BioImages: The Virtual Field-Guide (UK)

Golovinomyces orontii (Castagne) V.P. Heluta, 1988 (a powdery mildew)

Date: 12 June 2005
Location: Berks, England
Voucher: 12/06/2005[B]
(Please quote this in any queries about this record)
State: Imperfect stage
Record Summary: on Keeled-fruited Corn Salad, growing between pebbles in centre of driveway.
Associated organism: on live green parts of Valerianella carinata
Identification Notes: Conidia: 23-33/14-15.5µm, euoidium type.

Have known this in the garden for at least three years, where it grows on Valerianella between the pebbles down the centre of the drive. Unfortunately this is a very dry sun-baked spot and the host dies by mid-June, before cleistothecia have formed.

Images etc

naked eye photograph Infected leaf - lower surface - highly enlarged 500 by 444 pixels
naked eye photograph Infected leaf - upper surface - highly enlarged 500 by 412 pixels
naked eye photograph Infected leaves - lower surfaces - close-up 500 by 291 pixels
naked eye photograph Infected leaves - upper surfaces - close-up 500 by 317 pixels
naked eye photograph Infected plant - close-up 500 by 332 pixels
naked eye photograph Infected plant - close-up 500 by 372 pixels
naked eye photograph Infected plant - in situ 500 by 384 pixels
microscope photograph Conidia - magnified 42 Kb 385 by 379 pixels
microscope photograph Conidia - magnified 500 by 420 pixels
microscope photograph Conidia and part of conidiophore - magnified 465 by 500 pixels
microscope photograph Conidia and part of conidiophore - magnified 500 by 398 pixels
microscope photograph Conidiophore - magnified 295 by 500 pixels
microscope photograph Conidiophore - magnified 380 by 500 pixels

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