Nothing is a bigger garden bummer than to have big beautiful squash or zucchini plant suddenly die. One day your plant is big and bountiful and the next it looks as though it hasn’t been watered in weeks.
What looks like lack of water may actually signal the death of your plant by the dreaded squash vine borer. If you’re looking for how to grow these plants, then check out my guide on How to Plant and Grow Squash and Zucchini.

What are Squash Vine Borers?
The plague that is the vine squash borer takes what appears to be a perfectly healthy plant and completely destroys it. These borers do exactly what their name implies.
They lay eggs at the base of the plant, and once the eggs hatch, they bore into the base of the plant and feast until the plant dies. You can see in the picture below how tiny a squash vine borer egg really is.

Lack of water or vine borers?
What you may initially think is a plant drooping for lack of water, may be these pesky plant eaters. Typically squash and zucchini are affected and once robust leaves will suddenly be dropping.
How you can tell if what you’re seeing is lack of water or actually vine borers? Well, unlike a droopy under-watered plant, you may see a small hole at the base of your plant. Frass, or poop, from the vine borer will be crusted around this tiny hole around the base of the plant.
If you notice this crusty deposit, then chances are, you’re dealing with vine borers. But all is not lost! It’s still possible to save your plant from these spring and summer pests. But let’s first talk about prevention.
If you’re looking for natural pest control methods, then be sure to check out my book Natural Pest Control Methods for the Home Garden. It’s a great reference for treating all kinds of garden pests without harsh poisons!

How to Prevent Squash Vine Borers
Plant squash and zucchini plants in a new location. If you’re a creature of habit, it’s time to add some change to your garden. Plant your squash and zucchini (both hollow stemmed plants) in a new location.
You want to avoid those dormant vine borers from attacking your new plants. Vine squash borers are only after your hollow stemmed plants, so plant cucumbers or peppers where your squash were last year as these plants won’t be affected by vine borers.
Wrap the bottom of your squash and zucchini transplants with Ace Bandage. This way, even if the eggs are laid at the base of your plant, they cannot penetrate the bandage to feast on the plant itself.
Ace bandage does a good job of sticking to itself, so there’s no need to wrap it incredibly tight. You want your plant to still be able to grow, so be sure to check the bandage each week or so and loosen as necessary. (Also be sure to add more bandage as the plant grows.) I’ve also seen folks use this wrapping method with aluminum foil.
Wipe the stems. Keep a watch at the base of your plants. If vine squash borers have been an issue for you in the past, keep an eye out. Whenever you’re working in the garden, simply wipe or rub the bottom of your plants to get rid of any eggs that may be there.
Charcoal in the soil. In a past Southern Exposure Seed Exchange catalog, they recommend mixing a small amount of charcoal in with the soil where the zucchini and squash are planted. This helps reduce their numbers. Or you can place boards around the base of your plants in the evening, and in the morning, lift the boards to find the borers underneath. Then get rid of them.
Dixie Cups Collars– Yankee Homestead has a great video about using simple Dixie cups to prevent the vine borer moth from laying eggs. Simply pop out the bottom of a dixie cup and use it as a collar around the base of your plant. This will prevent the borer moths from being able to land and lay eggs supposedly. I will definitely be trying this method next year.
I’ve tried almost all of these methods over the years, and as for prevention, I have found that crop rotation (rotating where I’ve planted squash) and wiping the bases of the plants to be the most effective.
Can vine borers be removed from plants?
Yes, It is possible to remove the borers once they’ve gotten inside the plant. Here’s what you’ll need:
- Small sharp knife
- Jar with soapy water
Removing vine borers from a plant requires a small vertical incision in the stem, and removal of the borers by hand. It’s not ideal, but if you find yourself with borers already in the plant, it may be possible to still remove them.
I’d love know if you’ve dealt with the pesky vine borer in the past and if you have any tried and true methods for keeping them away from your precious plants. Have a great week and Happy Gardening!
Dormant Vine Borers
To add insult to injury, these squash vine borers can lay dormant in the dirt for the next season, where the cycle repeats itself. This is why it’s important to treat affected plants and to get rid of them if the plant becomes infested.
Not planting your squash in the same place year after year will also help in case some did make it into the soil.
Squash Vine Borer FAQ
Does Neem Oil kill squash vine borers? Yes, it can kill the newly emerged borers if it’s applied to the base of your plant. However, it’s not the most effective method, as neem oil can easily wash away and would need to be applied frequently. It also wouldn’t help for those who have already moved into the plant.
Are squash vine borers and squash bugs the same thing? No, but that’s a common question. Squash bugs are typically found on the plant itself, not the inside and have a shield shaped body. They also lay eggs on the underside of leaves in a patterned cluster. They can do a lot of damage, but are much easier to spot than vine borers.
Do squash vine borers attack all varieties of squash? No, they only focus on the hollow stemmed varieties like summer squash and zucchini. They avoid the thicker stemmed butternut and winter squash varieties.
Can traps be set for the squash borer moth? I have heard of setting out bright yellow bowls that mimic the flowers of the squash plant, but haven’t seen any conclusive results. Burpee also offers a vine borer moth trap that hangs away from your plants and is said to attract the moths with pheremones. It has some mixed reviews.
As always, if you have any tips that have helped you prevent or deal with existing squash vine borers, then feel free to leave a comment below.
How to Prevent and Treat Squash Vine Borer

