How to Make Natural Bug and Worm Repellents for Your Tomato Plants

Hunker may earn compensation through affiliate links in this story.

Things You'll Need

  • Garlic

  • Mild dish soap

  • Hydrogen peroxide

  • Baking Soda

  • Olive oil

  • Water

  • Sugar


Always protect your eyes when dusting or spraying plants.

Make Natural Bug and Worm Repellents for Your Tomato Plants

Natural bug and worm repellents for tomato plants are growing in popularity as people become more aware of the toxins in traditional products. Nothing is more discouraging than to go out to your garden and find those big green hornworms munching away on your beautiful tomatoes! The same goes for some of the primary pesky bugs like aphids, thrips, spider mites, whiteflies, and leafhoppers that devour the plant and leaves overnight or leave it looking half dead. There are probably things in your kitchen or bathroom right now that will work efficiently to make a natural repellent.

Step 1

Tomato plant hornworm

Find out what is Bothering Your Tomato Plant

Look on the upper part of the plant, leaves and green fruit to see if there are large amounts consumed as the hornworm will devour all of this. This caterpillar looking green hornworm gets its name from the fact that it has a black horn on the head.

Aphids are little yellowish, rice shaped bugs that multiply quickly and eat the tomato plant leaves but the main damage they cause is the transmission of plant viruses.

Thrips are brown little winged bugs that feed on the leaves as well and cause discoloration and damage to it. Spider mites are tiny, oval shaped, greenish yellow bugs that feed on the underside of the leaves and make webs on them causing discoloration and damage to them.

Whiteflies feed on the underside of leaves and drain the tomato plant of their life if there are enough of them. Leafhoppers are brownish colored bugs that can jump and hide very well and prefer to suck the sap out of the plant or eat the tomatoes.

Step 2

Deal with the Hornworm

Dealing with the hornworm can be a challenge but there are some natural remedies that have worked quite well and can be made very inexpensively. The main way many gardeners deal with the tomato worm is to simply remove them and do away with them or feed them to any available chickens.

Another effective way to repel them is to sprinkle cornstarch on and around the tomato plant as this will suffocate the worms. You can also sprinkle a natural powder product called diatomaceous earth on the plant and soil around it to repel these worms as well as other predators.

Step 3

Make a Garlic Repellent

Garlic is a natural repellant that can be made by mixing one clove of crushed garlic with a quart of water and a dash of hot pepper sauce together and spraying on the plant to repel these pests.

Step 4

Make a Dish Soap Repellent

Put 1 tablespoon of a mild liquid detergent into a spray bottle of water and spray the plants with it and watch it work effectively on a variety of bugs as well as being very safe.

Step 5

Mix up a Hydrogen Peroxide Repellent

Mix 8 ounces of Hydrogen Peroxide, a gallon of water and 8 ounces of sugar together for a long lasting formula and spray on both sides of the tomato plant and leaves.

Step 6

Use Baking Soda

Mix up 1 tablespoon of baking soda, ½ teaspoon mild detergent and 2 ½ tablespoons of olive oil in a gallon of water to make a repellent for all kinds of bugs as well as a fungicide for blight and mildew on the tomato plant leaves. Shake it well before spraying and repeat every week for it to be effective.

Step 7

Apply Repellent at the Right Time

First test spray a small portion of the plant or leaf and wait overnight to see how it fares. Always spray your tomato plants early in the morning or the cool evening to avoid burning them or having a bad reaction because of the heat. Do not add more spray or increase the strength if you are not getting good results as this may harm the plant and drive away the good bugs that eat the predators. Experiment with different repellents to see which one works best for your plants.