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Botrytis Blight in Bilberry

How to identify and treat botrytis blight in Bilberry.

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Bilberry care requirements

water
Keep soil consistently moist; bilberries prefer cool, wet conditions; provide regular moisture without waterlogging
soil
Very acidic soil (pH 4.0–5.0) is essential; high in organic matter; peat-based or pine-rich substrates ideal
light
Partial shade to dappled sunlight (3–6 hours); tolerates shade better than highbush varieties; full sun in cooler climates
symptoms

Symptoms to look for in Bilberry

  • fiber_manual_recordFuzzy grey-brown mould on flowers, leaves, or stems
  • fiber_manual_recordWater-soaked spots that turn brown and mushy
  • fiber_manual_recordBlighted flower buds that fail to open
help

Common causes in Bilberry

Caused by the fungus Botrytis cinerea (grey mould), which thrives in cool, humid conditions with poor air circulation, often spreading rapidly on damaged or ageing plant tissue.

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How to treat botrytis blight in Bilberry

Remove and destroy all affected plant material immediately, improve airflow around the plant, and apply a fungicide labelled for Botrytis if the infection is spreading.

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Preventing botrytis blight in Bilberry

Avoid overhead watering and overcrowding, water at soil level, deadhead spent flowers promptly, and ensure good ventilation, especially in humid weather.

Botrytis Blight in Bilberry — Symptoms & Treatment | GreenScout