Septoria sp. nov., (Escallonia leaf-spot - causative organism)


5 Sep 2009 at OSGR: SY67 in Dorset, England

Record Summaryleaf spots on Escallonia
Found asAnamorph
Date5 September 2009
Associated organismEscallonia
OS grid refOSGR: SY67
Lat/Lon50° 40’ N, 2° 30’ W
Vice CountyDorset, VC no: 9
CountryEngland
Voucher5 Sep 2009[B]
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Notes:

Causes black spots with grey or white centre spots with surrounding black area. The black spots are often surrounded by a yellow (chlorotic) or black (necrotic) patch. The infection often runs along the margin of the leaf (may be following the rain flow.)

Pycnidia: epiphyllous, immersed, black, tip just protruding, issuing a whitish spore tendril. One or two pycnidia on white central spot and more on the surrounding black area.

Conidia: cylindric, often slightly sinuous, pointed at one end, 21-31/2µm, up to 3 septate.

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