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Botrytis Blight in Blueberry

How to identify and treat botrytis blight in Blueberry.

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Blueberry care requirements

water
Regularly; keep moist. Use rainwater or acidic water.
soil
Very acidic (pH 4.5–5.5), peaty, well-draining.
light
Full sun to light shade.
symptoms

Symptoms to look for in Blueberry

Fuzzy grey-brown mould on flowers and developing fruit, causing blossoms to brown and fail to set fruit, or berries to rot on the bush.

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Common causes in Blueberry

Botrytis cinerea thrives in the cool, damp spring conditions during blueberry flowering, and the dense, twiggy growth habit of blueberry bushes can trap humidity if not pruned.

healing

How to treat botrytis blight in Blueberry

Remove and destroy affected flowers, fruit, and any mummified berries left on the bush, and improve airflow by pruning out crowded interior growth.

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Preventing botrytis blight in Blueberry

Prune annually to open up the centre of the bush for airflow, and avoid overhead watering, especially during flowering.