Pustula obtusata s. str. (Link) C. Rost, (a white rust)


7 Jun 2005 at OSGR: ST95 in South Wilts, England

Record Summaryinfection on underside of leaves of Greater Knapweed
Found as
Date7 June 2005
Associated organismCentaurea scabiosa
OS grid refOSGR: ST95
Lat/Lon51° 20’ N, 2° 0’ W
Vice CountySouth Wilts, VC no: 8
CountryEngland

Notes:

Seems to be associated with grazed patches.

Short chains of smooth featureless hyaline cells 15.5-20/20.5µm diam.

Possibilities:

1. gall (ie plant growth response to ?insect attack)

2. fungus (perhaps Albugo or related - the "spores" look nothing like "white rusts")

The following literature was used to identify this find:

standard photographs and close-ups
standard photographs and close-ups:
macro-photographs
macro-photographs:
photomicrographs
photomicrographs:

Click on a thumbnail to see the preview, then click on that for the full-sized image

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)