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Botrytis Blight in Raspberry

How to identify and treat botrytis blight in Raspberry.

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Raspberry care requirements

water
Regularly, especially in dry spells and when fruiting.
soil
Slightly acidic, fertile, moisture-retentive but well-draining.
light
Full sun to partial shade.
symptoms

Symptoms to look for in Raspberry

  • 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
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Common causes in Raspberry

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 Raspberry

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 Raspberry

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

Botrytis Blight in Raspberry — Symptoms & Treatment | GreenScout