Garden Care

Tiny Black Bugs On Tomato Plants – How To Prevent Them

Tomato plants, cherished for their vibrant fruits and versatile culinary uses, are a staple in gardens worldwide.

However, the joy of cultivating these plants can be dampened when you see tiny black bugs on tomato plants.

These minuscule pests are often unnoticed until they multiply and wreak havoc on tomato plants. Understanding their impact on the plants is essential for maintaining a healthy and thriving tomato garden.

This article will provide some practices to protect our beloved plants from unwelcome intrusion.

What Are Tiny Black Bugs On Tomato Plants?

tiny black bugs on tomato plants

Tiny black bugs tomato plants are often aphids or flea beetles. Aphids are small, soft-bodied insects that feed on plant sap, while flea beetles are small, jumping insects that damage plant leaves.

These pests can weaken plants and reduce yields.


Small black bugs tomato plants can be several different types of insects. One common pest that fits this description is the aphid.

These soft-bodied insects come in various colors, including black. They are usually found on the undersides of leaves and the stems of plants.

These insects reproduce quickly, and a few aphids can rapidly multiply into a large infestation, damaging tomato plants by weakening them and transmitting plant diseases.

Aphids use their needle-like mouthparts to pierce plant tissues and feed on the sap. As they deplete the plant of vital nutrients, the growth of the tomato plant can be stunted.

This is particularly harmful to young plants and can affect their overall development.

Their feeding can render the leaves and new shoots of the tomato plant distorted and curled. This deformity hampers the plant’s ability to carry out photosynthesis effectively.

Prolonged aphid infestations weaken the overall resistance of tomato plants, making them more susceptible to other pests and diseases.

Thus, it can reduce yields as the plant diverts resources to fight off the infestation rather than produce healthy fruits.

Flea Beetles 

Another potential culprit could be flea beetles. Flea beetles are tiny, shiny brown or black insects that jump like fleas when disturbed.

This black bug on tomato plants feeds on the leaves, creating tiny holes that give the leaves a characteristic “shot-hole” appearance.

While individual holes might seem minor, severe infestations can lead to extensive damage, causing leaves to turn brown and die prematurely.

When leaves are riddled with black spots, the plant has less surface area to absorb sunlight and produce energy, ending up with weakened plants.

Young or newly transplanted tomato plants are particularly vulnerable to flea beetle damage.

The feeding activity of these pests can stunt the growth of young plants, affecting their overall development and delaying fruit production.

While flea beetles primarily target leaves, in severe infestations, they might also feed on young fruits. Damage to developing tomatoes can result in deformities or render the fruits unmarketable.

Continuous feeding by flea beetles takes a toll on the tomato plant’s natural defenses, making it prone to other pests and diseases. Weakened plants are more likely to succumb to various environmental stresses.

Although flea beetles are not as notorious as some other insects for transmitting diseases, in some cases, they can carry and spread plant pathogens.

If a tomato plant is already stressed due to flea beetle damage, it’s more likely to fall victim to diseases that these pests might introduce.

Solutions For Little Black Bugs On Tomato Plants

Solutions For Little Black Bugs On Tomato Plants

Get Rid Of Aphids

What to do with black bugs on my tomato plants? Getting rid of aphids can be challenging, but it’s possible with a combination of natural methods and, in severe cases, organic insecticides.

Here’s a step-by-step guide to help you control and eliminate aphids from your plants:

  • Pruning and Removal: Start off with severely infested parts. Remove the most affected leaves and stems, disposing of them far from your garden. This reduces the aphid population and prevents them from spreading.
  • Water Spray: Use a strong stream of water to remove small black bugs on tomato plants. Regularly spraying your plants with a hose can keep aphid numbers under control. Make sure to spray the undersides of leaves where aphids often hide.
  • Insecticidal Soap: Insecticidal soaps are effective against aphids and are safe for most plants and beneficial insects.

You can buy insecticidal soapy water from a garden center or make your own by mixing liquid soap with water. Spray it directly onto the aphids, ensuring good coverage.

  • Neem Oil: Neem oil is a natural insecticide derived from the neem tree. It disrupts the aphids’ hormonal balance and acts as a feeding deterrent.

Mix neem oil with water and a few drops of dish soap (to help it stick) and spray it on the affected plants. Be sure to follow the instructions on the neem oil product.

  • Garlic or Pepper Spray: The strong smell of garlic and peppers can repel aphids. You can make a natural spray by blending garlic or hot peppers with water, straining the mixture, and spraying it on your plants.
  • Diatomaceous Earth: Diatomaceous earth is a fine powder made from the fossilized remains of aquatic organisms. It is harmless to humans and animals but lethal to insects with exoskeletons, including aphids.

Dust the affected plants with diatomaceous earth, focusing on the areas where aphids are present.

