Bulb and Corm Rots | |||
Common Name |
Fireblight |
||
Scientific Name |
Fusarium, Sclerotinia, Penicillium fungi | ||
Damage Caused |
Rotting of bulb, lack of growth. | ||
Life Cycle |
Fungi enters bulb through wounds in soil. Spores spread in storage of bulbs. | ||
Control Method |
At planting and lifting time, burn afected bulbs. Soak bulbs in benomyl or thiophanatemethyl fungicide before planting.Treat bulbs with care, to minimise mechanical injury. Avoid exposure to sunlight in storage. Dig up affected areas and replace soil. |
Common Name |
Scientific Name Plants Affected |
Symptoms | |
Blue Mould Rot |
Penicillium gladiolii |
Crocus, Cyclamen, Fressian, Narcisii, Gladioli |
Irregular red brown sunken lesions develop on sides of corm and pink bodies appear on skin. Blue green mould seen. |
Gladiolus Corm Rot |
Sclerotincia draytonii |
- |
Yellowing and browning of foliage. Brown rot in corm. |
Gladiolus Corm Rot |
Fusarium oxysporus |
- |
Dark brown corms. Yellow stripping on leaves. |
Gladiolus Dry Rot |
Stromatinia gladiolii |
- |
Established rapid browning and death of leaves. Dark decay of sheaths. Sunken lesions on corms. |
Gladiolus hard rot |
- | - |
Leaves purple spots. Red black spots on corms. |
Gladiolus scab and neck rot |
- | - |
Leaves are covered in spots leaflets shrivel. |
Narcissus Basal Rot |
- | - |
Softening and browning of basal ring followed by rich brown rot through bulb. |
Tulip Grey Bulb Rot |
- |
Colchium, Crocus, Hyacinth |
Bulbs have dry rot, do not emerge. |
Carnation Rot |
Fusarium poae |
- |
Mites transport spores. Buds: brown pink mould seen. Internal rot and decay. |
Grey Mould |
- |
Chrysanthemum, Cyclamen, Dahlia, Fressia, Impatiens, Rhodedendron, Lavender, Poppy, Roses, Viburnum |
Grey mould with black sclerotia. Rotting of bulbs and stalks. |
Root and Foot Rots |
Phytophora, Pythium. |
Asparagus, Carnation, Crysanth, Delphinium, Hyacinth, Hydrenga, Lillies, Lupins, Narcisii, Primula, Viola, bedding plants. |
Roots affected. Yellowing and wilting of leaves. Flowers and fruits reduced. Roots febble and black. |
Damping Off |
Pythium and Rhizoctonia solanii |
Antirhinum, Nemesia, Petunia, Salvia, Stock, Tagates.Alyssum, / Carnation, Lobelia. |
Death in seedlings, in circular patches. Unthrifty and / shrivelled, wiry. |
Information Collated by James M. Burton as part of H.N.D. Course at Pencoed Agricultural College.
Chemical Information Correct as of 06:06:97. Always read and follow the instructions when using fungicides.