| Black stalk rot: Stemphylium botryosum |
Symptom:
- Affects garlic and leek
- Attacks only diseased, injured bulbs and aging tissue
- Damage by weakening the seed stalks when they are almost ripe causing them to break over
- Spoil the appearance of the bulb with a sooty mould before they are marketed
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Stalk rot |
Sooty mould |
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Identification of pathogen:
- Producing short clavate to cylindrical asci in brown pseudothecia
- Ascospores yellow to yellowish brown, oval to ellipsoid, 26-50 x 10-20 um with 1-5 vertical and 7 transverse septa
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Management:
- Harvest without causing any bruises
- Bulbs should be dried properly before storage
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Source of Images:
http://www.agri.hro.or.jp/dounan/byoutyu/ronbunn/photo/dot.jpg
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