15 Common Tomato Diseases: Solutions to Identify and Manage Them Early


Every gardener dreams of growing lush, fragrant tomatoes. Like all plants, however, tomatoes are prone to various diseases that, if not managed early, can compromise their health and your harvest. Here we explore the 15 most common tomato diseases and provide solutions to keep your plants thriving.

Key Tomato Diseases and Their Remedies:

  1. Fruit Cracking
    • Symptoms: Cracks and grooves on tomatoes.
    • Solution: This often occurs due to inconsistent watering after dry periods. Maintain regular and even watering to prevent cracking.
  2. Green Collar
    • Symptoms: Green color around the stem, with the rest of the fruit red.
    • Solution: Caused by nutrient deficiencies and high temperatures. Shade plants and ensure they receive balanced nutrients.
  3. Tomato Blight
    • Symptoms: Yellow, watery spots on fruits becoming inedible.
    • Solution: Protect plants from strong sunlight and avoid cutting through the leaves.
  4. Rolled Leaves
    • Symptoms: Leaves twist and curl.
    • Solution: Excessive sunlight can cause this. Shade the plants to prevent curling.
  5. Blossom End Rot
    • Symptoms: Rotting at the tips of unripe tomatoes.
    • Solution: Typically a calcium deficiency. Ensure balanced nutrient supply.
  6. Bacterial Canker
    • Symptoms: Wilting leaves with brown stripes on the stem.
    • Solution: Use bactericides, remove infected plants, and rotate crops to prevent recurrence.
  7. Stolbur Disease
    • Symptoms: Shortened stems, stunted and discolored leaves.
    • Solution: Caused by insect-transmitted bacteria. Use insecticides and remove affected plants.
  8. Septoria Leaf Spot
    • Symptoms: Brown leaf spots with black centers.
    • Solution: Fungicidal sprays can prevent and control this fungal disease.
  9. Fusarium Wilt
    • Symptoms: Browning of vascular tissues and wilting.
    • Solution: Use disease-resistant varieties and avoid planting in infected soil.
  10. Potato Blight
    • Symptoms: Browning of leaves, stems, and fruits.
    • Solution: Employ preventive measures like fungicidal sprays.
  11. Gray Mold
    • Symptoms: Gray rot on plants and fruits.
    • Solution: Apply fungicides promptly, ensure proper watering and lighting.
  12. Powdery Mildew
    • Symptoms: Powdery white spots on fruits.
    • Solution: Fungicides are effective; focus on preventative care.
  13. Tomato Bronzing Virus
    • Symptoms: Bronze-colored spots on leaves, necrotic spots on fruits.
    • Solution: Use insecticides and sterilize greenhouse and tools.
  14. Tomato Mosaic Virus
    • Symptoms: Marbled fruits, irregular ripening.
    • Solution: Remove infected plants, disinfect tools and soil.
  15. Leaf Miner
    • Symptoms: Visible white tracks on leaves and fruits.
    • Solution: Apply specialized sprays, sanitize greenhouse and tools, and consider soil freezing for prevention.

Managing these diseases effectively requires early detection and appropriate responses. With these strategies, you can help ensure a healthy and productive tomato garden.