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Pest & Disease Library

Anthracnose: How to Identify, Treat & Control It

Anthracnose (Colletotrichum spp.) causes sunken, dark-ringed lesions and fruit rots across peppers, tomatoes, eggplant, potatoes and fruit crops; warm, wet weather drives spread and it carries over on debris and seed.

Common crops affected

What is it?

Anthracnose is caused mainly by Colletotrichum fungi. The pathogen overwinters in plant debris and infected tissue and spreads in warm, wet conditions via splashing water. It infects leaves, stems, and especially fruit, where it produces the characteristic dark, sunken spots.

How to identify it

  • Sunken circular lesions with concentric rings
  • Salmon-coloured spore masses in humidity
  • Rot on green and ripe fruit
  • Carryover on debris and volunteers

Damage and how it spreads

Anthracnose downgrades and rots fruit (a major cause of post-harvest loss), defoliates plants, and weakens stems. Because spores spread by splashing water and survive in debris, it returns season after season if not managed. Early protection is the key to clean fruit.

How to control it

  1. Remove and destroy infected debris and fruit; do not compost them.
  2. Improve airflow and avoid overhead watering to keep foliage dry.
  3. Rotate crops and use clean seed and resistant varieties where available.
  4. Apply a protective natural fungicide at first sign and during warm, wet spells.

Recommended Vegalab solution: Spore Control

Vegalab Spore ControlSpore Control preventatively from early fruiting through warm, wet periods; combine with clean seed, debris removal and rotation.

Results you can mention: Spore Control is documented against anthracnose on eggplant, peppers (chili and sweet), potatoes and tomatoes.

RoleProductUse
Primary controlSpore ControlBroad-spectrum protective fungicide
Companion / broader pressureArmour BoostSilica for tissue resilience

See crop-specific solutions

Preventing it next season

Sanitize debris, rotate crops, keep foliage dry, and start protective sprays before warm wet weather. Strong, well-nourished plants resist infection better — support cell-wall strength with Armour Boost and balanced nutrition.

Not sure this is what's affecting your crop? Ask an agronomist about your crop →

Claims and product availability vary by jurisdiction. Always read and follow the product label.

Frequently asked questions

How do I stop it returning yearly?

Clean seed, remove infected debris, and rotate away from susceptible hosts alongside preventative Spore Control.

What does anthracnose look like on fruit?

Dark, sunken, often circular spots, sometimes with concentric rings or pinkish spore masses in the center.

Can I save fruit that is already infected?

No — remove and destroy infected fruit and protect the rest of the crop to stop spread.

Is Spore Control safe for edibles?

It is a naturally derived, low-residue input. Follow the label and confirm regional approvals.

Crops we cover for this problem