Read more

Where Does Tomato Hornworm Come From

Where Does Tomato Hornworm Come From?

Hornworms might be attacking your tomatoes, and you are wondering where does tomato hornworm come from?

Tomato hornworms are green devouring caterpillars that can cause serious harm to your tomatoes if not controlled on time. This is why we have put together this informative article to inform you where this tomato hornworm comes from. We will also guide you on ways to control these worms.

Get To Know Where Tomato Hornworm Come From

Tomato hornworm comes from eggs that are laid by large mottled gray-brownish moths. These moths lay their eggs on their host plant (tomato) during summer. Tomato hornworm pupae thrive during winter and surface as brown moths during spring.

Hornworms are one of the largest caterpillars known. Once these moths lay their eggs, the caterpillar will hatch out of the eggs. They will begin to feed until they increase in length of up to 4 inches.

Afterward, the caterpillar moves into the soil where it turns into its pupa stage.

Sign of Hornworm Infestation

The first sign of hornworm infestation is when you notice the stems of your tomato plants are leafless. The awful part is that hornworms won’t just feed on patches of your tomato leaves. They have the ability to devour your whole leaves in just a night.

Tomato hornworms begin by feeding on the upper part of your plant leaves. After consuming your tomato leaves, they can proceed to feed on your flowers and fruits.

Tomato Hornworm Elimination

As they mature and grow bigger, the damage they cause to your tomato leaves increases.

The tomato hornworms have the ability to camouflage with their green appearance. Therefore, you might not spot them on time until they have done their harm. You can catch them doing their notorious operations when the sunsets (in the dark).

How To Get Rid Of Tomato Hornworms

Here are the elimination methods of tomato hornworm:

  • Hand-picking and drowning: handpicking and drowning them in a bucket of water is the most effective and safe way of eliminating these worms.
  • Natural predators: some natural predators can be introduced in eliminating these tomato hornworms. Examples of these natural predators are green lacewings and ladybugs. These predatory insects will feed on the eggs and young caterpillars of the moths.
  • Bacillus thuringiensis (Bt): introducing bacillus thuringiensis into your soil can also help eliminate tomato hornworm. Hornworm caterpillars will need to feed on this Bt to be effective.
  • Nonsystematic insecticides: nonsystematic insecticides are also effective in killing tomato hornworms. The plant will not absorb the insecticides, they will only stay on the surface where these worms will be killed when they come in contact with it.

Monterey LG6130 Garden Insect Spray

Read more about The best Soil for Tomatoes

Additional Note

To ensure you protect your tomato plant from hornworms do the following:

  • Always inspect your tomato plants for hornworms during summer.
  • If you see any worms on your plant, pick them or hose them away and kill them by putting them inside soapy water.
  • Ensure to always till the soil after harvest and also in early spring to destroy any burrowing larvae and caterpillars.

Hornworms are not only seen in tomatoes. They can also be found on pepper, eggplant, and potato.


Where does the tomato hornworm live?

The hornworm is a type of caterpillar that eats the leaves of tomato plants. It can be found in many places in North America and Europe. They are usually found on the ground or in cracks and crevices. They are often found in the inner layer of leaves attached to tomato plants and other plants in the family Solanaceae.

The tomato hornworm is an insect that has a long, yellow-green body with two horns curving up from its head and it feeds on the leaves of tomatoes. Hornworms also have long black legs with orange hairs called spines at their ends.

They lay their eggs on the leaves of plants and adults feed on larvae and plant sap in the first three to four days after they hatch. They then emerge as adults during August and September when they spend most of their time looking for mates or feeding on other insects.

Are hornworms really bad for tomatoes?

More specifically, tomato hornworms are not considered a serious pest in their own right because they do not affect the overall health of your garden.

Tomato hornworms are also called tobacco hornworms and can become quite large in size with a span of up to three inches long. There are many different types of tomato varieties that can grow to accommodate these pests. However, you should use traps or insecticides to get rid of them before they destroy the entire crop.

The red hornworm is one of the most common tomato pests. This pest can destroy a tomato plant in about five days.

It’s possible that people are exaggerating the effects of this pest and that they may not be as bad as they are made to seem.

How do I keep hornworms off my tomato plants?

Keeping hornworms off your tomato plants is an on-going battle. When the plants grow up, hornworms will start coming up from the ground underneath your plants. If you leave them be, they will inhabit the lower leaves and cause damage to the plant's health before it's too late.

Hornworms attack through their mouthparts, which have long spines that penetrate the tomato leaves or fruit. They also have bristles that pierce the plant's vascular system. There are some natural pesticides you can use for population control, like neem oil and pheromones. You can use a predator such as pirate bugs or lady beetles to combat this pest problem in your garden.

Choosing what method will work best for you depends on the type of tomato plants that you grow. Although all methods listed can be used with any type of tomato plant, some are more effective against particular types of pests.

Hornworm prevention methods include: using a floating row cover over your plants; using a floating row cover with a row of reflective ribbon attached; using an individual tomato cage trap; using an individual tomato cage trap with pheromone pellets; hand picking them off your plants or even killing them with insecticides.