Apple Scab
Venturia inaequalis
fungal disease.
The most widespread apple disease in humid regions. Reduces fruit quality and defoliates trees.
Biology and conditions
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Symptoms
- Olive-green to brown spots on leaves
- Scabby corky lesions on fruit
- Premature defoliation
Controls
- Plant resistant varieties
- Sanitation of fallen leaves (mowing, leaf vacuuming)
- Fungicide program from green tip through summer
- Improve airflow through pruning
Resistant varieties
- Liberty
- Enterprise
- Williams Pride
- Goldrush
- Pristine