Learn how to find eggs of the squash vine borer on your plant, so you can get rid of them before they completely destroy your squash or zucchini plants. This will help your spring and summer vegetable garden thrive.
Materials
- Ace Bandage
- Dixie Cup
- Aluminum Foil
Instructions
Plant squash and zucchini plants in a new location. If you're a creature of habit, it's time to add some change to your garden. Plant your squash and zucchini (both hollow stemmed plants) in a new location.
You want to avoid those dormant vine borers from attacking your new plants. Vine squash borers are only after your hollow stemmed plants, so plant cucumbers or peppers where your squash were last year as these plants won't be affected by vine borers.
Wrap the bottom of your squash and zucchini transplants with Ace Bandage. This way, even if the eggs are laid at the base of your plant, they cannot penetrate the bandage to feast on the plant itself.
Ace bandage does a good job of sticking to itself, so there's no need to wrap it incredibly tight. You want your plant to still be able to grow, so be sure to check the bandage each week or so and loosen as necessary. (Also be sure to add more bandage as the plant grows.) I've also seen folks use this wrapping method with aluminum foil.
Wipe the stems. Keep a watch at the base of your plants. If vine squash borers have been an issue for you in the past, keep an eye out. Whenever you're working in the garden, simply wipe or rub the bottom of your plants to get rid of any eggs that may be there.
Charcoal in the soil. In a past Southern Exposure Seed Exchange catalog, they recommend mixing a small amount of charcoal in with the soil where the zucchini and squash are planted. This helps reduce their numbers. Or you can place boards around the base of your plants in the evening, and in the morning, lift the boards to find the borers underneath. Then get rid of them.
Dixie Cups Collars- Yankee Homestead has a great video about using simple Dixie cups to prevent the vine borer moth from laying eggs. Simply pop out the bottom of a dixie cup and use it as a collar around the base of your plant. This will prevent the borer moths from being able to land and lay eggs supposedly. I will definitely be trying this method next year.
Notes
Try several methods for best results. What has worked best for us is wiping stems and moving the plants from year to year.
Karen
Sunday 26th of March 2023
Borers will also lay eggs along the vine and not just at the stem. I have tried the foil and the dixie cups - neither work because they will lay them along the length of the stem. I have completely hacked away 1/2 of a stem and found 3-4 borers in one place. After destroying the borers ( I hacked them in half ) I stuffed the stem with potting soil and the stem healed and I got a bunch of squash from that same plant so you can save your plants :) all is not lost.
Courtney
Monday 27th of March 2023
Hi Karen, you are exactly right. I've even seen the borers lay eggs on the leaves, though those don't usually pose too much of an issue from what I've seen. The BT and simply wiping and watching for eggs seems to be the most effective for me overall. Thank you so much for stopping by!
Monica L Gregory
Saturday 9th of July 2022
Is there anyway to treat your soil for the eggs, to kill them before they hatch? Or to kill the larvae?
Courtney
Tuesday 12th of July 2022
Great question, Monica! Turning over the soil and exposing any eggs to the air is a good way to get rid of them. I also wonder if mixing in some diatomaceous earth to the soil would also work. Hope this helps!
Kathleen Herman
Friday 10th of June 2022
Do you know if laying diatomaceous earth on a consistent basis will help with the borers? I know that this is not an ideal practice, and I wouldn't use it for anything else except for my squash plants, but maybe it would help since they come from the ground.
Courtney
Wednesday 15th of June 2022
Hi Kathleen! Great question... The DE only works if it gets on the borer itself, so I'm wondering if you coat the bottom of the plant if that would work. I think it's great in theory, and I'd love to know if you try it out!
Deb
Friday 15th of April 2022
Thinking of using A container and covering with netting. Thoughts?
Courtney
Friday 15th of April 2022
Hey Deb! Yes, I've done this especially with tomatoes. I use landscape pins to hold the fabric to the ground.
Ashley
Sunday 27th of March 2022
I have had this problem the last 2 years of planting zucchini and yellow squash. I was only able to get 2 zucchini off my plants last year. Does planting in containers help?
Courtney
Monday 28th of March 2022
Hi Ashley! Great question. Containers may help in that you won't be planting in the same place as last year, since vine borers overwinter in the soil. However, since the moth is what lays the eggs, then you would still want to check the plant stem for the tiny eggs every few days. I hope this helps!