by exposing pupae to predators and freezing temperatures.”

4.  If you have chickens, let them clean up your beds each fall and spring to eat the cocoons.

5.  Always rotate your crops.  Never plant squash in the same place for 3 years.  I till my beds in the spring and fall looking for the cocoons.  They tend to be an inch deep.  HERE is a picture of their cocoon.

Join the Conversation:

How do you prevent squash vine borers from killing your plants?

Photo by Jim, the Photographer of the squash borer.

Photo by Raleigh Farms of the eggs.

Disclaimer:  There may be affiliate links in this article.  Monies earned will help to keep Green Talk to continue pumping out awesome content.  Thanks for your loyalty.

Similar Posts:

  • Squash Vine Borer: Ditch the Pesticide. Cut out the Worms.
  • Squash Bug Control: 8 Ways to Kick their Butts in the Garden
  • How to Identify and Remove Squash Vine Borer Worm
  • Get Rid of Squash Bug Eggs with this Simple Hack
  • Bacterial Wilt: Game Over for Squash, Cukes, and Melons

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About Anna

Anna Hackman is the editor of Green Talk, and owner of The Naked Botanical and a avid (okay obsessed) gardener. She also loves video and podcasting and hosts Green Talk TV and Green Talk Radio. Her most important role is being a mother of four boys.

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Comments

  1. 1

    Lin Penrose says

    July 18, 2014 at 2:35 pm

    I recently read on a package of Nasturtium seeds that nasturtiums are good companion plants to repel whiteflies, squash bugs(?), and rabbits. My source is Botanical Interests and they have a .com website. I enjoy Your site very much. Thanks, Lin

    Reply
    • 2

      Anna@Green Talk says

      July 28, 2014 at 10:00 am

      Lin, I have nasturtiums in the beds but maybe not enough? Anna

      Reply
  2. 3

    Jen says

    July 20, 2015 at 1:52 pm

    The eggs on the leaves are actually the eggs of squash bugs, not vine borers. Vine borers lay their eggs in the soil. You still want to destroy the squash bug eggs, too!

    Reply
    • 4

      Anna@Green Talk says

      July 21, 2015 at 10:06 am

      Jen,

      I noticed I posted that. Thanks for the reminder to clarify those eggs. I edited the article.

      Reply
  3. 5

    BERYL HILTON says

    March 1, 2017 at 11:30 am

    Keep the squash vine covered up. At least 8 ” and more. The borer has to start at the bottom of the stalk. I just keep soil piled up on it. A squash borer can only go so deep. This will not hurt the plant. I plant my plants on ground level. Then Keep adding soil. I have not problem with them now. You might find one in a squash now and then. The gel will run out. Hope this helps you. Happy gardening!

    Reply
    • 6

      Anna says

      March 1, 2017 at 3:01 pm

      I grow vertically and found them 2 feet up the vine! I saw how they entered. I do pile dirt on the vines. I also use tin foil but the crows think it is fun to mess with them. You don’t find them in other parts of your vines as they grow? I used to find them way down the line of my vine when I use to grow on the ground. You could see where they entered since you can see the orange stuff. Anna

      Reply
  4. 7

    Darleen Kasunic says

    August 17, 2017 at 12:07 pm

    Will freezing temperatures kill the moths and worms

    Reply
    • 8

      Anna says

      August 28, 2017 at 9:33 pm

      Darleen, the worm usually bore into the soil after they are done killing your squash. Then they emerge as the squash vine buy in the spring. Always rotate your plants from where they grew the year before. Anna

      Reply

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