Phytophthora infestans (Mont.) de Bary, (potato blight, potato late blight & tomato blight (causative agent))

20 Aug 2009 at OSGR: SU56 in Berks, England

Record Summaryinfection on Tomato plant
Found as
Date20 August 2009
Associated organismLycopersicon esculentum
OS grid refOSGR: SU56
Lat/Lon51° 20' N, 1° 10' W
Vice CountyBerks, VC no: 22
Voucher20 Aug 2009[A]
(Please quote this in any queries about this record)

Notes: Dark wrinkly patches on upper face of fruit, brown lesions on leaves, blackish-brown lesions on stems.

White mycelium developed a few days after collection.

Sporangia hyaline, pyriform, with apical papilla and residual basal stalk, 33-60/18-24µm; only weakly staining in Cotton Blue, and then mostly the immature sporangia.

The following literature was used to identify this find:

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