What Is Eating Holes In My Tomatoes

If you’re finding damaged fruit in your garden, you’re likely asking what is eating holes in my tomatoes. Holes in ripening tomatoes are a frustrating sight, usually created by pests active at different times of the day.

These invaders range from tiny insects to larger animals, each leaving telltale signs. Identifying the culprit is the first and most important step toward an effective solution.

This guide will help you diagnose the problem and provide clear, actionable steps to protect your crop.

To stop the damage, you need to know which pest you’re dealing with. The size, shape, and location of the holes, along with the time of day you see damage, are critical clues.

Some pests chew large chunks, while others bore neat, small holes. Some attack only the fruit, while others also damage leaves and stems.

Here is a detailed breakdown of the most common offenders responsible for holes in tomato fruits.

Tomato Hornworms: The Major Leaf And Fruit Chewers

Tomato hornworms are perhaps the most notorious tomato pest. These large, green caterpillars can strip a plant of leaves and fruit in just a few days.

They are camouflaged perfectly against stems and leaves, making them hard to spot.

Identification: Bright green with white V-shaped marks and a black “horn” on their rear. They can grow up to 4 inches long.
Damage: They create large, irregular holes in fruit and often completely devour leaves, leaving only stems.
Activity: Feed during the day, but are masters of hiding in plain sight.

Tomato Fruitworms: The Internal Bore

Also known as corn earworms or cotton bollworms, these pests are particularly destructive because they bore into the fruit itself.

Unlike hornworms, the damage often starts where the fruit touches the stem or where two fruits touch.

Identification: The caterpillars vary in color from green to brown to pink, with light stripes along their body.
Damage: They create neat, round entry holes, usually near the stem end. Inside, the fruit is hollowed out and filled with frass (excrement).
Activity: Primarily nocturnal feeders.

Slugs And Snails: The Slimy Night Raiders

These mollusks are common in moist, humid gardens. They leave a distinctive slime trail, which is a dead giveaway.

They prefer overripe or damaged fruit but will attack healthy tomatoes, especially those close to the ground.

Identification: Soft-bodied, slimy creatures. Slugs lack shells, snails have coiled shells.
Damage: Create large, ragged holes with smooth edges. The interior of the hole may appear scraped out. Slime trails on the fruit or soil are a clear sign.
Activity: Strictly nocturnal; damage appears overnight.

Cutworms: The Stem And Fruit Cutters

Cutworms are soil-dwelling caterpillars that typically attack young seedlings by cutting them off at the base. However, some species will also climb plants to feed on fruits.

They are most active in early summer.

Identification: Dull-colored caterpillars (gray, brown, black) that curl up when disturbed.
Damage: On fruits, they chew large, irregular cavities, often on the side touching the soil. They may also partially sever the fruit from the stem.
Activity: Feed exclusively at night.

Birds: The Pecking Pests

Birds, especially sparrows and robins, are often overlooked culprits. They are usually attracted to the moisture in ripe tomatoes during dry spells.

Their damage is distinct from insect or slug damage.

Identification: Visual sightings of birds landing on plants.
Damage: Pecked holes that are sharp and conical, like a V-shaped gouge. They often peck at multiple fruits.
Activity: Diurnal (daytime) feeders.

Other Potential Culprits

While less common, a few other animals might be to blame.

Rodents (Squirrels, Rats, Mice): Take large, gnawed bites, often leaving the rest of the fruit. May take entire small tomatoes.
Groundhogs & Deer: Will eat entire fruits and severely damage the plant itself. Deer leave ragged tears from their teeth.
Stink Bugs & Leaf-Footed Bugs: Pierce the fruit with needle-like mouthparts, causing small, yellow, cloudy spots that become hard and white underneath.

How To Identify The Pest Based On Damage

Look closely at the holes and the surrounding area. This quick diagnostic chart can help you narrow down the pest before you even see it.

Large And Ragged Holes

If the holes are big and messy, think big pests.

With slime trails: Slugs or Snails.
Without slime, leaves also eaten: Tomato Hornworm.
On low-hanging fruit, plant stem may be damaged: Cutworm.
Conical peck marks: Birds.
Large gnawed sections: Rodents or larger animals.

Small And Neat Holes

Small, precise holes usually indicate insect borers or suckers.

Round hole near stem, frass inside: Tomato Fruitworm.
Tiny pinpricks with yellow halos: Stink Bugs or similar sucking insects.

Damage Location Clues

Top of plant, sun-exposed fruit: Hornworms, Birds.
Bottom fruit, near soil: Slugs, Snails, Cutworms.
Fruit clusters/stem joints: Tomato Fruitworm.

Immediate Action Steps For Damage Control

Once you spot damage, act quickly to prevent further loss. Here’s what to do right away.

Handpick Larger Pests

For visible pests like hornworms, cutworms, and slugs, handpicking is very effective.

Inspect plants thoroughly, especially at dawn or dusk.
Wear gloves and drop pests into a bucket of soapy water.
For hornworms, look for their dark green droppings on leaves below to find them.

