Claim · model-written summary
Rudbeckia plants developed black leaf spots at RHS Garden Wisley.
- Taxon
- Rudbeckia fulgida var. sullivantii cv. Goldsturm
Rudbeckia fulgidae0 - Outcome
- black leaf spotse0
- Setting
- Royal Horticultural Society (RHS) Garden Wisleye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rudbeckia fulgida var. sullivantii cv. Goldsturm plants, purchased in the preceding May from a nursery in south-east England, were observed with black leaf spots in outdoor beds at the Royal Horticultural Society (RHS) Garden Wisley”
Title
First record of Septoria rudbeckiae on Rudbeckia in the United Kingdom
F. Newbery; R.J. Robinson; E. Beal; et al. New Disease Reports 2020. doi:10.5197/j.2044-0588.2020.042.002
Other claims from this paper (10)
- Observation Lower-leaf lesions coalesced into necrosis and spotting spread to higher leaves.
- Observation Flowering did not appear reduced.
- Observation Leaf-spot pycnidia were epiphyllous and measured 50–75 μm.
- Observation Conidia were filiform, 30–60 by 1.5–2 μm, with three septa.
- Observation The isolate ITS sequence differed by one base pair from the available S. rudbeckiae sequence.
- Observation The available Btub and EF1 sequences showed no more than 90% identity to the isolate.
- Intervention effect Inoculated plants developed black leaf lesions after four weeks.
- Observation Water-sprayed controls showed no symptoms.
- Observation Pycnidia and conidia consistent with S. rudbeckiae were found in each inoculation lesion.
- Observation The authors report the first occurrence of S. rudbeckiae in the United Kingdom.