Grey mould

Impacting wide range of plant species worldwide, Botrytis cinerea can affect flowers, stems, leaves and fruit – including post-harvest.

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  • Mostly airborne spores of Botrytis cinerea that cause the infection
  • An opportunistic disease, Botrytis can readily exploit natural openings or plant wounds – for example, flowers or wounds causes by pruning /deleafing
  • Fungal spores enter plant through a wound or senescent tissue
  • Spreads rapidly in humid, cloudy conditions, and at temperatures below 20°C
  • Can cause post-harvest damage – grey mould can develop at refrigerator temperatures

Damage caused

  • Typical symptoms are lesions covered by grey sporulation
  • Berries - most damage observed post-harvest
  • Tomatoes - grey mould mainly affects stems and leaves but can damage fruit
  • Ornamentals - symptoms observed on flowers, leaves and stems


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