Phytophthora infestans (Mont.) de Bary, 1876 (Potato Blight, Potato Late Blight & Tomato Blight (Causative Agent))

Date:	20 August 2009
OS grid ref:	SU56
Lat/Lon:	51° 20' N, 1° 10' W
Location:	Vice County: Berks, VC22, England
Voucher:	20/08/2009[A] (Please quote this in any queries about this record)
Record Summary:	infection on Tomato plant
Associated organism:	on live fruit, leaf, stem of Lycopersicon esculentum
Identification 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.