How to Get Rid of Tomato Hornworm


Are you a gardener struggling with tomato hornworms wreaking havoc on your plants? Don’t worry, you’re not alone! These pesky pests can quickly decimate your tomato plants if left unchecked.

In this guide, we will discuss effective methods to get rid of tomato hornworms and protect your precious garden. So, let’s dive in and reclaim your tomato plants!

Understanding Tomato Hornworms

Before we jump into the solutions, let’s take a moment to understand what tomato hornworms are and why they pose a threat to your plants.

Tomato hornworms are large, green caterpillars with distinct markings and a horn-like protrusion on their rear end.

They are the larvae of the Sphinx moth and primarily feed on plants from the Solanaceae family, including tomatoes, peppers, and eggplants.

These voracious eaters can quickly defoliate your plants, leaving behind bare stems and stripped leaves.

If left untreated, tomato hornworms can cause significant damage and even kill your plants. Therefore, it’s crucial to identify and eliminate them as soon as possible.

Signs of Tomato Hornworm Infestation

To effectively combat tomato hornworms, you need to be able to identify their presence in your garden. Here are some signs that indicate a tomato hornworm infestation:

  1. Defoliation: If you notice large sections of your tomato plant’s leaves missing or partially eaten, it’s a clear sign of hornworm activity.
  2. Frass: Tomato hornworms leave behind dark green or black droppings, known as frass. Look for these droppings on the leaves or the ground around your plants.
  3. Hornworms: The caterpillars themselves are usually green, about 3-4 inches long, and have white V-shaped markings on their sides. Look for them on the stems or the undersides of leaves.

Natural Methods to Get Rid of Tomato Hornworms

Now that you can identify tomato hornworms, let’s explore some natural methods to eliminate them from your garden.

These methods are safe for your plants, beneficial insects, and the environment:

1. Handpicking

One of the most effective ways to control tomato hornworms is by handpicking them off your plants. Wear gloves and carefully inspect your plants, removing any hornworms you find.

Remember to check the undersides of leaves and the stems, as they often blend in with the foliage. Dispose of the hornworms in a bucket of soapy water to ensure they won’t return.

2. Attract Beneficial Insects

Encouraging natural predators of tomato hornworms, such as parasitic wasps and braconid wasps, can help control their population.

Planting flowers like marigolds, dill, and fennel can attract these beneficial insects to your garden.

Additionally, avoid using broad-spectrum insecticides that can harm these helpful creatures.

3. Introduce Bacillus thuringiensis (BT)

Bacillus thuringiensis (BT) is a natural soil bacterium that produces proteins toxic to certain insects, including tomato hornworms.

BT is available in powder or liquid form and can be sprayed directly on your plants. When the hornworms ingest the BT, it disrupts their digestive system, eventually leading to their demise.

4. Neem Oil Spray

Neem oil is a natural insecticide derived from the neem tree. It acts as a repellent and disrupts the feeding and reproductive cycles of tomato hornworms.

Mix neem oil with water according to the instructions on the product and spray it on your plants, focusing on the undersides of leaves where the hornworms often hide.

5. Companion Planting

Companion planting involves strategically placing certain plants together to benefit each other.

Planting herbs like basil, mint, or borage near your tomato plants can help repel tomato hornworms.

The strong scents of these herbs confuse and deter the pests, reducing the likelihood of an infestation.


Tomato hornworms can be a frustrating challenge for gardeners, but with the right strategies, you can effectively control their population and protect your tomato plants.

Remember to regularly inspect your plants, handpick any hornworms you find, and implement natural methods like attracting beneficial insects, using BT, neem oil spray, and companion planting.

By taking proactive measures, you can enjoy a bountiful harvest of delicious tomatoes without the interference of these destructive pests.

Frequently Asked Questions

How do I prevent tomato hornworms in the first place?

To prevent tomato hornworms, practice good garden hygiene by removing plant debris and weeds regularly.

Additionally, consider using floating row covers to physically block the adult moths from laying eggs on your plants.

Are tomato hornworms harmful to humans?

No, tomato hornworms are not harmful to humans. While they may startle you with their size and appearance, they do not bite or sting.

However, it’s advisable to wear gloves when handling them to avoid any potential skin irritation.

Can I use chemical insecticides to control tomato hornworms?

While chemical insecticides can be effective against tomato hornworms, they can also harm beneficial insects and disrupt the ecological balance in your garden.

It’s best to exhaust natural control methods before resorting to chemical options.

How long does it take for tomato hornworms to mature?

Tomato hornworms go through several instars (growth stages) before pupating.

The entire process, from egg to adult moth, typically takes around 4-6 weeks, depending on environmental conditions.

Can tomato hornworms damage plants other than tomatoes?

Yes, tomato hornworms can also feed on other plants from the Solanaceae family, such as peppers, eggplants, and potatoes. Keep an eye out for their presence on these plants as well.

What should I do with the hornworms I remove from my plants?

After handpicking the hornworms, it’s best to dispose of them in a bucket of soapy water. This ensures they won’t return to your garden and cause further damage.

Alternatively, you can feed them to chickens or birds if you have them in your vicinity.

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