How to Protect Tomatoes from Pests

red and green tomato fruit

Tomatoes are the most popular vegetable in the home garden. They’re relatively easy to grow, and the rewards are great. However, these plants can be subject to pests that can harm the health and yield of your tomato crop. In this article, we will discuss ways to protect your tomatoes from pests, from companion planting to physical barriers to organic and chemical methods.

Why Should You Protect Your Tomato Plants?

Tomato plants can be infested with various pests, such as beetles, aphids, whiteflies, hornworms, cutworms, and caterpillars. These insects can cause damage to your tomato plants in several ways, including eating the leaves, stems, fruit, and seedlings or spreading diseases.

Common Tomato Pests

The tomato hornworm is one of the most destructive insect pests of tomato plants in North America. It can defoliate an entire plant in a matter of days. Flea beetles are small, black, and jump like fleas on the foliage, leaving small holes in leaves. Aphids are tiny, soft-bodied insects that suck the sap of plants, causing curled leaves. Cutworms and caterpillars damage the stem and fruit, causing decay.

Potential Damage to Tomato Plants

The damage caused by pests can reduce the yield of your tomato crop and also result in poor-quality, blemished fruit. In severe infestations, the entire plant can be destroyed. Additionally, some pests can also spread diseases that can infect other plants in your vegetable garden.

Benefits of Protecting Your Tomato Plants

Protecting your tomato plants from pests is essential to ensure a healthy and fruitful harvest. Not only will it help keep bugs at bay, but it will also promote the overall health and growth of your tomato plants.

Companion Plants to Protect Tomatoes

Companion planting involves growing different types of plants close to one another to benefit each other. Some plants can repel pests or attract beneficial insects, while others add nutrients to the soil.


Basil is one of the best companion plants for tomatoes. It can repel tomato hornworms and flies while improving the flavor of the tomatoes.


Marigolds are known to release a chemical into the soil that can repel harmful insects like nematodes. They also attract beneficial insects like hoverflies and parasitic wasps.

Other Companion Plants to Try

Other plants that can help protect your tomatoes include onions, garlic, borage, nasturtium, and parsley. The strong odor of onions and garlic repel pests like aphids, while the flowers of borage, nasturtium, and parsley attract beneficial insects.

Physical Barriers to Protect Tomatoes

Physical barriers can help prevent pests from reaching your tomato plants. Some common physical barriers include cages and supports, row covers, and fencing.

Cages and Supports

Tomato cages and supports provide a stable structure for your plants to grow on while also helping to keep them off the ground. This can prevent pests like cutworms and squirrels from accessing the fruit.

Row Covers

Row covers are lightweight fabrics that can be placed over your tomato plants to protect them from insects. They allow sunlight, water, and air to reach the plants while creating a physical barrier.


Fencing can keep larger pests like rabbits, deer, and squirrels out of your vegetable garden. Make sure the fencing is at least six feet tall and buried underground to prevent animals from digging under it.

Organic Methods to Protect Tomatoes from Insects

If you want to avoid using chemical pesticides, there are several organic methods you can use to protect your tomato plants from insects.

Hand-Picking Insects

One of the most effective ways to control pests is to handpick them off your plants. This method is best for larger pests like caterpillars and beetles that are easily identifiable.

Beneficial Insects

You can attract beneficial insects like ladybugs, lacewings, and parasitic wasps to your garden by planting flowers and herbs around your tomato plants. These insects can help keep harmful pests at bay.

Soapy Water Spray

A soapy water solution can be an effective way to control soft-bodied insects like aphids. Mix a few drops of dish soap in water and spray it on your tomato plants.

Natural Insect Deterrents for Tomato Plants

Several natural substances can deter pests from your tomato plants without harming them.

Crushed Eggshells

Crushed eggshells can be sprinkled around your tomato plants to repel cutworms and other crawling insects.

Cayenne Pepper

Cayenne pepper can be sprinkled on your tomato plants to repel beetles and other pests. It works by irritating their senses.

Diatomaceous Earth

Diatomaceous earth is a naturally occurring rock that contains the fossilized shells of diatoms. It can be sprinkled around your tomato plants to repel pests like ants, snails, and slugs.

