Black caterpillars on tomato plants are the ones that leave our garden favorites decimated and unable to produce those lovely summer fruits. And you’ll be surprised to find that’s not just the one specie of worms you’re dealing with — a few possible culprits can crawl on your tomato plant.Black Caterpillars on Tomato Plants

But don’t worry, it’s easy to get rid of them once you understand who they are, so find out as you read on.

Why Black Caterpillars Attack The Tomato Plants?

Black caterpillars attack the tomato plants because the plant is a good source for the bugs. In addition, you can also see them as they would come to the chewed and distorted leaves, and lastly, because they find sheltering haven,

But you’re usually dealing with a type of hornworm, armyworm, or tomato fruitworm caterpillar. Coping with these caterpillar pests in the garden is a common routine for tomato growers. Growing tomatoes is a bit more challenging when black pests are around them, as these voracious feeders can target both leaves and fruit, causing substantial damage that impedes plant growth.

Note the caterpillar’s color, patterns, shapes, and size. This information will help with identification and eradication. Prevention is always key when you’re dealing with these crawling killers. But before we even address the action plan, let’s see why these attack and how to identify their presence!Black Tomato Caterpillars

– Food Source

Caterpillars, in addition to some black worm, have quite the vegetarian appetite — they’re all about munching on plants. Tomato plants are like a big leafy buffet for them, loaded with the nutrients they crave, so they would find them and feed on them.

Tomatoes are themselves at fault, as they’re sending out chemical signals that attract caterpillars, especially tobacco hornworms. These chemicals serve as protection from some species but are irresistible for worms because they are nutritious for them.

Butterflies and moths usually select tomato plants as the perfect construction site for their soon-to-be-hatched babies. They use these plants to lay their eggs, knowing that once the eggs hatch, their tiny occupants will have protection and plenty of food to develop.

The best thing is to always keep an eye out for the indicators. Caterpillars leave behind telltale droppings and cause noticeable damage as they eat tomato plants.

In short, you will typically find chewed and holed leaves, and the damage will progress in a way that would suggest something is eating away at your plant. Many caterpillars hide during the day and emerge to feed at night.

– Chewed and Distorted Leaves

You may have a caterpillar culprit if you spot leaves with irregular, chomped-up edges or holes that look like a miniature punch card. They need to be more neat eaters, leaving behind a signature pattern of ragged edges that’s a dead giveaway.

Caterpillars aren’t picky — they might also take a bite out of stems, as they see that the leaves are already ruined, they will try to target the tomato even more, and as a result, you should start to look for twisted or contorted stems. These odd shapes are like neon signs pointing to caterpillar hideouts, as they are attracted to the damage.

If you spot punctures, gouges, or partial chunks missing from tomato fruits, you’ve got caterpillars staging a fruit feast, which has increased in the longer run. They don’t discriminate between leaves and fruits, leaving behind their mark of mismatched bites.

If you’re determined that worms are munching away at your plant, grab a flashlight and head to your garden at night. Some caterpillar species, like the tomato hornworms, are nocturnal, coming out to snack under darkness, and you might catch them near the pre-damaged leaves.

There’s no master blueprint for caterpillar mischief, as different species might leave slightly other marks. But if you find chewed, twisted, and munched on plants for no apparent reason — chances are you’ve got caterpillar pests in your garden.

– Sheltering Haven

Occasionally, you might encounter the caterpillar culprits directly — those miniature plant-munching adventurers failed to escape before dawn. These caterpillars are a diverse bunch, each flaunting their unique style. In such a matter, tomato hornworms are largely similar, flashing distinctive sharp horns on their green bodies, while tomato fruit worms tend to be translucent with shifting hues of gray and brown.

Examine the leaves, stems, and ground beneath your tomato plants to spot frass. Look for small, dark dots – they might resemble crushed black pepper or tiny ink splatters. That’s frass and the sign that caterpillars are having a garden feast.

When the overall health of your tomato plant takes a hit, and the repercussions extend beyond aesthetics, then it’s an obvious sign that the plant is under attack by these voracious eaters. Fruits might shrink back, reducing their yield and potential juiciness.

How To Get Rid of Black Tomato Caterpillars Effectively?

