Disease on crop
physiologicalSunscald on apple
Physiological disorder
Damage from direct intense sun exposure on fruit or bark, particularly on plants suddenly exposed by pruning, defoliation, or hot weather. Distinct from sunburn (which is reversible).
- Disease
- Sunscald
- Pathogen type
- Physiological
- Crop
- Apple
- Scientific name
- Physiological disorder
Sunscald on apple
Detailed guidance for this section is being prepared. Check back soon.
Symptoms on apple
- ▸ Pale tan to white papery patch on sun-exposed fruit (tomato, pepper, apple)
- ▸ Cracked white patches on south or southwest-facing trunk bark of young trees
- ▸ Affected fruit tissue collapses and often becomes a secondary-rot entry point
IPM controls
- ✓ Maintain healthy foliage cover over fruit (avoid heavy late-summer defoliation that exposes fruit)
- ✓ Whitewash trunks of young fruit trees with diluted latex paint to reduce winter sunscald
- ✓ Site west-facing tomato rows to get morning sun without afternoon sun stress
- ✓ Shade cloth (30-50%) over peppers and tomatoes during heat waves above 95°F
Other crops affected by sunscald
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