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Snowdrop Grey Mould



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Snowdrop Grey Mould

Usually appear in

Spring


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Caused By:-     The Fungus Botrytis galanthina

Description

Grey mould on snowdrops(Galanthus [Gk. gala, milk; anthos, flower]) is caused by the fungus Botrytis galanthina and is closely related to the grey mould fungus Botrytis cinerea. This fungus only attacks Galanthus spp. especially in mild damp winters.
It causes typical grey mould symptoms on the leaves and is usually seen as the leaves poke above the ground in the spring.
Infection may spread to the bulbs, which rots forming small black spores (sclerotia) on the surface of the bulbs. The leaves and flower later may distort, caused by dead patches on the leaves and flower, and collapse.
The spores falls off into the soil and can remain there for a few years.
Some varieties are more prone to attack by this fungus than others.
Picture by Department of Plant Pathology Archive, North Carolina State University, Bugwood.org.
See these other Grey Moulds and Botrytis fungi Bean Chocolate Spot, Botrytis, Grey Mould, Lettuce Grey Mould, Lily Disease, Onion Neck Rot, Peony Wilt, Rose Grey Mould, Strawberry Grey Mould.


Control

Dig up affected plants along with some soil, and destroy preferable by burning.
Before planting new bulbs inspect carefully for the black spots of the outer bulb scales.
If posssible plant new healthy snowdrops on a fresh site.
Choose snowdrop varieties that are resistant to grey mould.
If lifting and storing bulbs, dusting with sulphur dust may be helpful.
Soaking the soil with soil sterilant a few weeks before re-planting will help.



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