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How to Naturally Eliminate Squash Bugs Using a Water and Dish Soap Solution

Updated: May 28

Gardening can be a peaceful and rewarding activity, but it also comes with its fair share of challenges, especially when it comes to pests. Squash bugs are one such nuisance, known for their ability to wreak havoc on squash plants, cucumbers, and other members of the cucurbit family. Fortunately, there is a simple, all-natural solution that can help you manage these pests without resorting to harsh chemicals. In this blog post, we'll explore how to use a mix of water and dish soap to effectively kill squash bugs and keep your garden healthy.

Understanding Squash Bugs

Squash bugs (Anasa tristis) are common garden pests that primarily attack squash, pumpkins, cucumbers, and other cucurbit plants. These pests suck the sap out of the leaves, causing them to wilt and eventually die. The adult bugs are shield-shaped and about 5/8 inch long, while their eggs are small, bronze-colored, and often found in clusters on the underside of leaves.

Whenever you see these on the underside of your leaves, you've got squash bugs!

Why Choose an All-Natural Solution?

Using chemical pesticides can be effective, but they often come with drawbacks such as harming beneficial insects, contaminating the soil, and posing health risks to humans and pets. An all-natural solution like water and dish soap is non-toxic, environmentally friendly, and safe to use around your home and garden.

The Water and Dish Soap Solution

The mixture of water and dish soap works by damaging the protective outer layer of the squash bugs, causing them to dehydrate and die. Here's how you can create and use this simple yet effective solution:

Materials Needed:

  • A spray bottle

  • Water

  • Mild liquid dish soap (preferably biodegradable and free from harsh chemicals)


  1. Prepare the Solution: Fill the spray bottle with water, leaving some space at the top. Add a few drops of mild liquid dish soap. The ratio should be about one tablespoon of soap per quart of water. Gently to mix the solution.

  2. Identify the Bugs: Carefully inspect your plants for squash bugs, focusing on the undersides of leaves where they tend to hide and lay eggs.

  3. Apply the Solution: Spray the solution directly onto the squash bugs. Ensure that you cover the bugs thoroughly. The soap will break down their exoskeletons, causing them to dehydrate and die. Be sure to also spray any eggs you find, as the soap solution can prevent them from hatching.

  4. Repeat as Necessary: It's important to monitor your plants regularly and reapply the solution as needed. Squash bugs can be persistent, so consistency is key to keeping their population under control.

  5. Prevent Future Infestations: After dealing with the immediate problem, take steps to prevent future infestations. Remove any plant debris from your garden, as squash bugs often overwinter in these materials. Additionally, consider using floating row covers to protect your plants from new invasions.

Additional Tips

  • Test First: Before applying the solution to your entire plant, test it on a small section to ensure it doesn't cause any damage.

  • Morning or Evening Application: Apply the solution in the morning or evening when temperatures are cooler to prevent any potential leaf burn.

  • Regular Inspection: Regularly inspect your plants to catch any new infestations early and take action promptly.

  • Add Alcohol: If you need an extra kick, add a small amount of rubbing alcohol to your solution. Try to apply the solution at night or on a cloudy day when the sun is mild. This can help kill the eggs, in addition to the squash bugs themselves.


Managing squash bugs doesn't have to involve toxic chemicals. With a simple mixture of water and dish soap, you can effectively eliminate these pests and enjoy a healthy, thriving garden. This natural solution is not only safe for your plants but also for you and the environment.

If you have any other natural pest control tips, feel free to share them in the comments below!

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