Planning reference

Tomato Anthracnose vs Sunscald

Separate sunken dark ripe-fruit rot from pale sun-facing tomato injury before spraying, pruning, composting fruit, saving seed, or leaving affected tomatoes on the plant.

Problem diagnostic

Tomato Anthracnose vs Sunscald cockpit

Start with fruit ripeness, lesion color, sun-facing side, canopy cover, splash history, wet weather, spores, and removal timing before pruning or spraying.

Sunken ripe-fruit rot and pale sun-facing injury need different harvest and pruning decisions.
  1. 1 Anthracnose clues Small circular sunken ripe-fruit spots, dark centers, wet weather, and salmon spores.
  2. 2 Sunscald clues Pale sun-facing patches, papery tissue, leaf loss, and over-pruning exposure.
  3. 3 Fruit proof Check ripeness, lesion color, sun side, canopy cover, splash, and removal timing.
Fruit surface
Sunken/paleripe sunken rot versus sun-facing papery injury
Canopy
Leaf coverleaf loss and over-pruning expose tomato fruit
Spread cue
Splashwet weather and splash raise anthracnose pressure

What each tomato fruit signal means

Tomato anthracnose
Tomato anthracnose is a fungal ripe-rot disease that usually becomes visible on ripe or overripe tomatoes as small, circular, sunken fruit spots that darken and can decay quickly in warm wet or humid weather.
Sunscald
Sunscald is environmental fruit injury where exposed tomato fruit receives direct intense sun after leaf loss, over-pruning, disease, or insect feeding removes protective foliage.
Circular sunken dark spots on ripe fruit
Small round water-soaked spots on ripe tomatoes, dark centers, deeper sunken tissue, concentric rings, salmon-pink spores in humid weather, or multiple lesions merging into rot point toward anthracnose.
Pale sun-facing patches after foliage loss
Pale yellow, white, gray-white, flattened, blistered, papery, or leathery patches on the side facing direct sun point toward sunscald, especially after defoliation or over-pruning.
Ripeness, leaf cover, and fruit removal timing
Anthracnose prevention depends on harvest timing, dry foliage, splash reduction, residue cleanup, and avoiding overripe fruit; sunscald prevention depends on healthy foliage cover and removing injured fruit before secondary decay spreads.

Tomato fruit spot workflow

Check fruit spots before spraying or pruning
Do not treat every spotted, sunken, pale, or rotting tomato fruit the same way; check ripeness, sun exposure, leaf cover, lesion shape, dark centers, water-soaked tissue, salmon-pink spores, wet weather, soil splash, harvest timing, and secondary decay before spraying, pruning, composting fruit, saving seed, or leaving affected tomatoes on the plant.
Start with position and color
Anthracnose usually starts as circular depressed spots that darken on ripening fruit; sunscald usually starts as light-colored injury on the side of fruit exposed to full sun.
Protect foliage without crowding plants
Keep enough leaf cover to shade fruit, but still manage spacing, staking, pruning, and disease pressure so dense wet foliage does not increase fungal spread.
Reduce splash and overripe fruit exposure
Harvest ripe tomatoes promptly, remove rotting fruit, mulch against soil splash, water at the base, and clean infected residue so anthracnose does not build in debris, soil, or seed-linked material.
Remove fruit that will not recover
Sunscald and anthracnose spots do not heal normally. Remove badly affected tomatoes before secondary fungi, bacteria, insects, or overripe fruit decay create the next problem.

Use these paths

Source basis