| Sclerotinia rot | |
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| The typical white mould visible on a carrot infected with sclerotinia rot (Sclerotinia sclerotiorum) | |
| Scientific Classification | |
| Kingdom: | Fungi |
| Phylum: | Ascomycota |
| Class: | Leotiomycetes |
| Subclass: | Leotiomycetidae |
| Order: | Helotiales |
| Family: | Sclerotiniaceae |
| Genus: | Sclerotinia |
| Species: | Sclerotinia sclerotiorum |
| Synonyms | |
| Blossom blight Cottony rot |
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Sclerotinia rot (Sclerotinia spp.), also known as Blossom blight, Cottony rot, Crown rot, Drop, Pink rot, Water soft rot, White mold. And is very similar to Onion white rot or Mouldy nose (Sclerotium cepivorum) in alliums.[1]
Symptoms[]
Symptoms can depend on the plant infected and the mechanism of infection. Common symptoms include water-soaked spots on fruits, stems, or leaves, petioles with altered morphology. The watery spots enlarge and develop a cottony white mass that converts the plant to a slimy, wet mass that produces abundant sclerotia. Symptoms appear like Pythium, but occur in dry weather.
In some plants, the symptoms are described as dry. The plant develops brown lesions that coalesce and circle the plant. Everything above the lesion wilts and dies.
Alliums[]
The first visible symptom is the wilting and yellowing of the foliage, most likely during dry weather. If the weather is wetter the foliage may not wilt, but the plant will become loose in the soil. Under the soil a white, fluffy fungus grows on the base of and invades the bulb. Later this mould becomes covered in small, round, black structures.[2]
Treatment[]
If attacks are seen in the garden, water healthy plants with Cheshunt Compound after removing diseased plants immediately.
There are some fungi that are parasitic on Sclerotinia and that can be used to control it. The most effective of these is Coniothyrium minitans, but none have been turned into a practical treatment.
Chemical control can include soil fumigation, which is considered an effective control method. Some fungicides, including benomyl, are effective in some crops, but not all.
Prevention[]
Good cultural practices are necessary to avoid attacks such as taking care to avoid planting susceptible crops in poorly drained soils, low planting densities and weeding between crop rows. Infected fields should be planted with non-susceptible crops, such as cereals for at least three years.
Hosts[]
Potential hosts of sclerotinia rot include:
Examples[]
References[]
- ↑ "Sclerotinia rot :essential data". Retrieved 2010-07-17.
- ↑ (2010). "Onion white rot". Royal Horticultural Society. Retrieved 2010-07-17.
| Aubergine troubles |
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|---|---|
| Adverse conditions | |
| Diseases | Anthracnose · Black dot · Phomopsis blight · Phytophthora blight · Southern bacterial wilt · Southern blight |
| Pests | Aphid · Flea beetle · Greenhouse Whitefly · Pepper weevil · Red spider mite · Southern corn rootworm · Thrips |
| Brassica troubles |
|
|---|---|
| Broccoli · Brussels sprout · Cabbage · Cauliflower · Kale · Kohl rabi · Radish · Swede · Turnip | |
| Adverse conditions | Blown sprouts · Bolting · Boron deficiency · Button cauliflower · Calcium deficiency · Heartless cabbage · Magnesium deficiency · Manganese deficiency · Molybdenum deficiency · Nitrogen deficiency · Split heart |
| Diseases | Anthracnose · Bacterial soft rot · Black leaf spot · Black rot · Brassica dark leaf spot · Club root · Downey mildew · Grey leaf spot (Brassica) · Turnip mosaic virus · Sclerotinia rot · White leaf spot · White leaf spot (Brassica) · White rust · Wire stem |
| Pests | Aphid · Cabbage aphid · Cabbage Moth · Cabbage root fly · Cabbage Whitefly · Cutworm · Diamondback moth · Flea beetle · Large White · Pigeon · Silver Y moth · Slug · Small White · Swede midge · Thrips |