Seifertia azaleae (Peck) Partr. & Morgan-Jones
(Rhododendron Bud Blast and Twig Blight - causative organism)

Taxonomic hierarchy:
SpeciesSeifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)
SubphylumPEZIZOMYCOTINA (a subphylum of ascomycetes)
PhylumASCOMYCOTA (spore shooters, ascomycete)
KingdomFUNGI (true fungi)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism) :
1: Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)
9 Jun 2001 OSGR: SU56 51° 20’ N, 1° 10’ W Vice County: Berks (VC 22) England
on dead flower buds of Rhododendron
Image 1: Infected flower budImage 2: Colony - magnifiedImage 3: Colony - magnified (2)Image 4: Colony - magnified (3)Image 5: ConidiaImage 6: Conidia (2)Image 7: ConidiophoreImage 8: Conidiophore - apex
2: Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)
7 Mar 1998 OSGR: SU56 51° 20’ N, 1° 10’ W Vice County: Berks (VC 22) England
on Rhododendron buds
Image 1: Infected Rhododendron bud - close-upImage 2: Infected Rhododendron budsImage 3: Leaf spray with infected buds
3: Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)
9 Apr 1978 OSGR: SU82 51° 0’ N, 0° 50’ W Vice County: West Sussex (VC 13) England
on Rhododendron
Image 1: ConidiomaImage 2: Conidiomata - close-upImage 3: Conidiomata - close-up (2)Image 4: Infected bud - close-upImage 5: Infected bud - close-up (2)

Identification Works

AuthorYearTitleSource
Fox, R.T.V. 1991 Fungal foes in your garden no 11: Bud Blast of Rhododendron & Azalea Mycologist Vol 05 (1): 34.

Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism) may also be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)
BioInfoBioInfo (www.bioinfo.org.uk) has 4 host/parasite/foodplant and/or other relationships for Seifertia azaleae (Rhododendron Bud Blast and Twig Blight - causative organism)

A very common minor pathogen of Rhododendron. There is no scientific evidence that it is spread by the Rhododendron Leafhopper (Graphocephala fennahi).

Creative Commons License
This website is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Licence.

Unless otherwise expressly stated, all original material on the BioImages website by Malcolm Storey is licensed under the above Creative Commons Licence.

Photographs from other photographers are used with permission but not included under the above CC licence.

BioImages - Virtual Field-Guide (UK)