Remove Damaged Fruit

Fruit with holes is an open invitation for secondary infections and more pests.

Pick and dispose of severely damaged fruit. Do not compost them, as pests or diseases may survive.
For minor damage, you can cut out the bad section and use the rest of the tomato quickly if it’s otherwise healthy.

Set Up Barriers And Traps

Create immediate defenses to protect remaining fruit.

Copper Tape: Apply around pots or raised beds to deter slugs and snails (they get a mild electric shock).
Diatomaceous Earth: Sprinkle a ring around plants stems. This powder dehydrates soft-bodied insects. Reapply after rain.
Beer Traps: Sink a shallow container filled with beer into the soil to attract and drown slugs and snails.

Long-Term Prevention And Organic Solutions

Stopping the cycle of infestation is key to a healthy garden next season. Focus on building a resilient ecosystem.

Cultural Practices For A Healthy Garden

Good gardening habits are your first line of defense.

Crop Rotation: Avoid planting tomatoes in the same spot for at least 3 years. This disrupts soil-borne pest life cycles.
Clean Garden Hygiene: Remove plant debris at the end of the season. Till the soil in fall to expose overwintering pupae.
Proper Spacing & Staking: Use cages or stakes to keep fruit off the ground. Good air circulation reduces humidity that attracts pests.
Select Resistant Varieties: Some tomato varieties have thicker skin or are less appealing to certain pests. Research options for your area.

Encourage Beneficial Insects And Animals

Nature provides its own pest control. Attract these helpers to your garden.

Plant Companion Flowers: Marigolds, borage, and nasturtiums can repel some pests and attract beneficial insects like ladybugs and lacewings.
Welcome Birds & Wasps: Install a birdbath to attract insect-eating birds. Braconid wasps are a natural parasite of hornworms; look for their white cocoons on hornworm backs.
Apply Beneficial Nematodes: These microscopic worms, watered into the soil, attack cutworm, and other soil-dwelling pest larvae.

Use Organic Pesticides As A Last Resort

If infestations are severe, these options are effective yet gentler on the environment than synthetic chemicals.

Bacillus thuringiensis (Bt): A natural bacteria that specifically targets caterpillars (hornworms, fruitworms). Harmless to humans, pets, and beneficial insects.
Spinosad: A naturally derived substance effective against a broad range of insects, including caterpillars and thrips. Use in the evening to protect bees.
Insecticidal Soaps & Neem Oil: Effective against soft-bodied insects like aphids and young caterpillars. They must contact the pest directly.

Specific Strategies For Each Pest

Tailor your approach based on the confirmed culprit for maximum effect.

Stopping Hornworms And Fruitworms

Since these are both caterpillars, strategies overlap.

Handpick daily during peak season.
Apply Bt or spinosad according to package instructions, focusing on the underside of leaves.
Till soil deeply in fall and spring to destroy overwintering pupae.

Eliminating Slugs And Snails

Control requires persistence and a multi-pronged attack.

Remove daytime hiding spots like boards, stones, and dense weeds.
Set beer traps or traps made from overturned citrus rinds.
Create barriers with copper tape or a wide band of diatomaceous earth.
Water in the morning so the soil surface is dry by evening, making it less inviting.

Deterring Birds And Rodents

Exclusion and distraction are the best tactics here.

Bird Netting: Drape netting over plants, ensuring it’s secure at the base to prevent entanglement.
Physical Barriers: Use cloches or mesh cages around individual plants or fruits.
Provide Alternative Water: A reliable birdbath can keep birds from pecking tomatoes for moisture.
Harvest Promptly: Pick tomatoes as soon as they ripen to remove the attractant.

Frequently Asked Questions

What Is Making Small Holes In My Tomatoes?

Small, round holes near the stem end are typically caused by the Tomato Fruitworm (corn earworm). Tiny pinprick holes surrounded by a yellow or white spot are usually from stink bugs or leaf-footed bugs piercing the skin to feed.

How Do I Stop Bugs From Eating My Tomatoes?

Start with prevention: use physical barriers like netting, encourage beneficial insects, and maintain garden cleanliness. For active infestations, identify the bug first, then use targeted methods like handpicking, Bt for caterpillars, or traps for slugs. Consistent monitoring is essential.

Are Tomatoes With Holes Safe To Eat?

It depends on the extent of the damage. If the hole is small and you can cut out a generous portion around it, the rest is likely safe. Discard any fruit with signs of rot, mold, or extensive tunneling. Always wash thoroughly before use.

What Animal Is Eating My Tomatoes At Night?

Nocturnal feeders include slugs, snails, cutworms, and some rodents like rats or raccoons. Look for accompanying signs like slime trails (slugs), chewed stems (cutworms), or large bite marks and droppings (rodents). Setting up a motion-activated camera can provide definitive proof.

Will Soapy Water Stop Tomato Pests?

A mild soapy water spray (1-2 tablespoons of pure castile soap per gallon) can be effective against soft-bodied pests like aphids and small caterpillars on contact. It is not a preventative treatment and must be reapplied regularly. Test on a few leaves first to check for plant sensitivity, and avoid using in full sun.