| Black dot | |
|---|---|
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| C. coccodes (black dot) of a tomato fruit | |
| Scientific Classification | |
| Kingdom: | Fungi |
| Phylum: | Ascomycota |
| Class: | Sordariomycetes |
| Subclass: | Incertae sedis |
| Order: | Phyllachorales |
| Family: | Phyllachoraceae |
| Genus: | Colletotrichum |
| Species: | Colletotrichum coccodes |
| Synonyms | |
| Chaetomium coccodes Wallr., (1833) Colletotrichum agaves Cavara, (1892) |
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Black dot (Colletotrichum coccodes) is a fungal blemish of potatoes and tomato roots that are often only just visible to the naked eye. It is also known as brown rot of tomato, aubergine and pepper fruit.[1] Black dot can be found on stolons, roots and stems, on tubers they can produce a light brown background, which can darken when in storage. [2] Black dot is a weak pathogen that is more prevalent from soils low in nitrogen or in warm, wet growing conditions. Warm, moist storage also promotes the blemish.
Black dot may develop a silvery sheen during storage, which can be confused with silver scurf. However, black dot tends to show much more irregularly shaped patches with less well-defined margins than silver scurf. Inspection with a hand lens (10x) will quickly differentiate the regularly spaced black dots from the bunched threads of silver scurf.[2]
References[]
- ↑ Good plant protection practice. European and Mediterranean Plant Protection Organization.
- ↑ a b (2003). Black dot. Potato Coucil. Retrieved: 2010-07-28.
| 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 |