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What are the diseases that affect tomatoes?

Author

Eleanor Gray

Published Mar 11, 2026

What are the diseases that affect tomatoes?

Watch Out for These 10 Tomato Plant Diseases in Your Garden This Summer
  • Septoria Leaf Spot.
  • Anthracnose.
  • Fusarium and Verticillium Wilt.
  • Early Blight (Alternaria)
  • Late Blight.
  • Mosaic Virus.
  • Blossom Drop.
  • Blossom-End Rot.

Also, what do tomato diseases look like?

Symptoms in tomato plants are the upward curling of leaves, yellow (chlorotic) leaf margins, smaller leaves than normal, plant stunting, and flower drop. If tomato plants are infected early in their growth, there may be no fruit formed. Infected plants may appear randomly throughout the garden.

Similarly, what pests and diseases affect tomatoes? Pests & Diseases affecting tomatoes

  • Tomato Viruses | Mosaic, Leaf curl.
  • Moulds, mildews on tomatoes.
  • Tomato Blights, Leaf Spots & Specks.
  • Blossom-end Rot.
  • Fruit Fly (Garden Enemy No.
  • Budworm.
  • Whitefly and aphids on tomatoes.
  • Tomato Mites.

Besides, what virus affects tomatoes?

The most common tomato viruses are: Tobacco mosaic virus (TMV) Tomato mosaic virus (ToMV) Tomato spotted wilt virus (TSWV)

How do you treat fungal tomatoes?

To create a solution that prevents and treats disease, add a heaping tablespoon of baking soda, a teaspoon of vegetable oil, and a small amount of mild soap to a gallon of water and spray the tomato plants with this solution. This needs to be reapplied regularly to maintain its efficiency.

What are the signs of over watering tomato plants?

Early signs of overwatering in tomato plants include cracked fruit and blisters or bumps on the lower leaves. If the overwatering continues, the bumps or blisters on the leaves turn corky. Meanwhile, the roots begin to drown, die and rot, which reduces the amount of water the green part of the plant receives.

What is killing my tomatoes?

While disease is a common reason for tomato plants dying, disease isn't the only thing that can kill tomato plants. Environmental issues, such as a lack of water, too much water, poor soil and too little light can also cause tomato plants to fail and die. Light issues – A lack of sun also can affect a tomato plant.

How are tomato problems diagnosed?

For example, a healthy tomato plant has softly fuzzed, medium-green leaves. If the leaves of your plant have brown or black patches, holes, chewed edges or fuzzy mold growing on them, make a note of that before perusing the list of problems.

What is bacterial wilt of tomato?

Southern bacterial wilt of tomato is caused by the soil-borne bacterium Ralstonia solanacearum (formerly known as Pseudomonas solanacearum). It is a widespread and potentially devastating disease that affects solanaceous crops and a wide range of ornamentals in the tropical and subtropical regions of the world.

What would cause tomato plants to wilt?

Possible causes include lack of water, fungal wilt diseases, tomato spotted wilt virus, walnut toxicity and stalk borers. Lack of Water. Plants may wilt badly when soils are dry, but will revive rapidly when they are watered. A thorough watering once a week during hot, dry weather should be sufficient.

What are 5 diseases caused by bacteria in plants?

bacterial
  • aster yellows.
  • bacterial wilt.
  • blight. fire blight. rice bacterial blight.
  • canker.
  • crown gall.
  • rot. basal rot.
  • scab.

How do you prevent tomato diseases?

Health and Hygiene
  1. Minimize Irrigation. Tomato plants have surprisingly low water needs and overwatering can promote disease.
  2. Water at Ground Level.
  3. Water in the Morning.
  4. Mulch.
  5. Remove Infected Leaves Immediately.
  6. Prune Out Dense Foliage.
  7. Keep Adjacent Vegetation Down.
  8. Disinfect Tomato Tools.

What are 5 diseases caused by bacteria?

Most Deadly Bacterial Infections
  • Tuberculosis.
  • Anthrax.
  • Tetanus.
  • Leptospirosis.
  • Pneumonia.
  • Cholera.
  • Botulism.
  • Pseudomonas Infection.

What is attacking my tomato plants?

Viral Diseases. What they look like: Viral diseases mainly attack the tomatoes themselves. You might find black spots on tomatoes or weird stripes on them. Good soil management and using organic fertilizer for tomatoes also helps keep your plants healthy, which can help them naturally resist viruses better.

What eats tomatoes at night?

Nocturnal feeders with a fondness for tomato plants include skunks, rats, raccoons, and deer. Skunks do the least damage, taking a bite from a single low-hanging fruit. Raccoons and rats will feed more on the lower fruits.

What to spray on tomatoes for bugs?

To make an insect spray at home for tomato plans, mix 10 ounces of hydrogen peroxide, 1 gallon of water and 10 ounces of sugar together. Mix it well and spray it on and around the tomato plant and leaves.

What is a natural pesticide for tomatoes?

Mix 1 cup of cornmeal with 5 gallons of water, strain, and then spray on tomato plants. For warding off early blight, mix 2 tablespoons each of cooking oil, organic baby shampoo and baking soda with 1 gallon of water, and then spray both sides of the leaves for best prevention.

What does tomato fungus look like?

Late blight is caused by a fungus, and it creates irregularly shaped splotches that are slimy and water-soaked. Often, the splotches occur on the top-most leaves and stems first. Eventually, entire stems “rot†on the vine, turning black and slimy. There may also be patches of white spores on the leaf undersides.

What does baking soda do for tomato plants?

Sprinkle over plants. It is believed that a sprinkle of bicarb soda on the soil around tomato plants will sweeten tomatoes. Bicarb soda helps lower the acid levels in soil, which makes tomatoes sweeter. Before you plant your garden, scoop some soil into a small container and wet it with some water.

What is the best fungicide for tomatoes?

10 Best Fungicides For Tomatoes – Reviews
  1. Bonide Mancozeb Fungicide Concentrate.
  2. Southern Ag Liquid Copper Fungicide.
  3. Bonide Copper Fungicide RTU.
  4. Garden Safe Fungicide Ready-To-Use.
  5. Spectracide Immunox Fungicide Spray Concentrate.
  6. Neem Bliss Neem Oil Fungicide.
  7. Daconil Fungicide Concentrate.
  8. Serenade Garden Fungicide.

How do you get rid of tomato fungus naturally?

Baking soda has fungicidal properties that can stop or reduce the spread of early and late tomato blight. Baking soda sprays typically contain about 1 teaspoon baking soda dissolved into 1 quart of warm water. Adding a drop of liquid dish soap or 2 1/2 tablespoons vegetable oil helps the solution stick to your plant.

How do you treat tomato viruses?

Soak seeds in a 10% solution of trisodium phosphate (Na3PO4) for at least 15 minutes. Heat dry seeds to 158 °F and hold them at that temperature for two to four days. Hot water treatment is not adequate for some tomato viruses.

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What are the diseases that affect tomatoes?