Peronospora verbenae U. Braun, Jage, Udo Richt. & H.J. Zimm.
(Verbena Downy Mildew)

Taxonomic hierarchy:
SpeciesPeronospora verbenae (Verbena Downy Mildew)
GenusPeronospora (a genus of downy mildews)
FamilyPERONOSPORACEAE (downy mildews)
OrderPERONOSPORALES (downy mildews and white rusts)
ClassPERONOSPOREA (a class of fungoid organisms)
PhylumOOMYCOTA (a group of mainly plant-parasitic fungi)
KingdomCHROMISTA (algae)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Peronospora verbenae (Verbena Downy Mildew) :
1: Peronospora verbenae (Verbena Downy Mildew)
11 Oct 2009 OSGR: SU23 51° 0’ N, 1° 40’ W Vice County: South Wilts (VC 8) England
hypophyllous, on Vervain leaves
Image 1: Sporangia - magnifiedImage 2: Sporangia - highly magnifiedImage 3: Sporangiophore - microscope low magnification
2: Peronospora verbenae (Verbena Downy Mildew)
5 Sep 2009 OSGR: SY67 50° 40’ N, 2° 30’ W Vice County: Dorset (VC 9) England
old infection on underside of old leaf spots on old leaves of Vervain
Image 1: Infected leaves - top surfacesImage 2: Infected leaves - under surfacesImage 3: Infection - leaf top surface - close-up - enlargedImage 4: Infection - leaf top surface - close-up - enlarged (2)Image 5: Infection - leaf under surface - close-up - enlargedImage 6: Infection - leaf under surface - close-up - enlarged (2)Image 7: Sporangiophores - microscope low magnification
3: Peronospora verbenae (Verbena Downy Mildew)
28 May 2009 OSGR: SU88 51° 30’ N, 0° 50’ W Vice County: Bucks (VC 24) England
on Vervain leaves
Image 1: Infected leaves - top surfaces - dark backgroundImage 2: Infected leaves - under surfaces - dark backgroundImage 3: Infection - from top of leaf - close-up - highly enlargedImage 4: Infection - on underside of lesion - close-up - highly enlargedImage 5: Infection - on underside of lesion - close-up - magnifiedImage 6: Infection - on underside of lesion - close-up - magnified (2)Image 7: Infection - on underside of lesion - close-up - magnified (3)Image 8: Infection - on underside of lesion - close-up - magnified (4)Image 9: Infection - on underside of lesions - close-up - highly enlargedImage 10: Infection - on underside of lesions - close-up - highly enlarged (2)Image 11: Infection - on underside of living leaf - close-up - highly enlargedImage 12: Infection - on underside of living leaf - close-up - magnifiedImage 13: Infection - on underside of living leaf - close-up - magnified (2)Image 14: Sporangia and sporangiophore branches - magnifiedImage 15: Sporangia - magnifiedImage 16: Sporangiophore - microscope low magnificationImage 17: Sporangiophore - microscope low magnification (2)Image 18: Sporangiophore - microscope low magnification (3)Image 19: Sporangiophores - microscope low magnificationImage 20: Sporangiophores - microscope low magnification (2)

Identification Works

AuthorYearTitleSource
Anon. 2009 Verbena downy mildew Plant Clinic News Sept 09: 1.
Braun, U., Jage, H., Richter, U. & Zimmermann, H. 2009 Peronospora verbenae sp. nov. – a new downy mildew on Verbena officinalis Schlechtendalia Vol 19: 77-80.
Choi, Y.J., Lebeda, A., Sedlarova, M. & Shin, H.D. 2010 First report of downy mildew caused by Peronospora verbenae on verbena in the Czech Republic New Disease Reports 21.

Peronospora verbenae (Verbena Downy Mildew) may also be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Peronospora verbenae (Verbena Downy Mildew)
BioInfoBioInfo (www.bioinfo.org.uk) has 1 host/parasite/foodplant and/or other relationships for Peronospora verbenae (Verbena Downy Mildew)

An apparently undescribed downy mildew which was found during the present project. First record in Buckinghamshire.

Infects the lower leaves of Vervain causing pale green and brown blotches.

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