The 15 Most Common Pests Damaging Tomato Plants

Dwarf tomato plant in a pot with ripe and unripe tomatoes, variety Red Robin
AngieC333/Shutterstock.com

Written by Nina Phillips

Published: June 18, 2024

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Tomatoes are rather easy to grow, especially in warmer climates. They can come back several years in a row and leave you with plenty of these delicious fruits over the summer. Unfortunately, though they’re easy to care for, certain pests make the job harder. Some of the most common pests can destroy a tomato plant in a matter of days.

Before starting your garden, it’s a good idea to understand some of the most common pests of tomato plants. That way, if you notice something attacking your plant, you can identify it quickly and work on removing it from your garden. The 15 pests below are some of the most common and can cause the most damage.

Continue reading to learn about the most common pests and the best way to remove them from your garden before they start causing problems. That way, you can keep your tomato plants growing all summer, and possibly into the next year.

1. Aphids

Aphids damage pretty much any plant they come in contact with and attract ants.

How to Get Rid of Them: These soft bugs are easy to squish. If that grosses you out, ladybugs and green lacewings do a good job of killing them off.

2. Tomato Fruitworms

Helicoverpa zea, corn earworm

Also called corn earworms, these caterpillars eat tomatoes, peppers, and corn.

How to Get Rid of Them: Pick off the eggs and caterpillars any time you see them. Wasps and orius bugs also feast on these insects, so they’re good to keep around.

3. Tarnished Plant Bug

Though these bugs are hard to see, they have pretty distinct damage patterns of black spots on leaves and stems and cloudy spots on the fruits.

How to Get Rid of Them: Remove nearby weeds and allow predatory insects to make their home in your garden. Also, planting garlic nearby can keep them away.

4. Whiteflies

These little white bugs spread diseases and damage leaf tissue.

How to Get Rid of Them: The best way to keep these pests from killing your plants is to keep your tomatoes happy and healthy.

5. Stalk Borer

Extreme macro worm caterpillar bug insect (Papaipema nebri)

As their name suggests, stalk borers dig into the stem of a plant and eventually kill it.

How to Get Rid of Them: Unfortunately, once infested, quick removal of the plant is the only way to stop these pests from spreading. Use plenty of mulch and kill any nearby weeds to keep them far away from your garden.

6. Leaf Miners

Close up of an Eggplant (Solanum Melongena) pest infected leaf which damaged by the serpentine leaf miner (Liriomyza Brassicae)

Leafminers are so-called because of the white trails they create on leaves.

How to Get Rid of Them: Sticky traps around tomato plants help catch adults before they lay their eggs on the leaf.

7. Spider Mites

Spider mites are small and hard to see with the naked eye, but may create white spots on the top of tomato leaves.

How to Get Rid of Them: These mites prefer tressed plants, so keeping your tomatoes happy and healthy is key.

8. Stink Bugs

Stink bugs damage fruits by stabbing the plant and sucking out the insides.

How to Get Rid of Them: Keep your garden clean and tidy in the winter to prevent any from moving in and making nests when it’s cool.

9. Blister Beetles

Blister beetles aren’t only dangerous to your plants, but to you as well.

How to Get Rid of Them: Birds love these beetles, so letting them roam free is a good idea, or you can pick them off with gloves.

10. Root-Knot Nematodes

Root-knot nematodes can cause swellings or galls on chili plant roots.

Nematodes are found in places with short winters and hot summers.

How to Get Rid of Them: Planting marigolds around your tomato plants is one of the best options. For indoor plants, total sanitation of gardening tools, puts and soil is required.

11. Leafhoppers

leafhopper Philaenus spumarius, the meadow froghopper or meadow spittlebug macro photo, isolated outdoor. photo taken in the united kingdom.

Leafhoppers only attack tomato plants on occasion but can cause problems if not handled immediately.

How to Get Rid of Them: Neem oil spray, insecticidal soap, and diatomaceous earth are three of the best ways to get rid of leafhoppers.

12. Hornworms

Despite their size,

hornworms

may be hard to see because they blend in with tomato plants.

How to Get Rid of Them: The fastest method is to pick them up by hand and drop them in soapy water.

13. Snails and Slugs

Snails and slugs only really start to cause problems when there are too many in one space.

How to Get Rid of Them: For the most part, birds and other animals will control the populations, but picking them up by hand is another solution if there is an abundance.

14. Flea Beetles

While flea beetles rarely kill tomato plants, they can do a lot of damage.

How to Get Rid of Them: Basil and nasturtiums are natural repellents but sticky traps and diatomaceous earth also do well at repelling these insects if used correctly.

15. Colorado Potato Beetle

Despite their name, these beetles are found all across North America and cause serious damage to all nightshade plants.

How to Get Rid of Them: The best way to remove them is to remove the adults by hand and place them in soapy water.


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About the Author

Nina Phillips

Nina is a writer at A-Z Animals, FIDIS Travel, and Giant Freakin Robot. Her focus is on wildlife, national parks, and the environment. She has been writing about animals for over three years. Nina holds a Bachelor's in Conservation Biology, which she uses when talking about animals and their natural habitats. In her free time, Nina also enjoys working on writing her novels and short stories. As a resident of Colorado, Nina enjoys getting out in nature, traveling, and watching snow hit the mountains from her enclosed porch.

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