BioImages: The Virtual Field-Guide (UK)
Phytophthora infestans (Mont.) de Bary, 1876 (Potato Blight, Potato Late Blight & Tomato Blight (Causative Agent))
||20 August 2009
|OS grid ref:
||51° 20' N, 1° 10' W
||Vice County: Berks, VC22, England
(Please quote this in any queries about this record)
||infection on Tomato plant
||on live fruit, leaf, stem of Lycopersicon esculentum
||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.