Peronospora verbenae U. Braun, Jage, Udo Richt. & H.J. Zimm., (verbena downy mildew)


28 May 2009 at OSGR: SU88 in Bucks, England

Record Summaryon Vervain leaves
Found as
Date28 May 2009
Associated organismVerbena officinalis
OS grid refOSGR: SU88
Lat/Lon51° 30’ N, 0° 50’ W
Vice CountyBucks, VC no: 24
CountryEngland
Voucher28 May 2009[A]
(Please quote this in any queries about this record)

Notes:

Causing extensive yellowish discolouration with sparse infection beneath, then dead brown patches with more vigorous hyphal growth beneath.

Infection dirty whitish, densely tufted under lens.

Sporangiophores richly branched, sporangia pale violaceous grey, smooth, ovoid, 28-36/19-25µm, thin-walled and often collapsing or bursting.

First UK record on this host.

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