Get Rid Of Flea Beetles 

Flea beetles are also stubborn insects, but there are several methods you can employ to get rid of them and protect your plants. Here are some effective strategies:

  • Neem oil: Similar to aphids, this method can disrupt their feeding and reproductive cycles. Spray the mixture of neem oil, water, and dish soap on your plants. Apply it in the early morning or late evening when beneficial insects are inactive.
  • Crop rotation: Rotate your crops annually to disrupt the life cycle of black beetles. Avoid planting susceptible plants in the same location year after year.
  • Mulching: Mulching with materials like straw or wood chips can create a barrier between flea beetles in the soil and your plants. Mulch also helps retain soil moisture and provides a healthier environment for plants.
  • Early planting: Plant your crops early when the weather is cooler. Flea beetle populations often peak in late spring and early summer, so getting your plants established before this period can reduce the impact of infestation.
  • Garlic or pepper spray: This method is similar to when you do with aphids. Create a spray by blending garlic or hot peppers with water, straining the mixture, and applying it to your plants.

How To Prevent Black Bugs On Tomato Plants 

How To Prevent Black Bugs On Tomato Plants 

Companion Plants

Companion planting involves strategically placing certain plants near each other to enhance growth or provide pest protection.

When it comes to preventing black bugs on tomatoes, here are some companion planting options you can use:

  • Marigolds: Marigolds are well-known for repelling nematodes and certain insects, including aphids. Planting marigolds around your tomato plants can deter aphids and other pests from infesting your tomatoes.
  • Nasturtiums: Nasturtiums are excellent companions for tomatoes as they can shoo away aphids, whiteflies, and squash bugs. The peppery scent of nasturtiums acts as a natural deterrent.
  • Basil: Basil has a natural pest-repellent property and is effective against flies and mosquitoes. Planting basil near your tomatoes can help keep aphids and other insects away.
  • Calendula: These flowers attract hoverflies, beneficial insects that feed on aphids. Having hoverflies in your garden can naturally control aphid populations.
  • Chives: This herb chases aphids away and deter many other insects due to their strong odor. Plant chives near your tomatoes to provide them with natural protection.
  • Garlic: Garlic is a natural insect repellent and can help keep harmful insects away from your tomato plants. Plant garlic bulbs around the base of your tomato plants, or make a garlic spray to deter pests.
  • Dill: Dill attracts beneficial insects like ladybugs and lacewings, natural predators of aphids.

Covering Or Netting The Rows

Covering your tomato plants with row covers or netting creates a physical barrier that prevents black bugs from directly accessing the plants.

Moreover, this method allows you to protect the plants from chipmunks.

These barriers are usually lightweight materials that allow sunlight, air, and moisture to reach the plants while keeping pests out.

Row covers act as a shield, preventing flying insects like aphids from landing on the plants and laying eggs.

The number of flea beetles, known for their jumping ability, will be better controlled. By excluding these insects, you significantly reduce the risk of infestation.

Row covers can be designed with different levels of mesh. Fine mesh allows pollinators like bees to enter while keeping out larger pests.

This ensures that beneficial insects can access the plants while harmful invaders are excluded.

Regular Monitoring

Regularly monitoring your tomato plants is one of the most effective strategies to manage black bugs.

Frequent checking allows you to spot black bugs at the earliest stages of infestation.

When you catch the problem early, you can immediately act before the population multiplies and causes significant damage.

Early control methods are insecticidal soap, neem oil, introducing natural predators, a few to name.

Early detection often means you can address the problem with less toxic methods, reducing the need for chemical pesticides.

Timely action can also prevent the infestation from spreading to other plants in your garden.

Predatory Insects

Predatory insects, such as ladybugs, lacewings, predatory beetles, and syrphid flies, feed on black bugs like aphids.

They actively hunt for aphids and consume them, keeping their populations in check. This natural predation helps reduce the number of black bugs on tomato plants.

Predatory insects can provide continuous control of black bugs.

Unlike chemical pesticides that have limited effectiveness and can harm beneficial insects, predators actively seek out and consume pests as long as a food source is available.

They can help maintain a balanced ecosystem in your garden and preserve the overall health of the garden ecosystem.


black bug on tomato plants

What Are The Black Poop Dots On My Tomato Plant?

The black poop dots you notice on your tomato plant are likely a sign of aphids or other sap-sucking insects.

As they feed, they excrete a sticky substance called honeydew, which appears as shiny, sticky droplets on leaves and surfaces below the infested plants.

Over time, the honeydew can turn black due to the growth of a fungus called sooty mold.

Sooty mold doesn’t directly harm the plant but can block sunlight from reaching the leaves. This can weaken the plant and affect its overall health and growth.

What Do Aphids Look Like On A Plant?

Aphids are small, soft-bodied insects in various colors, including green, black, brown, yellow, and even pink. Their appearance can vary based on their species and life stage.

Aphids have pear-shaped bodies with soft, slender, and somewhat transparent abdomens.

They have a distinct abdomen, thorax, and head, although these body segments can appear fused together, especially in wingless aphids.


Tiny black bugs on tomato plants can pose significant challenges to gardeners. Yet, these issues can be effectively managed with knowledge and proactive measures.

Identifying these pests early through regular monitoring is the first step toward prevention.

Ensuring the overall health of tomato plants through proper watering, nutrient management, and good gardening practices enhances their natural resistance against pests.

Remember, a well-informed and attentive approach is the key to maintaining the health and productivity of tomato plants in the face of these challenges.

Samuel Mark

Hello I am Samuel. Samuel's Garden is a garden blog where I share my experiences in garden caring and tree growth. Hope you enjoy it!

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