Black dot

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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
Chaetomium coccodes Wallr., (1833)

Colletotrichum agaves Cavara, (1892)
Colletotrichum antirrhini F.C. Stewart, (1900)
Colletotrichum atramentarium (Berk. & Broome) Taubenh., (1916)
Colletotrichum azaleae Ellis & Everh., (1895)
Colletotrichum cajani Henn.
Colletotrichum camelliae Massee, (1899)
Colletotrichum commelinae Ellis & Everh., (1895)
Colletotrichum crotalariae Petch, (1917)
Colletotrichum cyclamenae Halst.
Colletotrichum dioscoreae Tehon, (1933)
Colletotrichum elasticae Zimm.
Colletotrichum foliicola (Nishida) Sawada [as 'foliicolum'],(1959)
Colletotrichum ipomoeae Sousa da Câmara, (1931)
Colletotrichum kruegerianum Vassiljevsky, (1950)
Colletotrichum melongenae Lobik, (1928)
Colletotrichum opuntiae (Ellis & Everh.) Sawada, (1959)
Colletotrichum phomoides (Sacc.) Chester, (1894)
Colletotrichum piperatum Ellis & Everh.
Colletotrichum primulae Moesz, (1924)
Colletotrichum vanillae Verpl. & Claess., (1934)
Gloeosporium alborubrum Petch, (1906)
Gloeosporium amygdalinum Brizi, (1896)
Gloeosporium cactorum Stoneman, (1898)
Gloeosporium callae Oudem., (1903)
Gloeosporium cingulatum G.F. Atk., (1892)
Gloeosporium dendrobii Maubl., (1906)
Gloeosporium elasticae Cooke & Massee
Gloeosporium eucalypti McAlpine, (1904)
Gloeosporium foliicola Nishida [as 'foliicolum'], (1924)
Gloeosporium fructigenum f. olivarum (J.V. Almeida) G.J.M. Gorter, (1962)
Gloeosporium hawaiense Thüm.
Gloeosporium lycopersici W. Krüger
Gloeosporium mangiferae Henn., (1898)
Gloeosporium manihotis Henn., (1903)
Gloeosporium melongenae Sacc., (1917)
Gloeosporium ochraceum F. Patt., (1900)
Gloeosporium oleae F. Patt., (1900)
Gloeosporium olivarum J.V. Almeida, (1899)
Gloeosporium opuntiae Ellis & Everh., (1888)
Gloeosporium passiflorae Speg., (1899)
Gloeosporium phomoides Sacc., (1882)
Gloeosporium piperatum Ellis & Everh., (1891)
Gloeosporium psidii Delacr., (1903)
Gloeosporium rubicola Ellis & Everh., (1896)
Gloeosporium syringae Allesch., (1895)
Gloeosporium vanillae Cooke, (1886)
Gloeosporium vexans G.F. Atk., (1897)
Glomerella lycopersici W. Krüger
Phomopsis phomoides (Sacc.) Arx, (1957)

Vermicularia atramentaria Berk. & Broome, (1850)

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[edit | edit source]

  1. Good plant protection practice. European and Mediterranean Plant Protection Organization.
  2. a b (2003). Black dot. Potato Coucil. Retrieved: 2010-07-28.