To get rid of black tomato caterpillars effectively, you can try to handpick them and invite predator pests to tackle them. Moreover, you should also manage your land and clean it properly, and lastly, you can spray some homemade pesticides.Removing Caterpillar from Tomatoes

– Handpick Them

When combating those pesky black worms on your tomatoes, a hands-on approach is the best — provided you have the stomach. Put on a glove, roll up your sleeves, and start by manually removing any visible caterpillars and eggs you come across. Clean your plants thoroughly to ensure none escape your watchful eye to prevent tomato pest.

For those larvae that evade your sight, a simple solution of dish soap and water becomes your secret weapon. Prepare the mixture and dunk the larvae into it, ensuring their demise.

However, you should also keep in mind that some insect eggs are minuscule, making them virtually invisible. In such cases, take a damp cloth and gently wipe the leaves of your plants to eliminate any hidden eggs.

Sometimes, these markers are sneakily tucked away, hidden within the folds of leaves, or nestled in the crooks of stems, so you can check well to know where you are targeting. Gently inspect the nooks and crannies of your tomato plants.

– Invite Predators

By attracting beneficial predators to your garden, you can create a balanced ecosystem that helps control tomato worm population. Some of the common predators include parasitic wasps, braconid wasps, lacewings, and birds so that they would quickly adapt to your land and eat these pests away.

You can try incorporating a variety of plants that attract beneficial insects, provide water sources, and minimize pesticide use — this way, you create an environment that welcomes these natural predators to your garden. They will contribute to the natural balance by keeping black tomato worm populations in check, reducing the need for chemical interventions.

– Manage Your Land

Regularly plow your soil in the fall and winter to expose fruit worms and cutworms that overwinter in the soil. This helps disrupt their hiding places and makes them more vulnerable to predators.

Remove any debris, such as dried leaves and weeds, from the soil after the growing season. Avoid composting this material, as it may contain black worm eggs because they can be organic matter that won’t decompose and invite the caterpillars. You must try clearing away debris eliminates potential hiding spots for pests.

Tilling the soil will disturb the caterpillars and promote air circulation. This helps expose them to predators like birds, which feed on the uncovered larvae. If you have chickens, allow them access to the tilled soil. Chickens are natural foragers and will eagerly consume the exposed larvae, contributing to pest control in your garden.

Diatomaceous earth can also be used, as its dust works by physically damaging the outer shell of insects, causing them to dehydrate and die. It is important to note that this method can also harm other insects, so use it selectively and avoid applying it directly on flowers where pollinators may land.Handpicking Visible Caterpillars

– A Homemade Pesticide

For a DIY organic pesticide, there are several things you can try, as the juice can be made by soaking cigarette butts in water for several days. Strain the solution and pour it around the plants. The strong scent deters insects.

On the other hand, you can also make some garlic solution can be made by crushing garlic bulbs and soaking them in water for twelve hours. Add half a cup of vegetable oil, some ground pepper, and one teaspoon of insecticidal soap.

Mix well and spray it on your plants. You can also mix a tablespoon of vinegar with two liters of water. Vinegar’s acidic nature repels insects. Use it as a spray on your tomato plants.

These homemade remedies are natural, cost-effective, and can help protect your tomatoes from pests. Alternatively, you can use more harsh chemical pesticides containing Bacillus thuringiensis for the strongest effect, but avoid them if the infestation is manageable otherwise!


Dealing with black caterpillars on tomato plants can be a daunting task, but it’s not impossible to eliminate them, and here’s a recap of what we covered:

  • Your likely culprits will be hornworms, armyworms, or tomato fruitworms. Irrelevant to the species, they all deal significant damage.
  • Handpicking visible caterpillars and eggs, and using homemade organic pesticides like tobacco juice, garlic solution, and vinegar spray, can go a long way in controlling the infestation.
  • Inviting worm predators such as parasitic wasps, braconid wasps, lacewings, and birds to your garden creates a balanced ecosystem that helps keep the worm population in check.
  • Managing your land by plowing the soil, clearing debris, and promoting air circulation also aids in reducing their presence.

You must now stay diligent, and soon your tomato plants will be free from the clutches of those unwelcome guests, by understanding the different types of worms and their behaviors, you can take effective measures to combat them.

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