Chemical Methods to Control Tomato Pests

If you have a severe pest infestation, you may need to resort to chemical pesticides.

Types of Pesticides for Tomato Plants

There are several types of pesticides available for tomato plants, including insecticides, fungicides, and herbicides. Insecticides can help control insect pests like caterpillars and beetles. Fungicides can control diseases like blight and powdery mildew. Herbicides can control weeds that compete with your tomato plants.

When to Apply Pesticides

Pesticides should be applied at the first sign of an infestation. Follow the instructions on the package carefully, and wear protective clothing, gloves, and a mask when applying pesticides.

Safety Precautions When Using Pesticides

When using pesticides, it’s important to take safety precautions to protect yourself, your family, and the environment. Store pesticides in their original containers, out of reach of children and pets. Always follow the instructions on the label, and never use more than the recommended amount.

Q: What are some common pests that attack tomato plants in the garden?

A: Some common pests that attack tomato plants in the garden are aphids, whiteflies, hornworms, flea beetles, stink bugs, and fruitworms.

Q: How can I protect my tomato garden from insect infestation?

A: There are several ways to protect your tomato garden from insect infestation. You can try planting basil and oregano around your tomato plants to repel certain insects. Additionally, you can add natural predators, such as ladybugs and lacewings, to your garden to help control pests. Using sticky traps and pheromone traps can also help trap and eliminate certain insects.

Q: Is there anything I can do to attract helpful insects to my tomato garden?

A: Yes, there are several things you can do to attract helpful insects to your tomato garden. First and foremost, you should fertilize your plants and keep them healthy and well-nourished. You can also plant flowers, such as geraniums and marigolds, to attract beneficial insects like bees, ladybugs, and lacewings. Finally, you can use insectary plants, such as clover, to attract predators like parasitoid wasps and tachinid flies, which prey on garden pests.

Q: How do I keep bugs from devouring my tomatoes?

A: There are several ways to keep bugs from devouring your tomatoes. You can use insecticidal soap to kill insects like aphids and whiteflies, or you can hand-pluck larger insects like hornworms and fruitworms. Creating physical barriers, such as covering your plants with a cone or bird netting, can also help prevent insect damage.

Q: What are some different methods I can try to protect my tomatoes from pests?

A: There are many different methods you can try to protect your tomatoes from pests. Some of these methods include using netting or chicken wire to create physical barriers, planting cornmeal around the base of your plants to repel cutworms, and using a spray bottle with a mixture of soapy water to kill insects on contact.

Q: Can I plant other crops alongside my tomato plants to repel pests?

A: Yes, there are other crops you can plant alongside your tomato plants to repel pests. For example, planting garlic or onions can help repel aphids and other insects, while planting marigolds can repel nematodes. You can also try planting herbs like basil or mint, which can repel mosquitoes and other insects.

Q: How do I protect my tomato plants from cutworms?

A: To protect your tomato plants from cutworms, you can create physical barriers using cardboard or plastic collars around the base of each plant. You can also try sprinkling cornmeal around the base of your plants, as cutworms are attracted to it and will eat it instead of your plants.

Q: What should I do if my tomato plants are already infested with pests?

A: If your tomato plants are already infested with pests, you should take steps to eliminate the infestation as quickly as possible. First, try using a spray bottle with a mixture of soapy water to kill insects on contact. You can also use insecticidal soap or other organic pesticides to kill pests. If the infestation is severe, you may need to remove the affected plants entirely to prevent the pests from spreading.

Q: How do I keep my tomatoes pest-free without using harmful chemicals?

A: There are many ways to keep your tomatoes pest-free without using harmful chemicals. Some of these methods include using physical barriers like bird netting or fishing line, creating companion plantings with other crops that repel pests, and using natural predators to control insect populations. You can also use natural pesticides, such as neem oil or insecticidal soap, to kill pests without harming the environment.

Q: What can I do to ensure that my tomato plants are healthy and produce luscious fruit?

A: To ensure that your tomato plants are healthy and produce luscious fruit, you should fertilize your plants regularly with a balanced fertilizer that contains nitrogen, phosphorus, and potassium. You should also water your plants regularly and make sure they receive plenty of sunlight. Finally, you should prune your plants regularly to promote airflow and prevent disease.

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